Wireless Communication and Sensornets Laboratory

Department of Electrical and Computer Engineering
University of California, Santa Barbara

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Books

Upamanyu Madhow, Fundamentals of Digital Communication, to be published by Cambridge University Press, February 2008.

Book Chapters

G. Barriac, N. Jacobsen, U. Madhow,"The role of feedback, CSI and coherence in MIMO systems," in Space-Time Wireless Systems: from Array Processing to MIMO Communications, edited by H. Bolcskei, D. Gesbert, C. Papadias, A. J. van der Veen, Cambridge University Press, 2006.

Theses

Raghuraman Mudumbai, Energy Efficient Wireless Communication using Distributed Beamforming, Ph.D. Thesis, 2007
Bharath Ananthasubramanyam, Imaging Sensor Nets: Scalable architectures for data collection and localization in sensor networks, Ph.D. Thesis, 2007
Noah Jacobsen, Bayesian approaches to noncoherent communication: from Shannon theory to practical architectures, Ph.D. Thesis, 2005
Kristopher Bruvold, Cross-Layer Design for Efficient Wireless Medium Access Using Adaptive Multiuser Detection, Ph.D. Thesis, 2005

Back to Publications

Journal Articles

mm-wave (60 GHz) networks

S. Singh, R. Mudumbai and U. Madhow, Interference analysis for highly directional 60 GHz mesh networks: the case for rethinking medium access control, IEEE/ACM Trans. Networking, 2011.

Directional MAC design

S. Singh, F. Ziliotto, U. Madhow, E. M. Belding and M. Rodwell, Blockage and Directivity in 60 GHz Wireless Personal Area Networks: From Cross-Layer Model to Multihop MAC Design, IEEE JSAC, Special Issue on Realizing Gbps Wireless Personal Area Networks, 2009.

Solutions for A/D converter bottleneck

J. Singh, O. Dabeer, U. Madhow, On the limits of communication with low-precision analog-to-digital conversion at the receiver, IEEE Transactions on Communication, Dec. 2009.
M. Seo, M. J. W. Rodwell, U. Madhow, Comprehensive digital correction of mismatch errors for a 400 Msamples/s 80-dB SFDR time-interleaved analog-to-digital converter , IEEE Trans. Microwave Theory and Techniques, vol. 53, no. 3, March 2005.

Resource allocation and QoS for wireless networks

S. Singh, U. Madhow and E. M. Belding, Shaping Throughput Profiles in Multihop Wireless Networks: A Resource Biasing Approach , IEEE Trans. Mobile Computing, 2011.
S. Singh, P. A. K. Acharya, U. Madhow and E. M. Belding-Royer, Sticky CSMA/CA: Implicit synchronization and real-time QoS in mesh networks, Ad Hoc Networks, Volume 5, Issue 6, (1) Wireless Mesh Networks; (2) Wireless Sensor Networks, August 2007, Pages 744-768.
H. Chaskar and U. Madhow, Fair scheduling with tunable latency: a round robin approach, IEEE/ACM Transactions on Networking, vol. 11, no. 4, pp. 592-601, August 2003.
H. Chaskar, U. Madhow, Statistical multiplexing and QoS provisioning for real-time traffic on wireless downlinks, IEEE Journal on Selected Areas in Communications, Wireless Communications Series, vol. 19, no. 2, pp. 347-354, February 2001.

Sensor networks

N. Shrivastava, R. Mudumbai, U. Madhow, S. Suri Target Tracking with Binary Proximity Sensors: Fundamental Limits, Minimal Descriptions, and Algorithms , ACM Trans. on Sensor Networks
R. Mudumbai, D.R. Brown III, U. Madhow, and H.V. Poor, Distributed Transmit Beamforming: Challenges and Recent Progress, IEEE Communications Magazine, vol. 47 no.2, pp 102-110, February 2009.
B. Ananthasubramaniam and U. Madhow, On Localization Performance in Imaging Sensor Nets, IEEE Trans. Signal Processing, vol. 55, no. 10, pp. 5044-5057, October 2007.
R. Mudumbai, G. Barriac, U. Madhow, On the feasibility of distributed beamforming in wireless networks, IEEE Trans. Wireless Communications, vol. 6, no. 5, pp. 1754 - 1763, May 2007.

Data Hiding (Steganography)

K. Solanki, U. Madhow, B. S. Manjunath, S. Chandrasekaran and I. El-Khalil, Print and Scan Resilient Data Hiding in Images , IEEE Transactions on Information Forensics and Security, vol. 1, no. 4, pp. 464-478, December 2006.
K. Sullivan, U. Madhow, S. Chandrasekaran and B.S. Manjunath, Steganalysis for Markov cover data with applications to images, , IEEE Transactions on Information Forensics and Security, vol. 1, no. 2, pp. 275-287, June 2006.
K. Solanki, N. Jacobsen, U. Madhow, B. S. Manjunath, S. Chandrasekaran, Robust Image-Adaptive Data Hiding Using Erasure and Error Correction, IEEE Transactions on Image Processing, vol. 13 , no. 12, pp. 1627-1639, December 2004.
O. Dabeer, K. Sullivan, U. Madhow, S. Chandrasekaran, B. S. Manjunath, Detection of Hiding in the Least Significant Bit, IEEE Transactions on Signal Processing vol. 52, no. 10, pp. 3046-3058, October 2004.

Space-time communication

N. Jacobsen, G. Barriac, U. Madhow, Noncoherent eigenbeamforming and interference suppression for outdoor OFDM systems, IEEE Transactions on Communications, vol. 56 no. 6, pp 915-924, June 2008
G. Barriac, U. Madhow, Space-time precoding with mean and covariance feedback: application to wideband OFDM, , IEEE Trans. Communications, vol. 54, no. 1, pp. 96-107, January 2006.
G. Barriac, U. Madhow, Characterizing the outage capacity for space-time communication over wideband channels, IEEE Transactions on Communications, vol. 52, no. 12, pp. 2198-2208, December 2004.
G. Barriac, U. Madhow, Space-time communication for OFDM with implicit channel feedback, IEEE Transactions on Information Theory, vol. 50, no. 12, pp. 3111-3129, December 2004.
E. Visotsky and U. Madhow, Space-time transmit precoding with imperfect feedback, IEEE Trans. Information Theory, vol. 47, no. 6, pp. 2632-2639, September 2001.

