Xiaodong Cai

Assistant Professor
Electrical and Computer Engineering
University of Miami
1251 Memorial Drive, #EB513
Coral Gables, FL 33146
Tel/Fax: 1.305.284.5329/4044
x.cai@miami.edu

PERSONAL WEBSITE

EDUCATION TEACHING RESEARCH PUBLICATIONS EXPERIENCE

EDUCATION:
B.S.(EE) - Zhejiang University, China
M.Eng.(EE) - National University of Singapore
Ph.D. (EE) - New Jersey Institute of Technology 2001

TEACHING:
Fall 2005
EEN 562 Wireless Communications

Spring 2005
EEN 564 Wireless Networks, Syllabus, Blackboard

Fall 2004
EEN 562 Wireless Communications, Syllabus, Blackboard

Summer 2002
EE 3025 Statistical Methods in Electrical Engineering, University of Minnesota

RESEARCH:
My main research interests lie in the following two areas:
Statistical signal processing, wireless communications and networking, and information theory
Bioinformatics and computational system biology
In the first area, I currently focus on cross-layer cooperative communications and collaborative signal processing for wireless ad hoc and sensor netoworks. I have worked on various topics in this area including transmit diversity and beamforming for multi-antenna (MIMO) systems, adaptive modulation, diversity and interference supression for OFDMA and multicarrier CDMA systems, multiuser detection for CDMA systems, fading channel modeling and estimation, and hybrid ARQ.

In the second area, I am focusing on microarray data analysis, genetic network modeling and simulations, and genetic regulatory motif identification.

PUBLICATIONS:
Journal (In Print/In Press)

A. Ribeiro, X. Cai, and G. B. Giannakis, “Opportunistic Multipath for Bandwidth-Efficient Cooperative Networking,” IEEE Transactions on Wireless Communications, 2006, to appear.

X. Cai and G. B. Giannakis,“ Identifying Differentially Expressed Genes in Microarray Experiments with Model-Based Variance Estimation,” IEEE Transactions on Signal Processing, June 2006, to appear.

Y. Yu, X. Cai, and G. B. Giannakis, “On the Instability of Slotted Aloha with Capture,” IEEE Transactions on Wireless Communications, to be published.

X. Cai and G. B. Giannakis, “Differential Space-Time Modulation with Transmit-Beamforming for Correlated MIMO Fading Channels,” IEEE Transactions on Signal Processing, to be publisehd.[pdf]

Y. Yao, X. Cai, and G. B. Giannakis, “On Energy Efficiency and Optimum Resource Allocation in Wireless Relay Transmissions,” IEEE Transactions on Wireless Communications, to be published.

A. Ribeiro, X. Cai, and G. B. Giannakis, “Symbol Error Probabilities for General Cooperative Links,” IEEE Transactions on Wireless Communications, vol. 4, no. 3, pp. 1264-1273, May 2005. [pdf]

X. Cai, G. B. Giannakis, and M. D. Zoltowski, “Space-Time Spreading and Block Coding for Correlated Fading Channels in the Presence of Interference,” IEEE Transactions on Communications, vol. 53, No. 3, pp. 515-525, March 2005.[pdf]

X. Cai, Y. Yao, and G. B. Giannakis, “Achievable Rates in Low-Power Relay-Links over Fading Channels,” IEEE Transactions on Communications, vol. 53, No. 1, pp. 184-194 January 2005.[pdf]

X. Cai and G. B. Giannakis, “Adaptive PSAM Accounting for Channel Estimation and Prediction Errors,” IEEE Transactions on Wireless Communications, vol. 4, no. 1, pp.246-256, January 2005.[pdf]

X. Cai and G. B. Giannakis, “Performance Analysis of Combined Transmit Selection Diversity and Receive Generalized Selection Combining in Rayleigh Fading Channels,” IEEE Transactions on Wireless Communications, vol. 3, no. 6, pp. 1980-1983, November 2004. [pdf]

