Journal Papers Under Review

  • Mohamed Salman and Mahesh K. Varanasi, “Capacity Results for the K-User Broadcast Channel with Two Nested Multicast Messages” Under review, IEEE Trans. Information Theory.
  • Kaniska Mohanty and Mahesh K. Varanasi, "On the Generalized Degrees of Freedom of the MIMO Interference Channel with Delayed CSIT" Under review, IEEE Trans. Information Theory.

Upcoming Workshop/Conference Presentations

  • Y. Pang and M. K. Varanasi, ”Bounds on the Capacity Region of the Three-User One-to-Three MIMO Interference Channel” accepted, IEEE ISIT 2018, Vail, CO.
  • M. Salman and M. K. Varanasi, ”The Capacity Region of the Three-Receiver Less Noisy Broadcast Channel With Message Cognition”, accepted, IEEE ISIT 2018, Vail, CO.
  • M. Salman and M. K. Varanasi, ”An Achievable Rate Region for the K-Receiver Two Nested Groupcast DM Broadcast Channel and a Capacity Result for the Combination Network”, accepted, IEEE ISIT 2018, Vail, CO.
  • M. Salman and M. K. Varanasi, ”A New Approach to Linear Degrees of Freedom: the MIMO Broadcast Channel with Hybrid CSIT” accepted, IEEE ISIT 2018, Vail, CO.

Journal Publications

  • Y. Pang and M. K. Varanasi, “A unified theory of multiple-access and interference channels via approximate capacity regions for the MAC-IC-MAC”, IEEE Transactions on Information Theory (date of online publication: Aug. 2018).
  • Romero, Henry P., and Mahesh K. Varanasi. ”Hierarchical successive group decoding achieves capacity in the multiple access channel with general message sets.” IEEE Transactions on Information Theory 64.6 (2018): 4562-4580.
  • Kaniska Mohanty and Mahesh K. Varanasi. “The Generalized Degrees of Freedom Region of the MIMO Z-Interference Channel with Delayed CSIT” IEEE Transactions on Information Theory 64.1 (2018): 531-546.
  • D. Grant and Mahesh K. Varanasi, “Feasibility of Single-Beam Interference Alignment in Multi-Carrier Interference Channels,” IEEE Transactions on Information Theory 63.11 (2017): 7352-7357.
  • Yao Wang and Mahesh K. Varanasi, “Degrees of Freedom of the Two-User MIMO Broadcast Channel with Private and Common Messages Under Hybrid CSIT Models.” IEEE Transactions on Information Theory 63.9 (2017): 6004-6019.
  • H. P. Romero and M. K. Varanasi, “The K-User Vector Gaussian Multiple-Access Channel with General Messages Sets: Capacity, Polymatroidal Structure, and Efficient Computation,” IEEE Transactions on Information Theory, Vol. 63, No. 6, 2017, pp. 3875-3893.
  • Y. Wang and M. K. Varanasi, “Degrees of Freedom of the MIMO 2 × 2 Interference Network with General Message Sets,” IEEE Transactions on Information Theory, Vol. 63, No. 5, 2017 pp. 3259-3276.
  • H. P. Romero and M. K. Varanasi, “A Unifying Order-Theoretic Framework for Superposition Coding: Polymatroidal Structure and Optimality in the Multiple-Access Channel With General Message Sets,” in IEEE Transactions on Information Theory, vol. 63, no. 1, pp. 21-37, Jan. 2017.
  • K. Mohanty and M. K. Varanasi, “The Degrees of Freedom of the K -User MIMO Cyclic Z-Interference Channel Under Perfect and Delayed CSIT Assumptions,” in IEEE Transactions on Wireless Communications, vol. 16, no. 1, pp. 17-25, Jan. 2017,
  • K. Mohanty and Mahesh K. Varanasi. “Degrees of Freedom Region of the MIMO Z-Interference Channel With Mixed CSIT.” IEEE Communications Letters No. 20, Vol. 12, Dec. 2016, pp. 2422- 2425.
  • K. Mohanty and M. K. Varanasi, “Optimal Interference Alignment for the MIMO Z-Interference Channel with Delayed CSIT” IEEE Commun. Letters, December, 2015.
  • S. Karmakar and M. K. Varanasi, “The Diversity-Multiplexing Tradeoff of the MIMO Z Interference Channel,” IEEE Trans. Inform. Th, No. 6, Vol. 61, Jun. 2015, pp. 3427 - 3445.
  • C. S. Vaze and M. K. Varanasi, “The degrees of freedom of two-unicast layered MIMO interference networks with feedback,” IEEE Trans. Inform. Th, No. 6, Vol. 61, June 2015, 3316 - 3325.
  • K. Mohanty, C. S. Vaze and M. K. Varanasi, “The Degrees of Freedom Region of the MIMO Interference Channel with Hybrid CSIT,” IEEE Trans. Wireless Commun., No. 4, Vol. 14, April 2015, pp. 1837 - 1848.
  •  C. S. Vaze and M. K. Varanasi, “The Degrees of Freedom Region of the 2 × 2 × 2 MIMO Interference Network,” IEEE Trans. Inform. Th, No. 12, Vol. 60, Dec. 2014, pp. 7751 - 7759.
  • C. S. Vaze and M. K. Varanasi, “Independent signaling achieves the capacity region of the Gaussian interference channel with common information to within one bit,” IEEE Trans. Inform. Th, No. 10, Vol. 60, Oct. 2014, pp. 6070 - 6079.
  • S. Limburg, D. Grant and M. K. Varanasi ”Higher genus universally decodable matrices (UDMG),” Advances in Mathematics of Communications (an American Mathematical Society journal), Vol. 8, No. 3, 2014, pp. 257-270.
  • C. S. Vaze and M. K. Varanasi, “The degrees of freedom of MIMO networks with full-duplex receiver cooperation but no CSIT,” IEEE Trans. Inform. Th, No. 9, Vol. 60, Sept. 2014, pp. 5587 -5596.
  • R. T. Krishnamachari, M. K. Varanasi and K. Mohanty, “MIMO systems with quantized covariance feedback,” IEEE Trans. Signal Processing, Vol. 62, Issue 2, Jan. 2014, pp. 485-495.
  • R. T. Krishnamachari and M. K. Varanasi, “On the geometry and quantization of manifolds of positive semidefinite matrices,” IEEE Trans. Signal Processing, Vol. 61, Issue 18, Sept. 2013, pp. 4587 - 4599.
  • R. T. Krishnamachari and M. K. Varanasi, “Interference Alignment Under Limited Feedback for MIMO Interference Channels,” IEEE Trans. Signal Processing, Vol. 61, No. 15, Aug. 2013, pp. 3908-3917.
  • H. P. Romero and M. K. Varanasi, “Bounds on the Capacity Region for a Class of Interference Channels with Common Information,” IEEE Trans. Inform. Th, No. 8, Vol. 59, Aug. 2013, pp. 4811-4818.
  • C. S. Vaze and M. K. Varanasi, “The Degrees of Freedom Region of the MIMO Interference Channel with Shannon Feedback,” IEEE Trans. Inform. Th, No. 8, Vol. 59, Aug. 2013, pp. 4798 - 4810.
  • S. Karmakar and M. K. Varanasi, “The Capacity Region of the MIMO Interference Channel and its Reciprocity to Within a Constant Gap,” IEEE Trans. Inform. Th, No. 8, Vol. 59, Aug. 2013, pp. 4781 - 4797.
  • S. Karmakar and M. K. Varanasi, “The Diversity-Multiplexing-Tradeoff of the MIMO Half-Duplex Relay Channel,” IEEE Trans. Inform. Th, No. 12, Vol. 58, Dec. 2012, pp. 7168-7187.
  • S. Karmakar and M. K. Varanasi, “The Generalized Degrees of Freedom Region of the MIMO Interference Channel,” IEEE Trans. Inform. Th, No. 12, Vol. 58, Dec. 2012, pp. 7188-7203.
  • C. S. Vaze and M. K. Varanasi, “A New Outer-Bound via Interference Localization and the Degrees of Freedom Regions of MIMO Interference Networks with no CSIT,” IEEE Trans. Inform. Th, No. 11, Vol. 58, Nov. 2012, pp. 6853-6869.
  •  C. S. Vaze and M. K. Varanasi, “The Degrees of Freedom Regions of MIMO Broadcast, Interference, and Cognitive Radio Channels with No CSIT,” IEEE Trans. Inform. Th, Vol. 58, No. 8, Aug. 2012, pp. 5354-5374.
  •  C. S. Vaze and M. K. Varanasi, “The Degrees of Freedom Region and Interference Alignment for the MIMO Interference Channel with Delayed CSIT,” IEEE Trans. Inform. Th, Vol. 58, No. 7, Jul. 2012, pp. 4396-4417.
  • S. Karmakar and M. K. Varanasi, “Diversity-Multiplexing Tradeoff of the Dynamic Decode-and-Forward Protocol for the MIMO Half-Duplex Relay Channel,” IEEE Trans. Inform. Th, Vol. 57 No. 10, Oct. 2011, pp. 6569-6590.
  • Y. Jiang, M. K. Varanasi and J. Li “Performance Analysis of ZF and MMSE Equalizers for MIMO Systems: An In-Depth Study of the High SNR Regime,” IEEE Trans. Inform. Th., Vol. 57, No. 4, Apr. 2011, pp. 2008-2026.