Non-coherent communication

R.-R. Chen, R. Koetter, U. Madhow, D. Agrawal, Joint noncoherent demodulation and decoding for the block fading channel: a practical framework for approaching Shannon capacity, vol. 51, no. 10, pp. 1676-1689, IEEE Transactions on Communications, October 2003.
R.-R. Chen, B. Hajek, R. Koetter, U. Madhow, On fixed input distributions for noncoherent communication over high SNR Rayleigh fading channels, IEEE Transactions on Information Theory, vol. 50, no. 12, pp. 3390-3396, December 2004.
D. Warrier and U. Madhow, Spectrally efficient noncoherent communication, IEEE Trans. Information Theory, vol. 48, no. 3, pp. 651-668, March 2002.
E. Visotsky and U. Madhow, Noncoherent multiuser detection for CDMA systems with nonlinear modulation: a non-Bayesian approach, IEEE Trans. Information Theory, vol. 47, no. 4, pp. 1352-1367, May 2001.

Equalization/Interference suppression/Multi-user detection

U. Madhow, K. Bruvold, L. J. Zhu, Differential MMSE: a framework for robust adaptive interference suppression for DS-CDMA over fading channels, IEEE Trans. Communications, vol. 53, no. 8, pp. 1377-1390, August 2005.
J. K. Nelson, A. C. Singer, U. Madhow, C. S. McGahey, BAD: Bidirectional Arbitrated Decision Feedback Equalization, IEEE Transactions on Communications, vol. 53, no. 2, pp. 214-218, February 2005.
C. D. Frank, E. Visotsky, U. Madhow, Adaptive interference suppression for the downlink of a direct sequence CDMA system with long spreading sequences, invited paper, special issue on Signal Processing for Wireless Communications: Algorithms, Performance, and Architecture, Journal of VLSI Signal Processing, vol. 30, no. 1, pp. 273-291, Jan 2002.
M. L. Honig, U. Madhow, S. Verdu, Blind adaptive multiuser detection, IEEE Trans. Information Theory, vol. 41, no. 4, pp. 944-960, July 1995.

TCP/IP

T. V. Lakshman, U. Madhow, B. Suter, TCP/IP performance with random loss and bidirectional congestion, IEEE/ACM Trans. Networking, vol. 8, no. 5, pp. 541-555, October 2000.
H. Chaskar, T. V. Lakshman, U. Madhow, TCP Over Wireless with Link Level Error Control: Analysis and Design Methodology, IEEE/ACM Trans. Networking, vol. 7, no. 5, pp. 605-615, October 1999.
T. V. Lakshman and U. Madhow, The performance of TCP/IP for networks with high bandwidth-delay products and random loss, IEEE/ACM Trans. Networking, vol. 5, no. 3, pp. 336-350, June 1997 (an earlier version appears in IFIP Transactions C-26, High Performance Networking V, pp. 135-150, North-Holland, 1994).

Adaptive coding

I. Abou-Faycal, M. Medard, U. Madhow, Binary adaptive coded pilot symbol assisted modulation over Rayleigh fading channels without feedback , IEEE Trans. Communications, vol. 53, no. 6, pp. 1036-1046, June 2005.

CDMA

U. Madhow, Blind adaptive interference suppression for the near-far resistant acquisition and demodulation of direct-sequence CDMA signals, IEEE Trans. Signal Processing, vol. 45, no. 1, pp. 124-136, January 1997.
U. Madhow and M. B. Pursley, Mathematical modeling and performance analysis for a two-stage acquisition scheme for direct-sequence spread spectrum CDMA, IEEE Trans. Communications, vol. 42, no. 9, pp. 2511-2520, September 1995.
U. Madhow and M. L. Honig, On the average near-far resistance for MMSE detection of Direct Sequence CDMA signals with random spreading, IEEE Trans. Information Theory, vol. 45, no. 5, pp. 2039-2045, September 1999.
U. Madhow, Blind adaptive interference suppression for direct-sequence CDMA, invited paper , Proceedings of the IEEE, special issue on blind identification and estimation, October 1998, pp. 2049-2069.
U. Madhow, MMSE Interference Suppression for Timing Acquisition and Demodulation in Direct-Sequence CDMA Signals, IEEE Trans. Communications, vol. 46, no. 8, pp. 1065-1075, August 1998.
U. Madhow, M. L. Honig, MMSE interference suppression for direct-sequence spread-spectrum CDMA, IEEE Trans. Communications, vol. 42, no. 12, pp. 3178-3188, December 1994.
U. Madhow and M. B. Pursley, Acquisition in direct-sequence spread-spectrum communication networks: an asymptotic analysis, IEEE Trans. Information Theory, pp. 903-912, vol. 39, no. 3, May 1993.
U. Madhow and M. B. Pursley, Limiting performance of frequency-hop random access, IEEE Trans. Information Theory, vol. 36, no. 2, pp. 322-333, March 1990.

Personal Communications

U. Madhow, M. L. Honig, K. Steiglitz, Optimization of wireless resources for personal communications mobility tracking, IEEE/ACM Trans. Networking, vol. 3, no. 6, pp. 698-707, December 1995.
V. Anantharam, M. L. Honig, U. Madhow, V. K. Wei, Optimization of a database hierarchy for mobility tracking in a personal communications network, Performance Evaluation, vol. 20, pp. 287-300, 1994.