Y. Sun and X. Cai, “Multiuser Detection for CDMA Random Access Network with Retransmission Diversity,” IEEE Transaction on Signal Processing, vol. 52, no. 3, pp. 826-832, March 2004.[pdf]

X. Cai, S. Zhou, and G. B. Giannakis, “Group-Orthogonal Multi-Carrier CDMA,” IEEE Transactions on Communications, vol. 52, no. 1, pp. 90-99, January 2004.[pdf]

X. Cai and G. B. Giannakis, “Error Probability Minimizing Pilots for OFDM with M-PSK Modulation over Rayleigh Fading Channels,” IEEE Transactions on Vehicular Technology, vol. 53, no. 1, pp. 146-155, January 2004. [pdf]

X. Cai and G. B. Giannakis, “Benchmarking Performance and Suppressing Inter-Carrier Interference in Wireless Mobile OFDM,” IEEE Transactions on Communications, vol. 51, no. 12, pp. 2047-2056, December 2003. [pdf]

X. Cai and G. B. Giannakis, “A Two Dimensional Channel Simulation Model for Shadow Fading Processes,” IEEE Transactions on Vehicular Technology, vol. 52, no. 6, pp. 1558-1567, November 2003.[pdf], [ Corrections], [Matlab Codes: USM, MUSM, MCM]

X. Cai, Y. Sun, and A. N. Akansu, “Performance of DS-CDMA Random Access Systems with Packet Combining in Fading Channels,” IEEE Transactions on Wireless Communications, vol. 2, no. 3, pp. 413-419, May 2003.[pdf]

X. Cai, H. Ge, and A. N. Akansu, “Blind Reduced-Rank MMSE Detector for DS-CDMA Systems,” EURASIP Journal on Applied Signal Processing, vol. 2002, no. 12, pp. 1365-1376, Dec. 2002. [pdf]

H.-H. Chen and X. Cai, “Optimization of Transmitter and Receiver Filters for OQAM-OFDM Systems Using Nonlinear Programming,” IEICE Transactions on Communications, vol. E80-B, no. 11, pp. 1680-1687, Nov. 1997.[pdf]

Journal (In Review)

W. Zhao, X. Cai, and G. B. Giannakis, “Efficient ML Decoding of Linear Block Codes,” IEEE Transactions on Communications, submitted February 2005.
Conference

X. Cai and G. B. Giannakis, “Detection of Differentially Expressed Genes Using Clustered Microarray Data ” Proc. of IEEE International Workshop on Genomic Signal Processing and Statistics, New Port, Rhode Island, May 22 - 24, 2005.

X. Cai, G. B. Giannakis, and M. Zoltowski, “Space-Time Spreading and Block Coding for Correlated Fading Channels in the Presence of Interference, ” Proc. of Signal Proc. Workshop on Advances in Wireless Communications, Lisbon, Portugal, July 11-14, 2004.

Y. Yao, X. Cai, and G. B. Giannakis, “On Energy Effitiency of Relay Transmission,” Proc. of the Intl. Symp. on Info. Theory, Chicago, IL, June 27 - July 2, 2004.

A. Ribeiro, X. Cai, and G. B. Giannakis, “Symbol Error Probabilities for General Cooperative Links,” Proc. of Intl. Conf. on Communications, Paris, France, June 20-24, 2004.

A. Ribeiro, X. Cai, and G. B. Giannakis, “Opportunistic Multipath for Bandwidth-Efficient Cooperative Networking,” Proc. of Intl. Conf. on Acoustics, Speech and Signal Processing, Montreal, Quebec, Canada, May 17-21, 2004.

Y. Yu, X. Cai, and G. B. Giannakis, “On the Instability of Slotted Aloha with Capture,” Proc. of Wireless Comm. and Networking Conf., Atlanta, GA, March 21-25, 2004.

X. Cai, Y. Yao, and G. B. Giannakis, “Achievable Rates for Low-Power Relayed Transmissions over Fading Channels,” Proc. of 38th Conf. on Info. Sciences and Systems, Princeton Univ., NJ, March 17-19, 2004.