  •  N. Prasad and M. K. Varanasi, “High Performance Static and Dynamic Cooperative Communication Protocols for the Half Duplex Fading Relay Channel,” IEEE Trans. Wireless Commun.. Vol. 9, No. 1, Jan. 2010, pp. 328-337.
  • Y. Jiang and M. K. Varanasi, “The RF-Chain Limited MIMO System: Part I Optimum Diversity-Multiplexing Tradeoff,” IEEE Trans. Wireless Commun., Vol. 8, No. 10, Oct. 2009, pp.5238-5247.
  • S. Srinivasan and M. K. Varanasi, “Optimal constellations for the low SNR noncoherent MIMO Rayleigh fading channel,” IEEE Trans. Inform Th., Vol. 55, Feb. 2009, pp. 776-796.
  • N. Prasad and M. K. Varanasi, “An optimization approach to decision feedback detection under modulation constraints for MIMO Rayleigh fading channels,” IEEE Trans. Wireless Commun., Vol. 7, No. 9, Dec. 2008.
  •  N. Prasad, M. K. Varanasi, L. Venturino and X. Wang, “An Analysis of the MIMO-SDMA Channel with Space-Time Orthogonal and Quasi-Orthogonal User Transmissions and Efficient Successive Cancellation Decoders,” IEEE Trans. Inform Th., Vol. 54, No. 11, Dec. 2008, pp. 5427-5446.
  • N. Prasad, G. Yue, X. Wang and M. Varanasi, “Optimum Successive Group Decoders for MIMO Multiple-Access Channels,” IEEE Trans. Inform. Th., Vol. 54, No. 10, Oct. 2008, pp. 4821 - 4846.
  • P. Dayal and M. K. Varanasi, “Distributed QAM-Based Space-Time Block Codes for Efficient Cooperative Multiple-Access Communication,” IEEE Trans. Inform Th., Vol. 54, No. 9, Sept. 2008 pp. 4342-4354.
  • Y. Jiang and M. K. Varanasi, “Spatial multiplexing architectures with jointly designed rate-tailoring and ordered BLAST decoding Part II: A practical method for rate and power allocation,” IEEE Trans. Wireless Commun., Vol. 7, No. 8, Aug. 2008 pp. 3262-3271.
  • Y. Jiang and M. K. Varanasi, “Spatial multiplexing architectures with jointly designed rate-tailoring and ordered BLAST decoding Part I: Diversity-multiplexing trade-off analysis,” IEEE Trans. Wireless Commun., Vol. 7, No. 8, Aug. 2008 pp. 3252 - 3261.
  • D. R. Grant and M. K. Varanasi, “The Equivalence of Space-Time Codes and Codes defined over Finite Fields and Galois Rings,” Advances in Mathematics of Communications (AMC) (an American Institute of Mathematical Sciences (AIMS) Journal), Vol. 2, No. 2, May, 2008 pp. 131-145.
  •  N. Prasad and M. K. Varanasi, “Analysis and optimization of diagonally layered lattice schemes for MIMO fading channels,” IEEE Trans. Info. Theory, Vol. 54, No. 3, Mar. 2008, pp. 1162-1185.
  • D. R. Grant and M. K. Varanasi, “Duality theory for space-time codes over finite fields,” Advances in Mathematics of Communications (AMC) (an American Institute of Mathematical Sciences (AIMS) Journal), Vol. 2, No. 1, Feb. 2008, pp. 35-54.
  • S. Srinivasan and M. K. Varanasi, “Optimal spatial correlations for the noncoherent MIMO Rayleigh fading channel,” IEEE Trans. Wireless Comm., Vol. 6, No. 10, Oct 2007, pp. 3760-3769.
  • D. Das and M. K. Varanasi, “Blind algorithms for joint optimization for multiuser receivers and power control,” IEEE Trans. Wireless Comm., Vol. 6, No. 8, Aug. 2007 pp. 3374-3383.
  • A. Kapur, M. K. Varanasi and C. T. Mullis, ”Signal Design for Bandwidth Efficient Multiple Access under Asymptotic Effective Energy Constraints” IEEE Trans. Wireless Comm., Vol. 6, No. 8, Aug 2007 pp. 2837-2847.
  • S. Srinivasan and M. K. Varanasi, “Constellation Design for the Noncoherent MIMO Rayleigh Fading Channel at General SNR,” IEEE Trans. Inform Th., Vol. 53, No. 4, April 2007 pp. 1572-1584.
  • N. Prasad and M. K. Varanasi, “Outage Theorems for MIMO Block Fading Channels,” IEEE Trans. Info. Theory, vol. 52, No. 12, Dec. 2006 pp. 5284–5296.
  • M. K. Varanasi, C.T. Mullis and A. Kapur, “On the Limitation of Linear MMSE Detection,” IEEE Trans. Info. Theory, vol. 52, No. 9, pp. 4282–4286, Sept. 2006.
  • M. K. Varanasi and P. Dayal, “Unified Multi-Antenna Code Design for Fading Channels with Spatio-Temporal/Spectral Correlations,” IEEE Trans Wireless Comm., Vol. 5, No. 8, pp. 2266–2276, Aug. 2006.
  • P Dayal and M. K. Varanasi “An algebraic family of complex lattices for fading channels with application to space-time codes,” IEEE Trans. Info. Theory, vol. 51, No. 12, 4184-4202 Dec. 2005.
  • P. Dayal and M. K. Varanasi “An optimal two transmit antenna space-time code and its stacked extensions,” IEEE Trans. Info. Theory, vol. 51, No. 12, 4348-4355 Dec. 2005.
  • A. Kapur, M. K. Varanasi and C.T. Mullis, “On the Limitation of Generalized Welch Bound Equality Signals,” IEEE Trans. Info. Theory, vol. 51, No. 5, 2220-2224 Jun. 2005.
  • P. Dayal and M. K. Varanasi, “Maximal Diversity Algebraic Space-Time Codes with Low Peak-to-Mean Power Ratio,’ IEEE Trans. Inform. Th., vol. 51, No. 5, May 2005, 1691-1709.
  • T. Guess and M. K. Varanasi, “Information-Theoretic Framework for Deriving Canonical Decision-Feedback Receivers in Gaussian Channels,” IEEE Trans. Inform. Th., vol. 51, No. 1, 173-187 Jan. 2005.
  • P. Dayal, M. Brehler and M. K. Varanasi, “Leveraging Coherent Space-Time Codes for Non-coherent Communication via Training,” IEEE Trans. Inform. Th., vol. 50, No. 9, Sept 2004, pp. 2058-2080.
  • D. Das and M. K. Varanasi, “Optimum Noncoherent Multiuser Decision Feedback Detection,” IEEE Trans. Inform. Th., vol. 50, No. 9, Sept 2004, pp. 1974-1988.
  • F. Bandiera, G. Ricci and M. K. Varanasi, “Blind Multiuser Detection Over Highly-Dispersive CDMA Channels,” IEEE Trans. Commun., vol. 52, No. 8, Aug 2004, pp. 1377-1387.
  • N. Prasad and M. K. Varanasi, “Analysis of Decision Feedback Detection for MIMO Rayleigh-Fading Channels and the Optimization of Power and Rate Allocations,” IEEE Trans. Inform. Th., vol. 50, No. 6, Jun 2004, pp 1009–1025.
  • A. Kapur and M. K. Varanasi, “Multiuser Detection for Overloaded CDMA Systems,” IEEE Trans. Inform. Th., vol. 49, No. 6, Jun 2003, pp 1728–1742.
  • M. Brehler and M. K. Varanasi, “Optimum Receivers and Low-Dimensional Spreaded Modulation for Multiuser Space-Time Communications,” IEEE Trans. Inform. Th., vol. 49, No. 4, Apr., 2003,pp 901–918.
  • M. Brehler and M. K. Varanasi, “Optimum Multiuser Noncoherent DPSK Detection in Generalized Diversity Rayleigh Fading Channels,” IEEE Trans. Inform. Th., vol. 49. No. 6, Jun., 2003, pp 1565–1574.
  • T. Guess and M. K. Varanasi, “A Comparison of Bandwidth-Efficient Multiple Access to Other Signal Designs for Correlated Waveform Multiple-Access Communications,” IEEE Trans. Inform. Th., vol. 49, No. 6, Jun., 2003, pp 1558–1564.
  •  M. L. McCloud, L. L. Scharf, M. K. Varanasi, “Beamforming, Diversity and Interference Rejection for Noncoherent Multiuser Communication over Fading Channels with a Receive Antenna Array,” IEEE Trans. Commun., vol. 51, No. 1, Jan. 2003, pp. 116-124.
  • [ D. Das and M. K. Varanasi, “Blind Adaptive Multiuser Detection Using Stochastic Approximation with Averaging,” IEEE Journ. Selec. Areas Commun., vol. 20, No. 2, Feb. 2002, pp. 310-320.
  • A. Russ and M. K. Varanasi, “An Error Probability Analysis of the Optimum Noncoherent Multiuser Detector for Multipath and Multi-Antenna Diversity Communications over Rayleigh Fading Channels,” IEEE Trans. Commun.. Vol. 50, Nov. 2002, pp. 1828-1840.