Universal Receivers

U. Madhow and M. B. Pursley, On the Design of Universal Receivers for Nonselective Rician-Fading Channels, IEEE Trans. Communications, vol. 42, no. 9, pp. 2703-2712, 1994.
U. Madhow and M. B. Pursley, Universal receivers with side information from the demodulators: an example for nonselective Rician fading channels, IEEE Trans. communications, vol. 42, no. 7, pp. 2395-2405, July 1994.
U. Madhow and M. B. Pursley, A parallel systems approach to universal receivers, IEEE Trans. Information Theory, vol. 37, no. 2, pp. 291-306, March 1991.

Back to Publications

Conference Papers

mm-wave (60 GHz) networks

Directional MAC design

S. Singh, R. Mudumbai and U. Madhow, Distributed Coordination with Deaf Neighbors: Efficient Medium Access for 60 GHz Mesh Networks , Proc. IEEE INFOCOM 2010, San Diego, CA, March 2010.
R. Mudumbai, S. Singh and U. Madhow, Medium Access Control for 60 GHz Outdoor Mesh Networks with Highly Directional Links , Proc. IEEE INFOCOM 2009, Mini-Conference, Rio de Janeiro, April 2009.
S. Singh, F. Ziliotto, U. Madhow, E. M. Belding and M. J. W. Rodwell, Millimeter Wave WPAN: Cross-Layer Modeling and Multihop Architecture, Proc. IEEE INFOCOM 2007, Minisymposium, Anchorage, AL, May 2007.

Line-of-Sight MIMO architectures

E. Torkildson, U. Madhow, M. Rodwell, On the Feasibility of Spatial Multiplexing for Indoor 60 GHz Communication , International Workshop on mmWave Communications: from Circuits to Networks(mmCom10), Chicago, IL, Sept. 2010.
E. Torkildson, C. Sheldon, U. Madhow, M. Rodwell, Millimeter-wave Spatial Multiplexing in an Indoor Environment , First International Workshop on Multi-Gigabit MM-Wave and Tera-Hz Wireless Systems (MTWS'09), Honolulu, Hawaii, November 2009.
E. Torkildson, C. Sheldon, U. Madhow, M. Rodwell, Nonuniform Array Design for Robust Millimeter-Wave MIMO Links , in Proc. IEEE Global Communications Conference 2009 (Globecom), Honolulu, Hawaii, November 2009.
C. Sheldon, M. Seo, E. Torkildson, M. Rodwell, and U. Madhow, Four-Channel Spatial Multiplexing Over a Millimeter-Wave Line-of-Sight Link , MTTS International Microwave Symposium, Boston, Massachusetts, June 2009.
C. Sheldon, E. Torkildson, M. Seo, C. P. Yue, M. Rodwell, U. Madhow, Spatial Multiplexing Over a Line-of-Sight Millimeter-Wave MIMO Link: A Two-Channel Hardware Demonstration at 1.2Gbps Over 40m Range , Proc. of European Microwave Conference (EuMC), Amsterdam, The Netherlands, October 2008.
C. Sheldon, E. Torkildson, M. Seo, C. P. Yue, M. Rodwell, U. Madhow, A 60GHz Line-of-Sight 2x2 MIMO Link Operating at 1.2Gbps , IEEE Ant. and Prop. Int. Symp., San Diego, California, July 2008.
E. Torkildson, B. Ananthasubramaniam, U. Madhow and M. Rodwell, Millimeter-wave MIMO: Wireless Links at Optical Speeds (Invited Paper) Proc. of 44th Allerton Conference on Communication, Control and Computing, Monticello, Illinois, Sept 2006.

Channel Modeling

H. Zhang, U. Madhow, Statistical Modeling of Fading and Diversity for Outdoor 60 GHz Channels , International Workshop on mmWave Communications: from Circuits to Networks(mmCom10), Chicago, IL, Sept. 2010.
H. Zhang, S. Venkateswaran, U. Madhow, Channel Modeling and MIMO Capacity for Outdoor Millimeter wave Links , Wireless Communications and Networking Conference, Sydney, Australia, Apr. 2010.
E. Torkildson, H. Zhang, U. Madhow, Channel Modeling for Millimeter Wave MIMO , Information Theory and Applications Workshop(ITA), San Diego, CA, Feb. 2010.

The A/D Converter Bottleneck

J. Singh, Feifei S. and U. Madhow, Automatic Gain Control for ADC-limited Communication , to be presented on Proc. 2010 IEEE Global Communications Conference(ICUWB 2009), Miami, Florida, 2010
J. Singh, P.Sandeep and U. Madhow, Multi-Gigabit Communication: the ADC Bottleneck , invited paper, Proc. 2009 IEEE International Conference on Ultra-Wideband (ICUWB 2009), Vancouver, September 2009
P. Sandeep, J. Singh and U. Madhow, Signal Processing for Multigigabit Communication , Proc. 2009 Information Theory and Applications Workshop, (ITA), UC San Diego.

Solution 1: Low precision ADC

J. Singh and U. Madhow, On block noncoherent communication with low-precision phase quantization at the receiver , Proc. 2009 International Symposium on Information Theory (ISIT 2009), South Korea, July 2009
J. Singh, O. Dabeer and U. Madhow Capacity of the Discrete-Time AWGN Channel Under Output Quantization , Proc. 2008 International Symposium on Information Theory (ISIT 2008), Toronto, July 2008
J. Singh, O. Dabeer and U. Madhow, Communication Limits with Low-Precision Analog-to-Digital Conversion at the Receiver , in Proc. of IEEE International Conference on Communications (ICC'07), Glasgow, Scotland, June 2007.
O. Dabeer, J. Singh, U. Madhow , On the Limits of Communication Performance with One-bit A-D conversion. In Proc. IEEE Workshop on Signal Processing Advances in Wireless Communication (SPAWC 06) , Cannes, France, July 2006.
J. Singh, O. Dabeer, U. Madhow , Signal Processing with Low-Precision A/D Conversion : A Framework for Low-Cost Gigabit Wireless Communication. /Presented at the 35th IEEE Communication Theory Workshop (CTW 06) , Puerto Rico, May 2006.
O. Dabeer, U. Madhow, Detection and interference suppression for ultrawideband signaling with analog processing and one bit A/D, Proc. 2003 Asilomar conference on Signals, Systems, and Computers, Pacific Grove, CA, November 2003.