W. Zhao, X. Cai, and G. B. Giannakis, “ An Efficient Maximum-Likelihood Decoding Algorithm for Linear Block Codes,” Proc. of 38th Conf. on Info. Sciences and Systems, Princeton Univ., NJ, March 17-19, 2004.

X. Cai, and G. B. Giannakis, “Error Probability Minimizing Pilots for OFDM over Fading Channels,” Proc. of 6th Baiona Workshop on Signal Proc. in Communications, Baiona, Spain, September 8-10, 2003.

X. Cai, and G. B. Giannakis, “Differential Space-Time Modulation with Transmit-Beamforming for Correlated MIMO Fading Channels,” Proc. of Intl. Conf. on Acoustics, Speech and Signal Processing, Hong Kong, April 6-10, 2003.

X. Cai, and G. B. Giannakis, “Adaptive Modulation and Adaptive Pilot Assisted Estimation and Prediction of Rapidly Fading Channels,” Proc. of the 37th Conf. on Info. Sciences & Systems, Baltimore, Maryland, March 12-14, 2003.

X. Cai and G. B. Giannakis, “Low-complexity ICI suppression for OFDM over time- and frequency-selective Rayleigh fading channels,” Proc. of 36th Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, CA, November 3-6, 2002.

X. Cai, S. Zhou, and G. B. Giannakis, “Group-Orthogonal Multi-Carrier CDMA,” Proc. of MILCOM Conf., Anaheim, CA, October 7-10, 2002.

X. Cai, Y. Sun and A. N Akansu, “Performance of slotted CDMA random access system with packet combing in fading channel,” Proc. of CISS 2001, The John Hopkins University, March 23-25 2001.

X. Cai and A. N. Akansu, “Multicarrier CDMA systems with transmit diversity,” Proc. of VTC'2000 Fall, Boston, MA, Oct. 2000.

X. Cai, H. Ge, and A. N. Akansu, “Reduced rank minimum variance receiver for asynchronous CDMA Systems,” Proc. of ICC'2000, New Orleans, LA, pp 1030-1033, June 2000.

X. Cai and A. N. Akansu, “A subspace method for blind channel identification in OFDM systems,” Proc. of ICC'2000, New Orleans, LA, pp 929-933, June 2000.
M. Ramkumar, A.N. Akansu, X. Cai, “Floating signal constellations for multimedia steganography,” Proc. of ICC'2000, New Orleans, LA, June 2000.

X. Cai, H. Ge, and A. N. Akansu, “Low-rank minimum variance CDMA receiver in multipath channels,” Proc. of ICASSP 2000, pp. 2877-2880, June 2000.

X. Cai, H. Ge, and A. N. Akansu, “On the conditioned signal-to-noise ratio of linear MMSE estimators,” Proc. of CISS 2000, Princeton, NJ, pp. FA2:1-5, Mar. 2000.

K. Wang, X. Cai, and H. Ge, “A novel space-time rake receiver for DS-CDMA systems,” Proc. of CISS 2000, Princeton, NJ, pp. FA3:12-17, Mar. 2000.

X. Cai, H. Ge, and A. N. Akansu, “Low-rank MMSE detector for synchronous DS-CDMA,” Proc. of 33th Asilomar Conference on Signals,Systems and Computer, Pacific Grove, CA, pp 940-944, Oct. 1999.

H.-H. Chen and X. Cai , “Waveform optimization for OQAM-OFDM systems by using nonlinear programming algorithms,” Proc. of VTC'97, Phoenix, AZ, pp 1385-1389, May 1997.

EXPERIENCE:
Technical Staff Member at Lucent Technologies, NJ, from February 2001 to June 2001
Senior System Engineer in Sony Technology Center, CA, from July 2001 to October 2001
Postdoctoral fellow in the Department of Electrical and Computer Engineering, University of Minnesota, Twin Cities, from November 2001 to July 2004
Department of Electrical and Computer Engineering, Univesity of Miami, Assistant Professor, since August, 2004