  • M. McCloud, M. Brehler and M. K. Varanasi, “Signal Design and Convolutional Coding for Noncoherent Space-Time Communications on the Rayleigh Fading Channel,” IEEE Trans. Inform. Th.. vol. 48, No. 5, May 2002, pp. 1186-1194.
  • M. K. Varanasi and D. Das, “Fast Stochastic Power Control for Nonlinear Multiuser Receivers,” IEEE Trans. Commun. Vol. 50, No. 11, Nov. 2002, pp. 1817-1827.
  • G. Ricci, M. K. Varanasi and A. De Maio, “Blind Multiuser Detection via Interference Identification,” IEEE Trans. Commun. Vol. 50, No. 7, July 2002, pp. 1172-1181.
  • A. Kapur, D. Das and M. K. Varanasi, “ Noncoherent MMSE Multiuser Receivers and Their Blind Adaptive Implementations,” IEEE Trans. Commun., Vol. 50, No. 3, Mar. 2002, pp. 503-513.
  • M. McCloud and M. K. Varanasi, “Modulation and Coding for Noncoherent Communications,” Journ. VLSI Signal Processing, Special Issue on Signal Processing for Wireless Communications, vol. 30, No. 1/2/3, Jan/Feb/Mar. 2002 (invited paper), pp 35-54.
  • M. Brehler and M. K. Varanasi, “Asymptotic Error Probability Analysis of Quadratic Receivers in Rayleigh Fading Channels with Applications to a Unified Analysis of Coherent and Noncoherent Space-Time Receivers,” IEEE Trans. Inform. Th., vol. 47, No. 6, September, 2001, pp. 2383-2399.
  • E. Fain and M. K. Varanasi, “Group-Metric Multiuser Decoding,” IEEE Trans. Commun., vol. 49, No. 6, June 2001, pp. 1021-1032.
  • M. K. Varanasi and T. Guess, “Bandwidth-Efficient Multiple-Access (BEMA): A New Strategy Based on Signal Design for Multiuser Receivers Under Quality-of-Service Constraints,” IEEE Trans. Commun., vol. 49, No. 5, May 2001, pp. 844-854.
  • A. Russ and M. K. Varanasi, “Noncoherent Multiuser Detection for Nonlinear Modulation Over the Rayleigh Fading Channel,” IEEE Trans. Inform.Th., vol. 47, No. 1, Jan. 2001, pp. 295-307.
  • D. Das and M. K. Varanasi, “Blind Adaptive Noncoherent Multiuser Detection for Nonlinear Modulation,” IEEE Trans. Commun., vol. 48, No. 11, Nov. 2000, pp. 1871-1881.
  • T. Guess and M. K. Varanasi, “Signal Design for Bandwidth Efficient Multiple-Access Communications Based on Eigenvalue Optimization,” IEEE Trans. Inform. Th., vol. 46, No. 5, Sept. 2000, pp. 2045-2058.
  • T. Guess and M. K. Varanasi, “Error Exponents for the Joint Maximum-Likelihood and Successive Decoders for the Gaussian Multiple-Access Channel,” IEEE Trans. Inform. Th. vol. 46, No. 4, July 2000, pp. 1683-1691.
  • E. A. Fain and M. K. Varanasi, “Diversity Order Gain for Narrowband Multiuser Communications with Pre-Combining Group Detection,” IEEE Trans. Commun., 48:4, Apr.2000, pp. 533-536.
  • M. K. Varanasi and D. Das, “Noncoherent Decision Feedback Multiuser Detection,” IEEE Trans. Commun. 48:2, Feb.2000, pp.259-269.
  • M. K. Varanasi, “A Systematic Approach to the Design and Analysis of Optimum DPSK Receivers for Generalized Diversity Communications over Rayleigh Fading Channels,” IEEE Trans. Commun. vol. 47, No. 9, Sept. 1999, pp 1365-1375.
  • M. K. Varanasi, “Decision Feedback Multiuser Detection: A Systematic Approach,” IEEE Trans. Inform. Th., vol. 45, No. 1, Jan. 1999, pp. 219-240.
  • M. K. Varanasi and A. Russ, “Noncoherent Decorrelative Detection for Nonorthogonal Multipulse Modulation Over the Multiuser Gaussian Channel,”IEEE Trans. Commun., vol. 46, No. 12, Dec. 1998, pp. 1675-1684.
  • S. Vasudevan and M. K. Varanasi, “Achieving Near-Optimum Asymptotic Efficiency and Fading Resistance over Time-Varying Rayleigh Fading CDMA Channels,” IEEE Trans. Commun., 44:9, (September 1996), pp. 1130-1143.
  • D. Parsavand and M. K. Varanasi, “RMS Bandwidth Constrained Signature Waveforms that Maximize the Total Capacity of PAM-Synchronous CDMA Channels,” IEEE Trans. Commun., COM44:1, (January 1996), pp. 65-75.
  • M. K. Varanasi, “Parallel Group Detection for Synchronous CDMA Communication Over Frequency-Selective Rayleigh Fading Channels,” IEEE Trans Inform Th., 42:1, (January 1996).
  • M. K. Varanasi, “Group Detection for Synchronous Gaussian Code-Division Multiple-Access Channels,” IEEE Trans Inform Th., 41:4 (July 1995), pp. 1083-1096.
  • S. Vasudevan and M. K. Varanasi, “Optimum Diversity Combiner Based Multiuser Detection for Time-Dispersive Rician Fading CDMA Channels,” the special issue on Code Division Multiple-Access Networks of the IEEE Journal of Selected Areas in Commun., JSAC-12:4, (May 1994), pp. 580-592.
  • M. K. Varanasi and S Vasudevan, “Multiuser Detectors for Synchronous CDMA Communication over Nonselective Rician Fading Channels,” IEEE Trans Commun., COM-42:2, (February 1994), pp. 711–722.
  • M. K. Varanasi, “Noncoherent Detection in Asynchronous Multiuser Channels,” IEEE Trans Inform Th 39:1 (January 1993), pp. 157–176.
  • M. K. Varanasi and B. Aazhang, “Optimally Near-Far Resistant Multiuser Detection in Differentially Coherent Synchronous Channels,” IEEE Trans Inform Th 37:4 (July 1991), pp. 1006–1018.
  • M. K. Varanasi and B. Aazhang, “Near-Optimum Detection in Synchronous Code-Division Multiple-Access Systems,” IEEE Trans Commun COM-39:5 (May 1991), pp. 725–736.
  • M. K. Varanasi and B. Aazhang, “Multistage Detection in Asynchronous Code-Division Multiple-Access Communications,” IEEE Trans Commun 38:4 (April 1990), pp. 509–519.
  • M. K. Varanasi and B. Aazhang, “Probability of Error Comparison of Linear and Iterative Multiuser Detectors,” Lecture Notes in Control and Information Sciences 129: 15-26, Springer Verlag, New York, 1989.
  • M. K. Varanasi and B. Aazhang, “Generalized Gaussian Density Estimation,” Journ. Acous. Soc. Amer. 86: (4) 1404-1415, Oct. 1989.

Invited Presentations/Publications

  • M. K. Varanasi, “A New Achievable Rate Region for the Broadcast Channel with General Message Sets,” Proc. Information Theory and Applications (ITA) Workshop, UCSD, San Diego, CA (invited), Jan. 31- Feb. 5, 2016.
  • M. K. Varanasi, “A unified order-theoretic view of the capacity region of the DM-MAC with general message sets,” Proc. Information Theory and Applications (ITA) Workshop, UCSD, San Diego, CA (invited), Feb. 2-6, 2015.
  • M. K. Varanasi, “The degrees of freedom of MIMO networks with full-duplex receiver cooperation but no CSIT,” Workshop on Interference in Wireless Networks, Boston University, June 2012 (joint work with C. S. Vaze).
  • C. S. Vaze and M. K. Varanasi, “Retro-cooperative interference alignment and the DoF region of the (M, N) 3 interference network with limited Shannon feedback,” Proc. Conf. Inform. Sc. Systems, Princeton University, Princeton, NJ, Mar. 21-23, 2012.
  • M. K. Varanasi “Beamforming and aligned interference neutralization achieve the degrees of freedom of the MIMO 2x2x2 interference network,” Proc. Information Theory and Applications Workshop, UCSD, San Diego, CA (invited), Feb. 5-10, 2012 (joint work with C. S. Vaze).
  • M. K. Varanasi, “A large system analysis of the imperfect CSIT Gaussian broadcast channel with a DPC-based transmission Strategy,” Conf. Inform. Sciences. & Systems (CISS), Princeton University, Princeton. NJ, Mar. 2010 (joint work with C. S. Vaze).
  • M. K. Varanasi, “A Large System Analysis of Dirty Paper Coding over Broadcast Channels with Limited Feedback,” Conf. Inform. Sciences,” Qualcomm Inc., San Diego, CA, Mar. 2010 (joint work with C. S. Vaze).
  • M. K. Varanasi (with C. S. Vaze), “Interference Cancellation with Dirty Paper Coding for MIMO Systems with Partial CSIT,” Qualcomm Inc., San Diego, CA, Feb. 2009.
  • M. K. Varanasi, ”Interference Cancellation in SDMA Quasi-Static Fading Channels,” Qualcomm Inc. San Diego, CA, Sept. 2008.