Solution 2: Time-interleaved ADC

P. Sandeep and U. Madhow On the convergence of joint channel and mismatch estimation for time-interleaved data converters , to be presented at Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, Nov 2011.
P. Sandeep and U. Madhow On the scaling of joint mismatch and channel estimation for time-interleaved ADCs , presented at Allerton Conference, Allerton.
P. Sandeep and U. Madhow Scalable mismatch compensation for time-interleaved A/D converters in OFDM reception , Wireless Communications and Networking Conference (WCNC), Sydney, April, 2010
P. Sandeep, U. Madhow, M. Seo, M. Rodwell, Joint Channel and Mismatch Correction for OFDM Reception with Time-interleaved ADCs: Towards Mostly Digital MultiGigabit Transceiver Architectures , Proc. 2008 IEEE Global Telecommunications Conference, (GLOBECOM), New Orleans.
M. Seo, M. Rodwell and U. Madhow,, Generalized blind mismatch correction for two-channel time- interleaved A-to-D converters, , in Proc. IEEE International Conf. on Acoustics, Speech and Signal Processing (ICASSP 2007), Hawaii, USA, April 2007.
M. Seo, M. Rodwell and U. Madhow , A low computation adaptive blind correction for time-interleaved ADC , Proc. IEEE 49th Int. Midwest Symp. Circuits and Systems (MWSCAS 2006), Puerto Rico, August 2006.
M. Seo, M. Rodwell and U. Madhow , Blind correction of gain and timing mismatches for a two- channel time-interleaved analog-to-digital converter: Experimental verification , Proc. IEEE Int. Symp. Circuits and Systems (ISCAS 2006), Greece, pp. 3394-3397, May 2006.
M. Seo, M. J. W. Rodwell, U. Madhow , Blind correction of gain and timing mismatches for a two- channel time-interleaved analog-to-digital converter , Proc. 39th Asilomar Conf. on Signals, Systems and Computers, pp. 1121-1125, Pacific Grove, CA, October 28-November 1, 2005.

HD video transmission

M. Manohara, R. Mudumbai, J. Gibson and U. Madhow, Error correction scheme for uncompressed HD video over wireless , in Proc. IEEE ICME 2009, June-July 2009.

Resource allocation and medium access control (MAC) for wireless networks

S. Venkateswaran, S. Singh, U. Madhow and R. Mudumbai, "Distributed Synchronization and Medium Access in Wireless Mesh Networks , Information Theory and Applications Workshop (ITA) 2011 (Invited), San Diego, CA, Feb. 2011.
S. Singh, U. Madhow, E. M. Belding, Beyond Proportional Fairness: A Resource Biasing Approach for Shaping Throughput Profiles in Multihop Wireless Networks , Proc. IEEE INFOCOM 2008, Mini-Conference, Phoenix, AZ, April 2008.
K. Bruvold, R. Mudumbai, U. Madhow, A QoS framework for stabilized collision channels with multiuser detection , Proc. IEEE International Conference on Communications (ICC 2005), vol. 1, pp. 250-254, Seoul, Korea, May 2005.
R. Mudumbai, G. Barriac, U. Madhow, Optimizing Medium Access for Rapid Handoffs in Pseudocellular Networks, Proc. IEEE Vehicular Technology Conference 2004-Fall, Los Angeles, CA, USA, September 2004.
K. Bruvold, U. Madhow, Cross-layer optimization of the reservation channel in a pseudocellular network: mobile-centric fast handoffs via multiuser detection, Proc. 2003 Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, November 2003.
Z. Shao, U. Madhow, A Qos Framework for Heavy-tailed Traffic over the Wireless Internet, Proc. 2002 IEEE Military Communications Conference (MILCOM 2002), Anaheim, CA, October 2002.
Z. Shao, U. Madhow, Scheduling heavy-tailed traffic over the wireless Internet, Proc. 2002 IEEE Vehicular Technology Conference (Fall), Vancouver, Canada, September 2002.
H. Chaskar, U. Madhow, Fair scheduling with tunable latency: a round robin approach, IEEE Globecom'99, November 1999.

Sensor Networks

Space-Time Localization

S. Venkateswaran and U. Madhow Space-Time Localization From Times of Arrival , Proc. of 49th Allerton Conference on Communication Control and Computing, Sept 2011

Timing Synchronization

S. Venkateswaran and U. Madhow Implicit Network Timing Synchronization With Phase-Only Updates , Proc. of 45th Annual Conference on Information Sciences And Systems, 2011

Correlated Sensing

S. Venkateswaran and U. Madhow Collaborative Estimation in Dispersive Environments: A Frequency Domain Approach , To appear Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, Nov 2011.
S. Venkateswaran and U. Madhow Distributed Detection with a Minimalistic Signal Model: A Framework for Exploiting Correlated Sensing , Proc. 2008 International Symposium on Information Theory (ISIT 2008), Toronto, July 2008
J. Singh, A. Saxena, K. Rose and U. Madhow, Optimization of Correlated Source Coding for Event-Based Monitoring in Sensor Networks , Proc. 2009 IEEE Data Compression Conference, (DCC), Snowbird, Utah

Localization and target tracking

R. Mudumbai and U. Madhow Information-theoretic bounds for sensor network localization , Proc. 2008 International Symposium on Information Theory (ISIT 2008), Toronto, July 2008
J. Singh, U. Madhow, R. Kumar, S. Suri and R. Cagley , Tracking Multiple Targets Using Binary Proximity Sensors , Proc. of IEEE/ACM International Conference on Information Processing in Sensor Networks (IPSN'07), Cambridge, MA, April 2007.
B. Ananthasubramaniam and U. Madhow, Collector Receiver Design for Data Collection and Localization in Sensor-driven Networks , Proc. Conference on Information Sciences and Systems (CISS'07), Baltimore, March 2007.
N. Shrivastava, R. Mudumbai, U. Madhow and S. Suri, Target Tracking with Binary Proximity Sensors: Fundamental Limits, Minimal Descriptions, and Algorithms, Proc. ACM SenSys 2006

Imaging sensor nets

M. Seo, B. Ananthasubramaniam, M. Rodwell and U. Madhow, Millimeterwave imaging sensor nets: a scalable 60-GHz wireless sensor network, , in Proc. IEEE MTT-S Int. Microwave Symposium (IMS 2007), Hawaii, USA, June 2007.
U. Madhow , "Minimalistic architectures for sensor networks ", invited paper, Proc. International Conf. Computers and Devices for Communication (CODEC-06), Kolkata, India, December 2006.
U. Madhow, M. J. W. Rodwell, B. Ananthasubramaniam, M. K. Seo, P. Park , "Imaging sensor nets: an RFID-inspired framework for million node sensor networks ", Proc. International Workshop on RFID and wireless sensors, Indian Institute of Technology, Kanpur, India, November 2005. Available online: http://www.iitk.ac.in/ee/RFIDWS/rfweb/Book of Extended Abstracts Final.pdf .
B. Ananthasubramaniam, U. Madhow, Detection and Localization of Events in Imaging Sensor Nets, Proc. 2005 IEEE International Symposium on Information Theory (ISIT 2005), Adelaide, Australia, September 2005.
B. Ananthasubramaniam, U. Madhow, Virtual Radar Approach to Event Localization in Sensor Networks, Proc. 2004 IEEE International Symposium on Information Theory (ISIT 2004), Chicago, IL, June 27-July 2, 2004.
B. Ananthasubramaniam, U. Madhow, Virtual Radar Imaging for Sensor Networks, Proc. 3rd International Symposium on Information Processing in Sensor Networks (IPSN'04), Berkeley, California, USA, April 2004.

Distributed beamforming

R. Mudumbai, B. Wild, U. Madhow and K. Ramchandran, Distributed Beamforming using 1 Bit Feedback: from Concept to Realization, Proc. of 44'th Allerton Conference on Communication Control and Computing, Sept 2006 (invited paper)
R. Mudumbai, J. Hespanha, U. Madhow, Scalable Feedback Control for Distributed Beamforming in Sensor Networks, Proc. 2005 IEEE International Symposium on Information Theory (ISIT 2005), Adelaide, Australia, September 2005.
R. Mudumbai, G. Barriac, U. Madhow, Spread-Spectrum Techniques for Distributed Space-Time Communication in Sensor Networks, invited paper, Proc. 38th Asilomar Conference on Signals, Systems and Computers, vol. 1, pp. 908-912, November 2004.
G. Barriac, R. Mudumbai, U. Madhow, Distributed Beamforming for Information Transfer in Sensor Networks, Proc. 3rd International Symposium on Information Processing in Sensor Networks (IPSN'04), Berkeley, California, USA, April 2004.

Data Hiding (Steganography)

A. Sarkar, K. Solanki, U. Madhow, S. Chandrasekaran and B. S. Manjunath, "Secure Steganography: Statistical Restoration of the Second Order Dependencies for Improved Security", Proc. 32nd IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Honolulu, Hawaii, Apr. 2007.
A. Sarkar, U. Madhow, S. Chandrasekaran and B. S. Manjunath, Adaptive MPEG-2 Video Data Hiding Scheme", Proc. SPIE Security, Steganography, and Watermarking of Multimedia Contents IX, Jan. 2007.
K. Sullivan, K. Solanki, B. S. Manjunath, U.Madhow and S. Chandrasekaran, Determining achievable rates for secure zero divergence steganography , Proc. IEEE International Conference on Image Processing 2006 (ICIP 2006), Atlanta, GA, USA, Oct. 2006.
K. Solanki, K. Sullivan, U. Madhow, B. S. Manjunath and S. Chandrasekaran , Provably secure steganography: Achieving zero K-L divergence using statistical restoration , Proc. IEEE International Conference on Image Processing 2006 (ICIP 2006), Atlanta, GA, USA, Oct. 2006.
K. Solanki, K. Sullivan, U. Madhow, B. S. Manjunath, and S. Chandrasekaran, Statistical Restoration for Robust and Secure Steganography, Proceedings of Int'l Conference on Image Processing (ICIP 2005), Genova, Italy, September 2005.
K. Solanki, U. Madhow, B. S. Manjunath, S. Chandrasekaran, Modeling the Print-Scan Process for Resilient Data Hiding, Proceedings of IS&T/SPIE's 17th Annual Symposium on Electronic Imaging Science and Technology, San Jose, CA, Jan. 2005.
K. Sullivan, U. Madhow, S. Chandrasekaran, and B. S. Manjunath, Steganalysis of spread spectrum data hiding exploiting cover memory, Proceedings of IS&T/SPIE's 17th Annual Symposium on Electronic Imaging Science and Technology, San Jose, CA, January 2005.
K. Solanki, U. Madhow, B. S. Manjunath, and S. Chandrasekaran, Estimating and Undoing Rotation for Print-Scan Resilient Data Hiding, Proc. IEEE International Conference on Image Processing (ICIP 2004), Singapore, Oct. 2004. (Best student paper award)
K. Sullivan, Z. Bi, U. Madhow, S. Chandrasekaran and B.S. Manjunath, Steganalysis of Quantization Index Modulation Data Hiding, Proc. IEEE International Conference on Image Processing (ICIP 2004), Singapore, Oct. 2004.
K. Solanki, O. Dabeer, B. S. Manjunath, U. Madhow, S. Chandrasekaran, Robust image-adaptive data hiding: modeling, source coding and channel coding, {bf invited paper, Proc. 41st Annual Allerton Conf. on Communications, Control and Computing, Monticello, Illinois, October 2003.
K. Solanki, O. Dabeer, B. S. Manjunath, U. Madhow, S. Chandrasekaran, A joint source-channel coding scheme for image-in-image data hiding, Proc. IEEE International Conference on Image Processing (ICIP 2003), Barcelona, Spain, September 2003.
K. Sullivan, O. Dabeer, U. Madhow, B. S. Manjunath, S. Chandrasekaran, LLRT based detection of LSB hiding, Proc. IEEE International Conference on Image Processing (ICIP 2003), Barcelona, Spain, September 2003.
O. Dabeer, K. Sullivan, U. Madhow, S. Chandrasekaran, B. S. Manjunath, Detection of hiding in the least significant bit, Proc. 2003 Conference on Information Sciences and Systems (CISS 2003), Johns Hopkins University, Baltimore, MD, March 2003.