  • D. Grant and M. K. Varanasi, “Non-associative division algebras and space-time code construction,” Sequences and Codes, IRMACS, Simon Fraser University, Vancouver, BC Canada, July, 2006.
  • M. K. Varanasi and N. Prasad, “High-Performance Cooperative Communication Protocols for the Half-Duplex Channel,” IEEE Communication Theory Workshop, Puerto Rico, May, 2006.
  • D. Grant and M. K. Varanasi, “Duality theory for space-time codes over finite fields,” Americal Mathematical Society Meeting, Lincoln, Nebraska, Oct 2005.
  • M. K. Varanasi and N. Prasad, “MIMO Outage Capacity in the High SNR Regime,” IEEE Communication Theory Workshop, Utah, Jun. 2005 (invited talk).
  • P. Dayal and M. K. Varanasi, “Generalized Multiuser QAM based Cooperation Strategy and an Optimal Two-User Scheme,” 2005 International Conference on Wireless Networks, Communications and Mobile Computing, Volume 2, 13-16 Maui, Hawaii, June 2005 Page(s):1430 - 1435.
  • P. Dayal and M. K. Varanasi, “Unified Multi-Antenna Code Design for Fading Channels with Spatio-Temporal Correlations,” Proc. 38th Annual Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 2004.
  • N. Prasad and M. K. Varanasi, “Bounds on Error Probabilities for the Block Fading Channel with Applications,” Proc. 38th Annual Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 2004.
  • N. Prasad and M. K. Varanasi, “Optimum efficiently decodable layered space-time block codes,” 35th Annual Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 2001.
  • N. Prasad and M. K. Varanasi, “Error probability analysis of decision feedback detection for MIMO Rayleigh fading channels and optimum allocation of transmit powers and QAM constellations,” Proc. 39th Annual Allerton Conf. on Commun., Control, and Comput., Allerton. IL, Oct. 2001.
  • M. Brehler and M. K. Varanasi, “Low-Dimensional Spreading Matrices for Multiuser Space-Time Modulation,” IEEE Inform. Th. Workshop, Cairns, Australia, Sept. 2001.
  • M. K. Varanasi and A. Russ, “Optimum Noncoherent Multiuser Detection for Multi-Antenna Diversity Communications over Rayleigh Fading Channels,” invited talk, 34th Annual Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 2000.
  • M. L. McCloud, M. Brehler, and M. K. Varanasi, “Signal constellations for noncoherent spacetime communications,” Proc. 38th Annual Allerton Conf. on Commun., Control, and Comput., Allerton. IL, Oct. 2000.
  • D. Das and M. K. Varanasi, “Blind algorithms for joint optimization of multiuser receivers and power control,” Proc. 38th Annual Allerton Conf. on Commun., Control, and Comput., Allerton. IL, Oct. 2000.
  • M. K. Varanasi, “Bandwidth Efficient Multiple-Access Communications” (no publication) The IEEE Commun. Th. Workshop, Haines City, Florida, May 2000.
  • M. K. Varanasi and T. Guess, “On Signal Design in Multiuser Communications,” Proc. of IRSS 2000: Interference Rejection and Signal Separation in Wireless Communications, New Jersey Institute of Technology, pp. 308-332, March14,2000.
  • M. K. Varanasi, “Nonlinear Multiuser Receivers with Distributed Power Control in Cellular Radio Networks,” 37th Annual Allerton Conf. on Commun., Control, and Comput., Allerton. IL, Sept. 1999.
  • M. K. Varanasi, “Stochastic Power Control for Nonlinear Multiuser Receivers in Cellular Radio Networks,” IEEE Inform. Th. Workshop, Kruger Ntnl. Park, S. Africa, June 1999.
  • M. K. Varanasi and T. Guess, “Bandwidth Efficient Multiple-Access (BEMA): Signal Design with a Strict Bandwidth Criterion Under Quality of Service Constraints,” Proc. International Symposium on Signals, Systems and Electronics (ISSSE ’98), pp.146-151, Pisa, Italy, Sep. 29-Oct. 2, 1998.
  • M. K. Varanasi and Eric A. Fain, “Optimum Signal Design and Power Control for Multiuser Wireless Communications under Location-Invariant Bandwidth Constraints,” 36th Annual Allerton Conf on Communication, Control and Computing, Monticello, IL, pp. 556-565, Sept. 1998.
  • M. K. Varanasi and T. Guess, “Optimum Decision Feedback Multiuser Equalization with Successive Decoding Achieves the Total Capacity of the Gaussian Multiple-Access Channel,” Proc. 31st Annual Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 1997.
  • M. K. Varanasi, “Noncoherent Multiuser Detection,” an invited tutorial (no publication), 1996IEEE Communication Theory Workshop, Destin, Florida, April 1996.
  • M. K. Varanasi, “Multiuser Detection in Frequency-Selective Rayleigh Fading Channels: A Unified Approach to Design and Succinct Eigenbounds on Performance: Part I,” The Annual Allerton Conf. on Communication, Control, and Computing, Oct 4-6, 1995 pp. 11-20.
  • M. K. Varanasi, “Multiuser Detection in Frequency-Selective Rayleigh Fading Channels: A Unified Approach to Design and Succinct Eigenbounds on Performance: Part II,” The Annual Allerton Conf on Communication, Control, and Computing, Oct 4-6, 1995 pp. 1053-1062.
  •  M. K. Varanasi, “Group Sequence Detection: Bridging the Yawning Gap Between Linear and Optimum Multiuser Detection,” Inform. Th. Workshop on Information Theory, Multiple-Access and Queueing, St. Louis, MO, April 1995.
  •  M. K. Varanasi and B. Aazhang, “Probability of Error Comparison of Linear and Iterative Multiuser Detectors,” Advances in Communications and Control Systems, ComCon 88, Baton Rouge, LA (Oct 1988), pp. 15-25.

Conference Publications

  • Y. Pang and M. K. Varanasi, ”Bounds on the Capacity Region of the Three-User One-to-Three MIMO Interference Channel” IEEE International Symposium on Information Theory (ISIT), 2018, Vail, CO.
  • M. Salman and M. K. Varanasi, ”The Capacity Region of the Three-Receiver Less Noisy Broadcast Channel With Message Cognition”, IEEE International Symposium on Information Theory (ISIT) 2018, Vail, CO.
  • M. Salman and M. K. Varanasi, ”An Achievable Rate Region for the K-Receiver Two Nested Groupcast DM Broadcast Channel and a Capacity Result for the Combination Network”, IEEE International Symposium on Information Theory (ISIT) 2018, Vail, CO.
  • M. Salman and M. K. Varanasi, ”A New Approach to Linear Degrees of Freedom: the MIMO Broadcast Channel with Hybrid CSIT” IEEE International Symposium on Information Theory (ISIT) 2018, Vail, CO.
  • M. Salman and Mahesh K. Varanasi. “On the Capacity Region of the K-User Discrete Memoryless Broadcast Channel with Two Degraded Messages” IEEE International Symposium on Information Theory (ISIT) 2017.
  • H. P. Romero and Mahesh K. Varanasi. “Rate Splitting and Superposition Coding for Concurrent Groupcasting over the Broadcast Channel: A General Framework” IEEE International Symposium on Information Theory (ISIT) 2017.
  • H. P. Romero and Mahesh K. Varanasi. “Superposition coding in the combination network.” IEEE International Symposium on Information Theory (ISIT) 2016, pp. 2149-2153.
  • H. P. Romero and M. K. Varanasi, ”Polymatroid structure in the multiple access channel with general message sets,” IEEE Intnl. Symp. Inform. Th., Hongkong, China, Jun. 2015.
  • K. Mohanty and M. K. Varanasi, “The degrees of freedom of the 3-user MIMO cyclic Z-interference channel with perfect and delayed CSIT,” IEEE Intnl. Symp. Inform. Th., Hongkong, China, Jun. 2015.
  • Y. Wang and M. K. Varanasi, “Degrees of Freedom Region of the MIMO Two-Transmit, Two-Receive Network with General Message Sets,” IEEE Intnl. Symp. Inform. Th., Hongkong, China, Jun. 2015.
  • S. Karmakar and M. K. Varanasi, “The Diversity Multiplexing Tradeoff of the Half-Duplex Relay Network,” IEEE Information Theory Workshop (2014 ITW), Hobart, Tasmania, Australia, 2-5 November 2014, pp. 661-665.
  • S. Karmakar and M. K. Varanasi, “Capacity region of a class of strong MIMO IC”, 48th Annual Conference on Information Sciences and Systems (CISS), March, 2014, pp. 1-6.
  • Y. Pang and M. K. Varanasi, “Bounds on the Capacity Region of a Class of Interfering Multiple Access Channels,” 51st Allerton Conf. Commun. Cntrl. Comput. Oct. 2-4, 2013.
  • H. P. Romero and M. K. Varanasi, “Approximate Capacity of the Fading MIMO MAC with Common Information”, 51st Allerton Conf. Commun. Cntrl. Comput. Oct. 2-4, 2013.
  • H. P. Romero and M. K. Varanasi, “Capacity of the K-user Discrete Memoryless Multiple Access Channel with Common Information and with or without State,” 51st Allerton Conf. Commun. Cntrl. Comput. Oct. 2-4, 2013.
  • S. Karmakar and M. K. Varanasi, “The Generalized Multiplexing Gain Region of the Slow Fading MIMO Interference Channel and its Achievability with Limited Feedback,” ISIT 2012, Boston, MA, Jul 2012.
  • C. S. Vaze and M. K. Varanasi, “The Degrees of Freedom of the 2×2×2 Interference Network with Delayed CSIT and with Limited Shannon Feedback,” Proc. 49th Allerton Conf. Commun. Cntrl. Comput. Sept. 2011.
  • C. S. Vaze and M. K. Varanasi, “Can Feedback Increase the Degrees of Freedom of a Wireless Network with Delayed CSIT?” Proc. 49th. Allerton Conf. Commun. Cntrl. Comput. Sept. 2011.
  • S. Karmakar and M. K. Varanasi, “Capacity of the MIMO Interference Channel to Within a Constant Gap,” Proc. IEEE Intnl. Symp. Inform. Th., St. Petersberg, Russia, Aug. 2011.
  • C. S. Vaze and M. K. Varanasi, “The Capacity Region of the Symmetric Gaussian Interference Channel with Common Information to within a Constant Gap,” Proc. IEEE Intnl. Symp. Inform. Th., St. Petersberg, Russia, Aug. 2011.
  • C. S. Vaze and M. K. Varanasi, “The Degrees of Freedom Region of the Two-User MIMO Broadcast Channel with Delayed CSIT,” Proc. IEEE Intnl. Symp. Inform. Th., St. Petersberg, Russia, Aug. 2011.
  • C. S. Vaze and M. K. Varanasi, “On Completing the Degrees of Freedom Characterization of MIMO Interference Networks with No CSIT,” Proc. IEEE Intnl. Symp. Inform. Th., St. Petersberg, Russia, Aug. 2011.
  • R. T. Krishnamachari and M. K. Varanasi, “MIMO Performance under Covariance Matrix Feedback,” Proc. IEEE Intnl. Symp. Inform. Th., St. Petersberg, Russia, Aug. 2011.
  • S. Karmakar and M. K. Varanasi, “The Generalized Degrees of Freedom of the MIMO Interference Channel,” Proc. IEEE Intnl. Symp. Inform. Th., St. Petersberg, Russia, Aug. 2011.
  • C. S. Vaze and M. K. Varanasi, “The Degrees of Freedom Region of the MIMO Interference Channel with Delayed CSIT,” Proc. IEEE Intnl. Symp. Inform. Th., St. Petersberg, Russia, Aug. 2011.
  •  C. S. Vaze, S. Karmakar and M. K. Varanasi, “On the Generalized Degrees of Freedom Region of the MIMO Interference Channel with No CSIT,” Proc. IEEE Intnl. Symp. Inform. Th., St. Petersberg, Russia, Aug. 2011.
  • R. T. Krishnamachari and M. K. Varanasi, ”Interference Alignment Under Limited Feedback for MIMO Interference Channels,” IEEE ISIT, Austin, TX, Jun. 2010, pp. 522 - 526.
  • R. T. Krishnamachari and M. K. Varanasi, ”Finite-Rate Feedback of Input Covariance Matrices in MIMO Systems” IEEE ISIT, Austin, TX. Jun. 2010, pp. 2343 - 2347.
  • S. Karmakar and M. K. Varanasi, “On the Diversity-Multiplexing Tradeoff of the MIMO ZInterference Channel,” IEEE ISIT, Austin, TX, Jun. 2010.
  • S. Karmakar and M. K. Varanasi, ”The Diversity-Multiplexing Tradeoff of the symmetric MIMO 2-User Interference Channel,” Proc. IEEE ISIT, Austin, TX, Jun. 2010, pp. 2213 - 2217.
  • S. Karmakar and M. K. Varanasi, “The Diversity-Multiplexing-Tradeoff of the Symmetric MIMO Half-Duplex Relay Channel,” IEEE ISIT, Austin, TX, Jun. 2010, pp. 2178 - 2182.
  • C. S. Vaze and M. K. Varanasi, “The Degrees of Freedom Region of the MIMO Cognitive Interference Channel with No CSIT,” IEEE ISIT, Austin, TX, Jun. 2010, pp. 440-444.
  • C. S. Vaze and M. K. Varanasi, “CSI feedback scaling rate vs multiplexing gain tradeoff for DPC-based transmission in the Gaussian MIMO broadcast channel,” IEEE ISIT, Austin, TX, Jun. 2010, pp. 2353 - 2357.
  • M. Garg and M. K. Varanasi, ”Diversity-multiplexing-tradeoff-optimal 2-user scheduling in an M-user Gaussian multiple-access channel,” IEEE ISIT, Austin, TX, Jun. 2010, pp. 2198 - 2202.
  • C. S. Vaze and M. K. Varanasi, “A large-system analysis of the imperfect-CSIT Gaussian broadcast channel with a DPC-based transmission strategy,” 44th Annual Conference on Information Sciences and Systems (CISS), 17-19 March 2010, pg. 1-5.
  • S. Karmakar and M. K. Varanasi, “Diversity-Multiplexing-Delay Tradeoff of a DDF Protocol on a Half-Duplex ARQ Relay Channel,” Proc. Annual Asilomar Conf. on Signals, Systems and Computers, Pacific Grove, CA, Oct. 2009.
  • S. Karmakar and M. K. Varanasi, “Optimal DMT of Dynamic Decode-and-Forward Protocol on a Half-Duplex Relay Channel With Arbitrary Number of Antennas at Each Node,” Proc. Annual Asilomar Conf. on Signals, Systems and Computers, Pacific Grove, CA, Oct. 2009.
  • C. S. Vaze and M. K. Varanasi, “Dirty Paper Coding for the MIMO Cognitive Radio Channel with Imperfect CSIT,” Proc. IEEE Intnl. Symp. Inform. Th., Seoul, S. Korea, June, 2009, pp. 2532- 2536.
  • S. Karmakar and M. K. Varanasi, “Diversity multiplexing gain tradeoff of the dynamic decode and forward protocol on a MIMO half-duplex relay channel”, Proc. IEEE Intnl. Symp. Inform. Th., Seoul, S. Korea, June, 2009, pp 1443-1447.
  • R. T. Krishnamachari and M. K. Varanasi “Distortion-Rate Tradeoff of a Source Uniformly Distributed over the Composite PF(N) and the Composite Stiefel Manifolds,” Proc. IEEE Intnl. Symp. Inform. Th., Seoul, S. Korea, June, 2009, pp 522-526.
  • C. S. Vaze and M. K. Varanasi, “On the achievable rate of the fading dirty paper channel with imperfect CSIT,” Proc. 43rd Annual Conf. Inform. Sc & Systems (CISS’09), Johns Hopkins Univ. Baltimore, MD, March 2009.
  • M. Garg and M. K. Varanasi, “On the diversity-multiplexing tradeoff of the Gaussian MIMO broadcast channel,” Proc. 43rd Annual Conf. Inform. Sc & Systems (CISS’09), Johns Hopkins Univ. Baltimore, MD, March 2009.
  • S. Karmakar and M. K. Varanasi, “On the rate versus ML-decoding complexity tradeoff of square LDSTBCs with unitary weight matrices,” Global Telecommunications Conference, IEEE GLOBECOM ’08, New Orleans, LA, Nov-Dec. 2008.
  • R. T. Krishnamachari and M. K. Varanasi “Distortion-Rate Tradeoff of a Source Uniformly Distributed over Positive Semi-Definite Matrices,” Proc. Annual Asilomar Conf. on Signals, Systems and Computers, Pacific Grove, CA, Oct. 2008.
  • C. S. Vaze and M. K. Varanasi “Dirty Paper Coding for Fading Channels with Partial Transmitter Side Information,” Proc. Annual Asilomar Conf. on Signals, Systems and Computers, Pacific Grove, CA, Oct. 2008.
  • R. T. Krishnamachari and M. K. Varanasi “Volume of Geodesic Balls in the Complex Stiefel Manifold” Proc. 46th Annual Allerton Conf. on Commun., Control, and Comput., Allerton. IL, Sept. 2008.
  • M. Garg and M. K. Varanasi, “The parallel channel with ordered gains: a high SNR analysis,” Proc. IEEE Intnl. Symp. Inform. Th., Toronto, Canada, Jul., 2008, pp. 2568 - 2572.
  • Y. Liu, M. K. Varanasi and H. Xinming, “Power Scheduling for MIMO Relay Channels Employing Rateless Codes,” Proc. IEEE International Conference on Communications (ICC ’08) May 19-23, 2008 Pp. 4431 - 4435.
  • R. T. Krishnamachari and M. K. Varanasi “Volume of Small Balls in the Real Stiefel Manifold,” Proc. 42nd Annual Conf. Inform. Sc & Systems (CISS’08), Princeton Univ. Princeton, NJ, March 2008, pp. 402 - 406.
  • M. Garg and M. K. Varanasi, “The optimality of D-BLAST-ZF with antenna order feedback without or with antenna selection,” Proc. 42nd Annual Conf. Inform. Sc & Systems (CISS’08), Princeton Univ. Princeton, NJ, March 2008, pp. 1120 - 1124.
  • S. G. Srinivasan and M. K. Varanasi, “Optimal Noncoherent MIMO-OFDM Constellations at Low SNR” Annual Asilomar Conf. on Signals, Systems and Computers, Nov 2007.