Space-time Communication

G. Barriac and U. Madhow, Antenna selection for space-time communication with covariance feedback , Proc. 2004 IEEE Global Telecommunications Conference (Globecom 2004), Dallax, TX, December 2004.
G. Barriac, U. Madhow, Space-time precoding with mean and covariance feedback: implications for wideband systems, Proc. 2004 IEEE International Symposium on Information Theory (ISIT 2004), Chicago, IL, June 27-July 2, 2004.
B. Ananthasubramaniam, G. Barriac, R. Mudumbai, U. Madhow, Distributed space-time communication for sensor networks , Proc. First International Symp. on Control, Communications, and Signal Processing, Hammamet, Tunisia, March 2004.
G. Barriac, U. Madhow, Space-time communication for OFDM with implicit channel feedback, IEEE Globecom 2003, San Francisco, CA, December 2003.
G. Barriac, U. Madhow, Wideband space-time communication with implicit channel feedback, invited paper, Proc. Seventh International Symposium on Signal Processing and its Applications (ISSPA 2003), pp. 225-228, Paris, France, July 2003.
G. Barriac, U. Madhow, Characterizing outage rates for space-time communication over wideband wireless channels, invited paper, Proc. 2002 Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, November 2002.
Eugene Visotsky and Upamanyu Madhow, Space-time precoding with imperfect feedback, Proc. 2000 International Symposium on Information Theory (ISIT 2000), pp. 312, Sorrento, Italy, June 2000.
E. Visotsky, U. Madhow, Space-time transmit strategies and channel feedback generation for wireless fading channels, invited paper, Proc. 34th Asilomar Conf. Signals, Systems and Computers (Asilomar 2000), Pacific Grove, CA, October 2000.
U. Madhow, D. Warrier, E. Visotsky, Multiuser Space-Time Communication, Proc. 1999 IEEE Information Theory Workshop, Kruger National Park, South Africa, June 1999.
E. Visotsky and U. Madhow, Optimal beamforming using transmit antenna arrays, 1999 IEEE Vehicular Technology Conference (VTC'99).

Non-coherent Communication

N. Jacobsen, U. Madhow, Code and constellation optimization for efficient noncoherent communication, invited paper, Proc. 38th Asilomar Conference on Signals, Systems and Computers, vol. 1, pp. 908-912, November 2004.
N. Jacobsen, G. Barriac, U. Madhow, Noncoherent eigenbeamforming for a wideband cellular uplink, Proc. 2004 IEEE International Symposium on Information Theory (ISIT 2004), Chicago, IL, June 27-July 2, 2004.
N. Jacobsen, U. Madhow, Reduced-complexity noncoherent communication with differential QAM and iterative receiver processing, Proc. 2003 Conference on Information Sciences and Systems (CISS 2003), Johns Hopkins University, Baltimore, MD, March 2003.
R.-R. Chen, R. Koetter, U. Madhow, Joint noncoherent demodulation and decoding for fast Rayleigh fading channels, Proc. 2003 Conference on Information Sciences and Systems (CISS 2003), Johns Hopkins University, Baltimore, MD, March 2003.
Dilip Warrier, Upamanyu Madhow, and Ralf Koetter, Coding for noncoherent communication, Proc. 2000 International Symposium on Information Theory (ISIT 2000), pp. 76, Sorrento, Italy, June 2000.
Rong-Rong Chen, Dakshi Agrawal, Upamanyu Madhow, Noncoherent detection of factor-graph codes over fading channels, Proc. of the 2000 Conference on Information Sciences and Systems (CISS 2000), Princeton, NJ, March 15-17, 2000.
D. Warrier and U. Madhow, Noncoherent Communication in Space and Time, invited paper, Proc. 1999 Conf. Information Sciences and Systems (CISS'99), Johns Hopkins University, Baltimore, MD, March 1999.
U. Madhow and D. Warrier, A Signal Space Approach for Noncoherent Communication, invited paper, pp. 34, Proc. IEEE IT Workshop on Detection, Estimation and Imaging, Santa Fe, NM, February 1999.