  • Y. Jiang and M. K. Varanasi, “Extended Uniform Channel Decomposition for MIMO Communications with Intersymbol Interference” Proc. Annual Asilomar Conf. on Signals, Systems and Computers, Nov 2007.
  • Y. Jiang and M. K. Varanasi, “Decision Feedback Based Transceiver Optimization for MIMO Inter-Symbol Interference Channels” Proc. Annual Asilomar Conf. on Signals, Systems and Computers, Nov 2007.
  • H. Venkatachari and M. K. Varanasi, ”Maximizing mutual information in general MIMO fading AWGN channels under a rank constraint,” Proc. Annual Asilomar Conf. on Signals, Systems and Computers, Nov 2007.
  • Yi Jiang and Mahesh K. Varanasi, “The effect of ordered detection and antenna selection on diversity gain of decision feedback detector,” Proc. IEEE Intnl Conf. Commun. Glasglow, Scotland, June 2007.
  • Y. Jiang and M. K. Varanasi, “Diversity-Multiplexing Tradeoff of MIMO Systems with Antenna Selection,” Proc. IEEE Intnl Symp. Inform Th. (ISIT’07), Nice, france, June 2007.
  • S. G. Srinivasan and M. K. Varanasi, ”Mutual Information Optimal Constellations for the Low SNR Noncoherent MIMO Rayleigh Fading Channel,” Proc. IEEE Intnl Symp. Inform. Th. (ISIT’07), Nice, france, June 2007.
  • Y. Jiang and M. K. Varanasi, “Precoder optimization for nonlinear MIMO transceiver for arbitrary cost function,” Proc. Conf Inform. Sc & Systems (CISS’07), Johns Hopkins Univ, Baltimore, MD, Mar 2007.
  • Y. Liu, B. Xu and M. K. Varanasi, “On Discrete Memoryless Relay Channels with Designable Transmitter Side Information,” Proc Conf. Inform. Sc. Systems, Johns Hopkins Univ., Balitmore, MD, March 2007.
  • H. Venkatachari and M. K. Varanasi, “Optimum signature sequences that maximize sum capacity in fading CDMA channels,” Proc. Conf. Inform. Sc & Systems (CISS’07), Johns Hopkins Univ. Baltimore, MD, March 2007.
  • S. G. Srinivasan and M. K. Varanasi “STORM : Optimal Constellations for the Low SNR Noncoherent MIMO Fading Channel” Proc. 44th Annual Allerton Conf. Communications, Control and Computing, Monticello, IL, Sept. 2006.
  • N. Prasad, M. K. Varanasi, “High performance static and dynamic cooperative communication protocols for the half-duplex fading relay channel,” IEEE Global Telecommunications Conference, IEEE GLOBECOM ’06, Nov. 2006.
  • Y. Jiang and M. K. Varanasi, “Diversity-Multiplexing Tradeoff of GMD/UCD with Antenna Selection,” Annual Asilomar Conf. on Signals, Systems and Computers, Nov 2006.
  • N. Prasad and M. K. Varanasi, “MIMO Throughput in the High SNR Regime,” Proc. IEEE Intnl Symp. Inform. Th., Seattle, WA. Jul. 2006.
  • S. G. Srinivasan and M. K. Varanasi, “Constellation Design for the Noncoherent MIMO Rayleigh Fading Channel at General SNR,” Proc. IEEE Intnl Symp. Inform. Th., Seattle, WA. Jul. 2006.
  • D. Grant and M. K. Varanasi, “Number Theoretic Aspects of Space-Time Codes” American Mathematical Society (AMS) Meeting, San Francisco, CA, July, 2006.
  • Y. Jiang and M. K. Varanasi, “A novel spatial multiplexing architecture with finite rate feedback,” Proc. 40th Annual Conf. Inform. Sciences and Systems, Princeton Univ., Princeton, NJ Mar 2006.
  • P. Vajapeyazula and M. K. Varanasi, ”The Simple Relay Channel: Optimum Resource Allocation and Capacity”, Annual Asilomar Conf. on Signals, Systems and Computers, Nov 2005.
  • D. Grant and M. K. Varanasi, “Weight enumerators and a McWilliams-type identity for finite rank space-time codes over finite fields,” Proc. Annual Allerton Conf Communication, Control and Computing, Monticello, IL, Oct 2005.
  • N. Prasad, M. K. Varanasi, “Outage Theorems for MIMO Channels,” Proc. 43rd Annual Allerton Conf. Communications, Control and Computing, Monticello, IL, Oct 2005.
  • N. Prasad and M. K. Varanasi, “MIMO Outage Capacity in the High SNR Regime,” IEEE Intnl Symp. Inform. Th., Adelaide, Australia, Page(s):656 - 660 Sept. 2005.
  • S. G. Srinivasan and M. K. Varanasi, “Code Design for the Low SNR Noncoherent MIMO Block Rayleigh Fading Channel,” IEEE Intnl Symp. Inform. Th., Adelaide, Australia, Page(s):2218 - 2222 Sept. 2005.
  • S. G. Srinivasan and M. K. Varanasi, “Code design with unequal priors and new distance criteria for the low SNR noncoherent rayleigh fading channel,” Proc. 39th Annual Conf. Inform. Sciences and Systems, Johns Hopkins Univ., Mar 2005.
  • P. Dayal and M. K. Varanasi, “Diversity Multiplexing Tradeoff for QAM Based Multiuser Cooperation Strategies,” Proc. 39th Annual Conf. Inform. Sciences and Systems, Johns Hopkins Univ., Mar 2005.
  • P. Dayal and M. K. Varanasi, “A QAM Space-Time Block Coded Cooperation Strategy and its Performance Analysis,” Proc. IEEE Inform. Th. Workshop, San Antonio, Tx, Oct, 2004.
  • A. Kapur, C. T. Mullis and M. K. Varanasi, “On the Limitation of Linear MMSE Detection,” Proc. Intl Symp Inform. Th. Appls. (ISITA 2004), Parma, Italy, Oct, 2004.
  • N. Prasad and M. K. Varanasi, “Outage Capacities of Space-Time Architectures,” Proc. IEEE Inform. Th. Workshop, San Antonio, Tx, Oct, 2004.
  • F. Bandiera, G. Ricci and M. K. Varanasi, “Blind Multiuser Detection for a Multi-Satellite DS/CDMA System,” Proc. 5th IEEE Workshop on Signal Processing Advances in Wireless Communications, Lisboa, Portugal, Jul 2004.
  • P. Dayal, S. G. Srinivasan and M. K. Varanasi, “Diversity Analysis of Training Codes for MIMO Block Fading Channels,” 2004 Proceedings of International Symposium on Information Theory,ISIT 2004, 27 June-2 July 2004 Pgs:408 - 408.
  • N. Prasad and M. K. Varanasi, “Diversity and Multiplexing Tradeoff Bounds for Cooperative Diversity Schemes,” Proceedings of International Symposium on Information Theory,ISIT 2004, 27 June-2 July 2004 Pgs:268 - 268.
  • A. Kapur and M. K. Varanasi, “A Max-Min Fair Approach to Optimize the CDMA Capacity Region,” 2004 Proceedings of International Symposium on Information Theory,ISIT 2004, 27 June-2 July 2004 Pgs:435 - 435.
  • M. McCloud and M. K. Varanasi, “Time-Limited and Bandwidth Constrained Signal Design for the Fast Fading Noncoherent MIMO Channel,” 2004 IEEE International Conference on Communications, Vol: 6 ,20-24 June 2004, Pgs:3168 - 3172.
  • A. Kapur, M. K. Varanasi and C. T. Mullis, “On the Limitation of Generalized Welch Bound Equality Signals under Linear MMSE Detection,” Proc. 38th Annual Conf. Inform. Sciences and Systems, Princeton University, NJ, Mar.2004.
  • P. Dayal and M. K. Varanasi, “Algebraic space-time codes with full diversity and low peak-to-mean power ratio,” Global Telecommunications Conference, IEEE GLOBECOM ’03, Vol: 4 ,Dec. 2003, Pgs:1946 - 1951.
  • N. Prasad and M. K. Varanasi, “Outage analysis and optimization of a stacked orthogonal spacetime architecture and near-outage codes,” Global Telecommunications Conference, IEEE GLOBECOM ’03, Vol: 4 ,Dec. 2003, Pgs:1903 - 1908.
  • P. Dayal and M. K. Varanasi, “An optimal two transmit antenna space-time code,” The Thrity-Seventh Asilomar Conference on Signals, Systems & Computers, 2003, Vol: 1 ,9-12 Nov. 2003 Pgs:987 - 991.
  • N. Prasad and M. K. Varanasi, “Outage analysis and optimization of the multiaccess/V-BLAST architecture over MIMO block Rayleigh fading channels,” 41st Annual Allerton Conf. on Comm. Control, and Comput., Monticello, IL, Oct., 2003.
  •  P. Dayal and M. K. Varanasi, “A fast generalized sphere decoder for underdetermined MIMO systems,” 41st Annual Allerton Conf. on Comm. Control, and Comput., Monticello, IL, Oct., 2003.
  • A. Kapur and M. K. Varanasi, “On Maximizing Symmetric Capacity via Signal Design in CDMA Systems .” Proc. Intnl. Symp. Inform. Th. (ISIT), Yokohama, Japan, July 2003.