Equalization/Interference suppression/Multi-user detection

J. K. Nelson, A. C. Singer, U. Madhow, Multi-directional decision feedback for 2D equalization, Proc. 2004 IEEE International Conf. on Acoustics, Speech, and Signal Processing (ICASSP '04), May 2004.
K. Bruvold, U. Madhow, Adaptive multiuser detection for mobile-centric fast handoffs in pseudocellular networks, Proc. VTC 2003 (Fall), Orlando, FL, October 2003.
J. K. Nelson, A. C. Singer, U. Madhow, Asymptotic efficiency of the BAD algorithm, 2003 IEEE Workshop on Statistical Signal Processing, pp. 86-89, September 28-October 1, 2003.
G. Barriac, N. Jacobsen, U. Madhow, Beyond BAD: a parallel arbitration framework for low-complexity equalization, invited paper, Proc. 39th Annual Allerton Conf. on Communications, Control and Computing, Monticello, Illinois, October 2001.
G. Barriac, U. Madhow, PASIC: a new paradigm for low-complexity multiuser detection, 2001 Conf. Information Sciences and Systems (CISS'01), Johns Hopkins University, March 2001.
Upamanyu Madhow, Multiuser Detection: An Overview and a New Result,{bf invited paper, Proc. International Workshop on Independent Component Analysis and Blind Signal Separation, pp. 257-266, Helsinki, Finland, June 2000.
C. S. McGahey, A. C. Singer, U. Madhow, BAD: a bi-directional arbitrated decision feedback equalizer, Proc. of the 2000 Conference on Information Sciences and Systems (CISS2000), Princeton, NJ, March 15-17, 2000.
U. Madhow, L. J. Zhu and L. Galup, Differential MMSE: new adaptive algorithms for equalization, interference suppression, and beamforming, invited paper, Proc. 32nd Asilomar Conf. Signals, Systems and Computers (Asilomar'98), pp. 640-644, Pacific Grove, CA, October 1998.

CDMA

Rong-Rong Chen and Upamanyu Madhow, Admission control and resource allocation for DS-CDMA networks with multiple traffic classes, Proc. 2000 international Symposium on Information Theory (ISIT 2000), pp. 469, Sorrento, Italy, June 2000.
D. Agrawal, B. S. Johnson, U. Madhow, K. Ramchandran, K. S. Chun, A wideband satcom based avionics network with CDMA uplink and TDM downlink, Proc. 18th AIAA International Communications Satellite Systems Conference (ICSSC), Oakland, CA, April 2000.
D. Warrier, U. Madhow, On the Capacity of Cellular CDMA with Controlled Power Disparities, Proc. 1998 IEEE Vehicular Technology Conference (VTC'98), Ottawa, Canada, May 1998.
V. Subramaniam and U. Madhow, Blind Demodulation of Direct-Sequence CDMA Signals Using an Antenna Array, Proc. Conf. Inform. Sci. Sys. (CISS'96), Princeton, NJ, March 1996.
L. J. Zhu and U. Madhow, MMSE Interference Suppression for Rapidly Faded CDMA Systems: A New Formulation for Differentially Modulated Signals, Proc. 1998 International Symposium on Information Theory (ISIT'98), Cambridge, MA, June 1998.
L. Galup and U. Madhow, Blind Spatial Interference Suppression of DS-CDMA with Long Spreading Sequences, Proc. 1998 International Symposium on Information Theory (ISIT'98), Cambridge, MA, June 1998.
L. J. Zhu and U. Madhow, Adaptive interference suppression for direct sequence CDMA over severely time varying channels, Proc. IEEE Globecom'97, San Diego, CA, November 1997.
E. Visotsky and U. Madhow, Multiuser detection for CDMA systems with nonlinear modulation, Proc. 1997 IEEE International Symp. Information Theory (ISIT'97), June 29-July 4, 1997, Ulm, Germany.
L. J. Zhu and U. Madhow, Performance of adaptive interference suppression for DS-CDMA with Rayleigh fading Channel, Proc. 1997 Conf. Inform. Sci. Sys. (CISS'97), March 19-21, 1997, Johns Hopkins University, Baltimore, MD.
L. He and U. Madhow, Pipelined MMSE equalizers for direct-sequence spread-spectrum CDMA channels, Proc. International Conf. Univ. Personal Commun. (ICUPC'96), Boston, MA, September 29-October 2, 1996.
U. Madhow, Signal Processing for Interference Suppression in Direct-Sequence CDMA Systems, invited paper, Proc. ICASSP'96, Atlanta, GA, May 1996.
U. Madhow, Adaptive Interference Suppression for Joint Acquisition and Demodulation of Direct-Sequence CDMA Signals, Proc. Milcom '95, San Diego, CA, November 1995.
U. Madhow, MMSE Interference Suppression for Joint Acquisition and Demodulation in CDMA systems, Proc. 1995 International Symp. on Information Theory (ISIT '95), Whistler, B.C., Canada, September 1995
U. Madhow, Near-Far Resistant Acquisition and Demodulation for Direct-Sequence CDMA, invited paper, Proc. 1995 IEEE IT Workshop on Inform. Theory, Multiple Access and Queueing, St. Louis, MO, April 1995.
U. Madhow, Blind adaptive interference suppression for acquisition and demodulation of direct-sequence CDMA signals, Proc. Conf. Inf. Sci. Sys. (CISS '95), Johns Hopkins University, Baltimore, MD, March 1995.
M. L. Honig, U. Madhow, and S. Verdu, Blind adaptive interference suppression for near-far resistant CDMA, Proc. Globecom '94.
M. L. Honig and U. Madhow, Hybrid intra-cell TDMA/inter-cell CDMA for wireless networks with inter-cell interference suppression, VTC '93, Secaucus, NJ.
U. Madhow and M. L. Honig, MMSE detection of CDMA signals: analysis for random signature sequences, 1993 International Symposium on Information Theory (ISIT '93), January 17-22, 1993, San Antonio, TX.
M. L. Honig and U. Madhow, Optimization of transmitter pulses for two-user data communications, 1993 International Symposium on Information Theory (ISIT '93), January 17-22, 1993, San Antonio, TX.
U. Madhow and M. L. Honig, Error probability and near-far resistance of minimum mean-squared error interference suppression schemes for CDMA, Proc. Globecom '92.
U. Madhow and M. L. Honig, Minimum mean squared error interference suppression for direct-sequence code-division multiple access, 1st International Conf. on Universal Personal Communications (UPC '92), September 29-October 2, 1992, Dallas, TX.
U. Madhow, On the performance of a two-stage acquisition scheme for direct-sequence spread-spectrum code division multiple access, Proc. 29th Annual Allerton Conf. on Commun., Control and Computing, University of Illinois at Urbana-Champaign, October 2-4, 1991.
U. Madhow and M. B. Pursley, Acquisition-based capacity of direct-sequence spread spectrum communication networks, 25th Annual Conf. Inform. Sciences and Systems (CISS '91), Johns Hopkins University, Baltimore, MD, March 20-22, 1991.
U. Madhow and M. B. Pursley, Limiting performance of frequency-hop random access, 1990 International Symposium on Information Theory (ISIT '88), June 19-24, 1988, Kobe, Japan.