  • A. Kapur and M. K. Varanasi, “Signal Design for Bandwidth Efficient Multiple Access with Guaranteed Bit Error Rate,” IEEE International Conference on Communications, ICC 2003 Vol: 4,11-15 May 2003 Pgs:2504 - 2508
  • A. Kapur and M. K. Varanasi, “Improved Signal Design for Bandwidth Efficient Multiple Access,” Proc. IEEE Inform. Th. Workshop, Paris, France, April 2003.
  • M. Brehler and M. K. Varanasi, “Training codes for the multi-antenna block Rayleigh fading channel,” Proc. 37th Annual Conf. Inform. Sciences and Systems, Johns Hopkins University, Baltimore, MD, Mar.2003.
  • A. Kapur and M. K. Varanasi, “On the limitation of linear MMSE detection and (generalized) WBE signals,” Proc. 37th Annual Conf. Inform. Sciences and Systems, Johns Hopkins University, Baltimore, MD, Mar.2003.
  • N. Prasad and M. K. Varanasi, “Optimizing the Performance of D-BLAST Lattice Codes for MIMO Fading Channels”, Proc. IEEE Intl. Conf. Personal Wireless Communications (ICPWC’02), New-Delhi, India, Dec.2002.
  • F. Bandiera, G. Ricci and M. K. Varanasi, “Blind Multiuser Detection Over Highly-Dispersive CDMA Channels in the Presence of Diversity Reception,” Proc. Asilomar Conf. on Signals, Systems and Computers, Monterey, CA, Nov.2002.
  • N. Prasad and M. K. Varanasi, “D-BLAST Lattice Codes for MIMO Block Rayleigh Fading Channels”, 40th Annual Allerton Conf. on Comm. Control, and Comput., Monticello, IL, Oct., 2002.
  • P. Dayal and M. K. Varanasi, “An Improved Algebraic Family of Complex Lattices for Single Transmit Antenna Rayleigh Fading with Application to Universal Space-Time Codes,” 40th Annual Allerton Conf. on Comm. Control, and Comput., Monticello, IL, Oct., 2002.
  • N. Prasad and M. K. Varanasi, “Decision Feedback Detection Using Modulation Constraints for MIMO Rayleigh Fading Channels,” Proc. IEEE Intl. Symposium on Inform. Theory, Lausanne, Switzerland, Jul. 2002.
  • M. Brehler and M. K. Varanasi, “Spectrally Efficient Multiuser Space-Time Modulation,” Proc. IEEE Intl. Symposium on Inform. Theory, Lausanne, Switzerland, Jul. 2002.
  • N. Prasad and M. K. Varanasi, “Optimum Efficiently Decodable Layered Space-Time Block Codes”, Proc. Asilomar Conf. on Signals, Systems and Computers, Monterey, CA, Nov.2001.
  • N. Prasad and M. K. Varanasi, “Analysis of Decision Feedback Detection for MIMO Rayleigh Fading Channels and Optimum Allocation.of Transmitter Powers and QAM Constellations”, 39th Annual Allerton Conf. on Comm. Control, and Comput., Monticello, IL, Oct., 2001.
  • A. Kapur and M. K. Varanasi, “On Multiuser Detection for Low-Rank CDMA Systems,” 39th Annual Allerton Conference on Comm., Control and Comput., Monticello, IL, Oct.2001.
  • M. Brehler and M. K. Varanasi, “Low-Dimensional Spreading Matrices for Multiuser Space-Time Modulation,” Proc. of the IEEE Inform. Th. Workshop, Cairns, Australia, Sept. 2001.
  • M. Brehler and M. K. Varanasi, “Coherent Multiuser Space-Time Communications: Optimum Receivers and Code Design Criteria,” 35th Annual Conf. Inform. Sciences and Systems, Johns Hopkins University, Baltimore, MD, Mar.2001.
  • M. Brehler and M. K. Varanasi, “Noncoherent Multiuser Space-Time Communications: Optimum Receiver and Signal Design,” 35th Annual Conf. Inform. Sciences and Systems, Johns Hopkins University, Baltimore, MD, Mar.2001.
  • M. L. McCloud, A. Russ, L. L. Scharf and M. K. Varanasi, “Noncoherent Interference-Nulling Multi-user Detection with Antenna Arrays Over Fading Channels,” 35th Annual Conf. Inform. Sciences and Systems, Johns Hopkins University, Baltimore, MD, Mar.2001.
  • D. Das and M. K. Varanasi, “Stochastic Power Control with Averaging,” Proc. IEEE Intl. Conf. Personal Wireless Communications (ICPWC’00), Hyderabad, India, Dec.2000.
  • M. Brehler and M. K. Varanasi, “Optimum Noncoherent Multiuser Detection for DPSK Modulation in Generalized Diversity Rayleigh Fading Channels: An Asymptotic Minimum Error Probability Analysis,” Proc. Commun. Th. Mini-Conf., IEEE GLOBECOM, San Francisco, CA, Nov.2000.
  • T. Guess and M. K. Varanasi, “A Comparison of Signal Design Methods for Correlated Waveform Multiple-Access Communications,” 38th Annual Allerton Conference on Commun., Control and Comput., Monticello, IL, Oct.2000.
  • D. Das and M. K. Varanasi, “Blind Adaptive Multiuser Detection with Averaging for Cellular Systems,” IEEE Intnl. Symp. on Inform. Th. (ISIT’2000), Sorrento, Italy, June2000.
  • E. A. Fain and M. K. Varanasi, “Minimum Bandwidth Basis Functions for the Fourth-Moment Bandwidth Measure,” IEEE Intnl. Symp. on Inform. Th. (ISIT’2000), p. 416, Sorrento, Italy, June2000.
  • T. Guess and M. K. Varanasi, “A New Succcessively Decodable Coding Technique for Intersymbol Interference Channels,” IEEE Intnl. Symp. on Inform. Th. (ISIT’2000), p.102, Sorrento, Italy, June2000.
  • M. K. Varanasi and M. L. McCloud, “Complex Spherical Modulation for Noncoherent Communications,” IEEE International Symposium on Information Theory (ISIT’2000), p. 163, Sorrento, Italy, June2000.
  • T. Guess and M. K. Varanasi, “Deriving Optimal Successive Decoders for the Asynchronous CDMA Channel Using Information Theory”, 34th Annual Conf. Inform. Sciences and Systems, Princeton University, Princeton, NJ, March2000, pp.WP6.11-WP6.16.
  • M. L. McCloud and M. K. Varanasi, “Noncoherent Zero Forcing Equalization for Multipulse Modulation”, 34th Annual Conf. Inform. Sciences and Systems, Princeton University, Princeton, NJ, March2000, pp. FP2.1-FP2.6
  • A. Kapur, D. Das and M. K. Varanasi, “Noncoherent MMSE Multiuser Receivers for Non-Orthogonal Multipulse Modulation and Blind Adaptive Algorithms”, 34th Annual Conf. Inform. Sciences and Systems, Princeton University, Princeton, NJ, March2000, pp.FP3.13-FP3.18.
  • D. Das and M. K. Varanasi, “Blind Adaptive Noncoherent Multiuser Detection for Nonlinear Modulation,” 37th Annual Allerton Conf. on Comm. Control, and Comput., Monticello, IL, Sept. 1999.
  • T. Guess and M. K. Varanasi, “Signal Design for Bandwidth Efficient Multiple-Access (BEMA) Comunication Based on Eigenvalue Optimization” Proc Commun. Th. Mini-Conf, Intnl Commun. Conf. (ICC), Vancouver, BC, Canada, June 1999.
  • G. Ricci and M. K. Varanasi, “Blind Adaptive Multiuser Detection for the L-out-of-K CDMA Channel,” IEEE Vehicular Technology Conference (VTC), Houston, TX, May 1999.
  • A. Russ and M. K. Varanasi, “Optimum Noncoherent Multiuser Detection for Nonlinear Nonorthogonal Modulation Over the Frequency-Selective Rayleigh Fading Channel,” IEEE Intl. Conf. Universal Personal Communications, Florence, Italy, Oct 1998.
  • T. Guess and M. K. Varanasi, “An Information Theoretic Derivation of the MMSE Decision Feedback Equalizer,” 36th Annual Allerton Conf on Communication, Control and Computing, Monticello, IL, pp. 318-327, Sept 1998.
  • M. K. Varanasi, “Noncoherent Equalization for Multipulse Modulation,” Proc. IEEE Personal, Indoor and Mobile Communications Conf., Boston, MA, Sept. 1998.
  • E. A. Fain and M. K. Varanasi, “Error Probability Bound for Reduced Complexity Multiuser Decoding using Orthogonal Decomposability,” Proc. of IEEE Intnl. Symp. on Inform. Theory, p. 341, Aug. 1998.
  • T. Guess and M. K. Varanasi, “Error Exponents for the Gaussian Multiple-Access Channel” Proc. IEEE Intnl. Symp. on Inform. Th., p. 214, Aug. 1998.
  • M. K. Varanasi and Deepak Das, “Noncoherent Decision Feedback Multiuser Detection: Optimality, Performance Bounds, and Rules for Ordering Users,” Proc. of IEEE Intnl. Symp. on Inform. Th., p. 35, Aug. 1998.
  • M. K. Varanasi and D. Das, “Noncoherent Decision Feedback Multiuser Detection for Nonorthogonal Multipulse Detection,” Proc of the Conf. Inform. Sciences and Systems, Princeton University, pp. 230-235, March 1998.
  • M. K. Varanasi and M. Brehler, “A Systematic Approach to Noncoherent Detection for DPSK Modulation in Multiuser Correlated Diversity Rayleigh Fading Channels,” Proc of the Conf. Inform. Sciences and Systems, Princeton University, pp. 236-241, March 1998.
  • M. K. Varanasi, “Equalization for Multipulse Modulation,” Proc. IEEE Intl Conf. Personal Wireless Communications (ICPWC97), Mumbai (Bombay), India, December 1997.
  • M. K. Varanasi and T. Guess, “Bandwidth Efficient Multiple-Access via Signal Design for Decision Feedback Receivers: Towards an Optimal Spreading-Coding Trade-Off,” Proc. Commun. Th. Mini-Conf., IEEE Global Telecomm Conf., pp. 159-165, Phoenix, AZ, Nov. 1997.
  • M. K. Varanasi and T. Guess, “Optimum Decision Feedback Multiuser Equalization with Successive Decoding Achieves the Total Capacity of the Gaussian Multiple-Access Channel,” Proc. 31st Annual Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, pp. 1405-1409, Nov. 1997 (invited).
  • E. Fain and M. K. Varanasi, “Group Metric Decoding for Frequency-Selective Rayleigh Fading Multiple-Access Channels,” Proc. Commun. Th. Mini-Conf., IEEE Global Telecomm Conf., pp. 205-207, Phoenix, AZ, Nov. 1997.
  • A. Russ and M. K. Varanasi, “Noncoherent Multiuser Detection for Nonlinear Modulation: An Asymptotic Analysis of Minimum Probability of Error for the Rayleigh Fading Channel,” Proc. Commun. Th. Mini-Conf., IEEE Global Telecomm Conf., pp. 195-199, Phoenix, AZ, Nov. 1997.
  • A. Russ and M. K. Varanasi, “Minimum Error Probability and Suboptimum Noncoherent Multiuser Detection for Nonlinear Nonorthogonal Synchronous Signaling over a Rayleigh Fading Channel,” Proc. 1997 Intl Conf Universal Personal Communications, Helsinki, Finland, September 1997.
  • M. K. Varanasi, “Asymptotically Optimum Multiuser Decision Feedback Detection,” Proc. 1997 Intl Symp. Inform. Th, pp. 275, Ulm, Germany, June-July 1997.
  • M. K. Varanasi and T. Guess, “Achieving Vertices of the Capacity Region of the Synchronous Gaussian Correlated-Waveform Multiple-Access Channel with Decision Feedback Receivers,” Proc ISIT’97, Ulm, Germany, June 1997.
  • M. K. Varanasi and A. Russ, “Noncoherent Decorrelative Multiuser Detection for Nonlinear Nonorthogonal Modulation,” Proc. Intnl. Conf. Commun., ICC’97, Montreal, Canada, June 1997.
  • M. K. Varanasi, “Optimizing Symmetric Energy and Permuting Users for Multiuser Decision Feedback Detection to User-Wise Outperform Linear Multiuser Detection,” Proc. Conf. Inform. Sc. Systems, CISS’97, Johns Hopkins University, March 1997.
  • M. K. Varanasi, “A Systematic Approach to Optimum Noncoherent Detection for DPSK Modulation in Single-User Rayleigh Fading Correlated Diversity Channels with Applications to Post-Combining Decorrelative Multiuser Detection,” Proc. Conf. Inform. Sc. Systems, CISS’97, Johns Hopkins University, March 1997.
  • T. Guess and M. K. Varanasi, “Multiuser Decision-Feedback Receivers for the General Gaussian Multiple-Access Channel,” Proc. of the Annual Allerton Conf. on Communication, Control, and Computing, October, 1996.
  • S. Vasudevan, J. Horne and M. K. Varanasi, “Reliable Wireless Telephony over the 2.4 GHz ISM Band: Issues and Solutions,” Proceedings of the IEEE Fourth International Symposium on Spread Spectrum Techniques and Applications (ISSSTA ’96), pp. 790-794, Mainz, Germany, Sept. 22-25, 1996.
  • M. K. Varanasi, “Power Control for Multiuser Detection,” 1996 Conf on Information Sciences and Systems, Princeton University, pp. 866-873, March 1996.
  • T. Guess and M. K. Varanasi, “Onion Peeling for CDMA–Symmetric Rate Under RMS Bandwidth Constraints,” 1996 Conf on Information Sciences and Systems, Princeton University, pp. 584-589, March 1996.
  • M. K. Varanasi, “Delayed Decision Feedback Equalization,” Proc. IEEE Int Symp on Information Theory, Whistler, B.C. Canada, September 1995.
  • M. K. Varanasi, “Group Sequence Detection for Asynchronous Gaussian Code-Division Multiple Access Channels,” Conf Record of the Comm Theory Mini-Conf, GLOBECOM, ’94 pp. 136-140, San Francisco, CA Nov 27-Dec 1, 1994.
  • E. A. Fain and M. K. Varanasi, “Cyclic Decision Feedback Multiuser Sequence Detection,” Proc 32nd Annual Allerton Conf on Communication, Control, and Computing, Sep 28-30, 1994.
  • M. K. Varanasi, “Subsequence Detection,” Proc IEEE Int Symp on Information Theory, pp. 358, Trondheim, Norway, June 1994.
  • S. Vasudevan and M. K. Varanasi, “Receivers for CDMA Communications over Time-Varying Rayleigh Fading Channels,” Conf Record of the Comm Theory Mini-Conf, GLOBECOM, ’93 vol. 4, Nov 29-Dec 2, 1993, pp. 60-64.
  • M. K. Varanasi, “Group Detection for Synchronous CDMA Communication Over Frequency Selective Fading Channels,” Proc 31st Annual Allerton Conf on Communication, Control, and Computing, Sep 29-Oct 1, 1993, pp. 849-858.
  • S. Vasudevan and M. K. Varanasi, “Fading Resistant Multiuser Detection Over CDMA Fading Channels,” Volume 1 of the Conf Record of IEEE Int Conf Commun, ICC’93, Geneva, Switzerland, pp137-141.
  • S. Vasudevan and M. K. Varanasi, “Multiuser Detection over Synchronous CDMA Fading Channels with Memory,” Proc. of the 26th Conf. Inform. Sc. Systems, pp. 312-317, Johns Hopkins University, March 1993.
  • M. K. Varanasi, “Reduced State Sequence Detection in Asynchronous Gaussian Multiple-Access Channels,” Proc IEEE Int Symp on Information Theory, San Antonio, TX (Jan 1993), pg. 42.
  • D. Parsavand and M. K. Varanasi, “Optimally Orthogonal Signal Design under RMS Bandwidth Constraints,” Proc IEEE Int Symp on Information Theory, San Antonio, TX (Jan 1993), pp. 374.
  • S. Vasudevan and M. K. Varanasi, “Multiuser Detectors for Asynchronous CDMA Communication over Rician Fading Channels,” Proc Comm Theory Mini-Conf, GLOBECOM, ’92, Orlando, FL (Dec 1992), pp. 77-81.
  • M. K. Varanasi, “Group Detection in QAM Synchronous CDMA Channels,” Proc of the 1992 Conf on Information Sciences and Systems, Princeton University, Princeton, NJ (March 1992), pp. 820-826.
  • S. Vasudevan and M. K. Varanasi, “Multiuser Detectors for Rician Fading CDMA Channels,” Proc 29th Annual Allerton Conf on Communication, Control, and Computing, University of Illinois-Urbana (Oct 1991) pp. 400-409.
  • M. K. Varanasi, “Noncoherent Detection in Asynchronous CDMA Channels,” Proc 25th Annual Conf on Information Sciences and Systems, Johns Hopkins University, Baltimore, MD (March 1991), pp. 534–539.
  • M. K. Varanasi and S. Vasudevan, “Multiuser Detectors for Ricean Fading Synchronous CDMA Communication,” Proc 25th Annual Conf on Information Sciences and Systems, Johns Hopkins University, Baltimore, MD (March 1991), pg. 540.
  • M. K. Varanasi and B. Aazhang, “Multiuser Detection in Synchronous DPSK Code-Division Multiple-Access Systems,” Proc 23rd Annual Conf Information Sciences and Systems, pp. 345, Baltimore, MD (March 1989).
  • B.-P. Paris, G. Orsak, M. K. Varanasi, and B. Aazhang, “Neural Net Receivers in Spread-Spectrum Multiple-Access Communication Systems,” Advances in Neural Information Processing Systems (San Mateo, CA: Morgan-Kaufmann, 1988).
  • M. K. Varanasi and B. Aazhang, “Near-Optimum Demodulation for Coherent Communications in Asynchronous Gaussian CDMA Channels,” Proc 22nd Princeton Conf on Information Sciences and Systems (March 1988), pp. 832–839.
  • M. K. Varanasi and B. Aazhang, “Parameter Estimation for the Generalized Gaussian Noise Model,” Proc 24th Allerton Conf on Commun, Control and Computing, Urbana, IL (Oct 1986), pp. 92–101.