TCP/IP

U. Madhow and J. Waldby, A System-Theoretic Approach to Reliable Internet Data Transport, presented at the 1999 Communication Theory Workshop, Aptos, CA, May 1999.
H. Chaskar and U. Madhow, Wireless Link Shaping for Service Guarantees, Proc. 1998 International Symposium on Information Theory (ISIT'98), Cambridge, MA, June 1998.
U. Madhow, Dynamic congestion control and error recovery over a heterogeneous Internet, invited paper, Proc. 36th IEEE Conference on Decision and Control (CDC'97), San Diego, CA, December 1997.
T. V. Lakshman, U. Madhow, B. Suter, Window-based error recovery and flow control with a slow acknowledgement channel: a study of TCP/IP performance, Proc. IEEE Infocom '97, Kobe, Japan, April 1997.
H. Chaskar, U. Madhow, T. V. Lakshman, On the design of interfaces for TCP/IP over wireless, invited paper, Proc. IEEE Military Communications Conference (Milcom '96), November 5-8, San Diego, CA, 1996.
J. Waldby, U. Madhow, Dynamic window-based flow control with end-to-end selective acknowledgements, Proc. 3rd International Workshop on mobile multimedia communications (MoMuC3), September 25-27, 1996, Princeton, NJ.
T. V. Lakshman and U. Madhow, TCP performance in wide-area networks: the impact of high bandwidth-delay products and random loss, invited paper, Proc. 1995 ACM SIGMETRICS and Performance 1995, pp. 262, May 1995.
T. V. Lakshman and U. Madhow, Window-based congestion control in networks with high bandwidth-delay products and random loss, invited paper, Proc. 3rd INFORMS Telecom. Conf., Boca Raton, FL, March 1995.
T. V. Lakshman and U. Madhow, Window-based congestion control for networks with high bandwidth-delay products and random loss: a study of TCP/IP performance, Proc. 5th IFIP Conf. on High Performance Networking (HPN '94), June 27-July 1, 1994, Grenoble, France.

Adaptive coding

M. Medard, I. Abou-Faycal, U. Madhow, Adaptive coding for pilot symbol assisted modulation without feedback, invited paper, Proc. 2002 Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, November 2002.
M. Medard, I. Abou-Faycal, U. Madhow, Adaptive coding with pilot signals, invited paper, 38th Annual Allerton Conf. on Communication, Control, and Computing, Monticello, Illinois, October 2000.

Others

Speech and video-processing

M. Quinn, R. Mudumbai, T. Kuo, Z. Ni, C. De Leo, B. Manjunath, VISNET: A Distributed vision testbed , Proc. 2008 International Conference on Distributed Smart Cameras, Stanford University, Sept 2008
C.-H. Lin, H. Dong, U. Madhow, A. Gersho, Supporting real-time speech on wireless ad hoc networks: inter-packet redundancy, path diversity, and multiple description coding, Proc. 2nd ACM International Workshop on Wireless Mobile Applications and Services on WLAN Hotspots (WMASH 2004), Philadelphia, PA, USA, October 2004.
H. Dong. I. D. Chakares, C.-H. Lin, A. Gersho, E. Belding-Royer, U. Madhow, J. D. Gibson, Speech coding for mobile ad hoc networks, Proc. 2003 Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, November 2003.

Time-varying channels

N. Jacobsen, G. Barriac, U. Madhow, R.-R. Chen, R. Koetter, Towards Shannon-theoretic limits on wireless time-varying channels , Proc. First International Symp. on Control, Communications, and Signal Processing, Hammamet, Tunisia, March 2004.

Personal Communications

U. Madhow, Power and bandwidth optimization for personal communications mobility tracking, Proc. ISIT'94, Trondheim, Norway, June 1994.
U. Madhow, M. L. Honig, K. Steiglitz, Optimization of wireless resources for personal communications mobility tracking, Proc. IEEE Infocom '94 (subsequently {bf invited for submission to IEEE/ACM Trans. Networking by the Infocom'94 technical program committee).
V. Anantharam, M. L. Honig, U. Madhow, V. K. Wei, Optimization of a database hierarchy for mobility tracking in personal communications networks, Proc. 16th IFIP W.G. 7.3 International Symposium on Computer Performance Modeling, Measurement and Evaluation (Performance '93), September 29-October 1, 1993, Rome, Italy.

Universal receivers

M. B. Pursley and U. Madhow, Parallel structures for universal communication receivers, invited paper, 1990 Bilkent International Conf. on New Trends in Commun., Control and Signal Proc., July 2-5, 1990, Bilkent University, Ankara, Turkey.
U. Madhow and M. B. Pursley, A parallel systems approach to universal receivers, 1990 International Symposium on Information Theory (ISIT '90), January 14-19, 1990, San Diego, CA.

Back to Publications

Technical reports

D. Ramasamy and U. Madhow, Geographic Routing in Large-Scale MANETs , July 2011
S. Venkateswaran and U. Madhow, Distributed Implicit Timing Synchronization for Multihop Mesh Networks , July 2010
P.Sandeep and U. Madhow, Scalable Mismatch Correction for Time-interleaved Analog-to-Digital Converters in OFDM Reception , Jan. 2009