Welcome to Xiaojun’s web page!

I am pursuing my Ph.D. degree (and happiness) at WINLAB (wireless information network laboratory), Department of Electrical and Computer Engineering, Rutgers University, New Brunswick/ Piscataway, NJ. My advisor is Prof. Predrag Spasojevic.

I worked with Prof. Yingbo Hua at University of California, Riverside, CA, from 2003 to 2005 before joining WINLAB. During the summer of 2008, I worked as a research engineer intern at DoCoMo, Communications Laboratories USA, Inc., Palo Alto, CA, supervised by Dr. Sean Ramprashad and Dr. Haralabos Papadopoulos.

Research

My research interests are in the general areas of wireless communication, information and coding theory, and signal processing. I have been working on multi-antenna, cooperative and relay systems, and physical layer security for wireless communication. Currently, I focus on distributed and coordinated actions in wireless networks.

Recent Publications

X. Tang, R. Liu, P. Spasojevic, and H. V. Poor, A Broadcast Approach To Secret Key Generation Over Slow Fading Channels, IEEE Transactions on Information Theory, submitted.

X. Tang, R. Liu, P. Spasojevic, and H. V. Poor, Interference Assisted Secret Communication, IEEE Transactions on Information Theory, to appear

X. Tang, R. Liu, P. Spasojevic, and H. V. Poor, Secret-Key Generation For Fading Wireless Channels , in Proc. of Workshop on Information Theory and Applications (ITA 2010), UCSD, La Jolla, CA, Jan. 31 - Feb. 5, 2010.

X. Tang, R. Liu, P. Spasojevic, and H. V. Poor, Secret-Key Sharing Based on Layered Broadcast Coding over Fading Channels, in Proc. of IEEE International Symposium on Information Theory (ISIT 2009), Seoul, Korea, Jun. 28 –Jul. 3, 2009

X. Tang, S. A. Ramprashad, and H. Papadopoulos, Multi-Cell User Scheduling and Random Beamforming Strategies for Downlink Wireless Communications, in Proc. of IEEE 70th Vehicular Technology Conference (VTC 2009), Anchorage, Alaska, Sep. 20-23, 2009.

X. Tang, R. Liu, P. Spasojevic, and H. V. Poor, The Gaussian Wiretap Channel With a Helping Interferer, in Proc. of IEEE International Symposium on Information Theory (ISIT 2008), Toronto, Ontario, Canada, Jul. 6-11, 2008.

X. Tang, R. Liu, P. Spasojevic, and H. V. Poor, Interference-Assisted Secret Communication, in Proc. of IEEE Information Theory Workshop (ITW 2008), Porto, Portugal, May 5-9, 2008.

X. Tang, R. Liu, P. Spasojevic, and H. V. Poor, Coding Schemes for Confidential Communications, in Proc. of Workshop on Information Theory and Applications (ITA 2008), UCSD, La Jolla, CA, Jan. 27 - Feb. 1, 2008.

X. Tang, R. Liu, P. Spasojevic, and H. V. Poor, Multiple Access Channels with Generalized Feedback and Confidential Messages, in Proc. of IEEE Information Theory Workshop on Frontiers in Coding Theory (ITW 2007), Lake Tahoe, CA, Sep. 2-6, 2007.

X. Tang, R. Liu, P. Spasojevic, and H. V. Poor, On the Throughput of Secure Hybrid-ARQ Protocols for Gaussian Block-Fading Channels , IEEE Transactions on Information Theory, vol. 55, no. 4, pp.1575 – 1591, Apr. 2009.

X. Tang, R. Liu, and P. Spasojevic, An Achievable Secrecy Throughput of Hybrid-ARQ Protocols for Block Fading Channels, in Proc. of IEEE International Symposium on Information Theory (ISIT 2007), Nice, France, Jun. 24-29, 2007.

X. Tang, R. Liu, and P. Spasojevic, On the Achievable Secrecy Throughput of Block Fading Channels with No Channel State Information at the Transmitter, in Proc. of the 41st Annual Conference on Information Sciences and Systems (CISS 2007), Baltimore, MD, Mar. 14-16, 2007.

Y. Rong, X. Tang, and Y. Hua, "A Unified Framework for Optimizing Linear Non-Regenerative Multicarrier MIMO Relay Communication Systems", IEEE Transactions on Signal Processing, to appear, 2009.

X. Tang and Y. Hua, Optimal Design of Non-regenerative MIMO Wireless Relays, IEEE Transactions on Wireless Communications, vol. 6, no. 4, pp. 1398- 1407, Apr. 2007.

X. Tang and Y. Hua, Optimal Waveform Design for MIMO Relaying, in Proc. of the 6th IEEE International Workshop on Signal Processing Advances for Wireless Communications (SPAWC 2005), New York, NY, Jun. 5-8, 2005.

X. Tang and Y. Hua, Capacity of Ultra-Wideband Power-Constrained Ad-hoc Networks, IEEE Transactions on Information Theory, vol. 54, no. 2, pp. 916-920, Feb. 2008.

Teaching

As a graduate teaching assistant, I helped undergraduate students in several ECE courses. My duties include teaching recitation / lab classes, teaching review classes, grading exams / projects, and holding office hours. I received an award of outstanding teaching assistant for the calendar year 2004-2005 at University of California, Riverside.

· Rutgers University, New Brunswick, NJ

§ ECE321, Probability and Random Processes (Fall 05, Fall 06) ,

§ ECE322, Principles of Communication Systems (Spr.06, Spr. 07).

· University of California, Riverside, CA

§ EE115, Communication Theory (Fall 04) ,

§ EE141, Digital Signal Processing (Fall 03),

§ EE/CS120A, Logic Design (Win. 04, Spr. 04, Spr. 05).

Courses Taken

· Communication theory (A), Information theory and coding (A), Advanced coding theory (A), Wireless communication (A), Spread spectrum communication (A), Communication networks (A), Optimization of communication systems (A-),

· State and parameter estimation (A), Adaptive signal processing (A), Speech recognition and processing (A),

· Linear system theory(A), Linear algebra and its applications(A), Linear programming(A), Stochastic processes(A), Game theory(A), Financial mathematics I (A), Time series analysis(A), Statistical computing (A).

Awards and Honors

· Best Student Paper, IEEE 70th Vehicular Technology Conference (VTC 2009), Anchorage, Alaska.

· Graduate Research Fellowship, Rutgers University, 2007-2008, 2008-2009,

· College Fellowship, University of California, Riverside, 2003-2005,

· Travel Grant to IEEE Information Theory Workshop, Lake Tahoe, CA, 2007,

· Travel Grant to IEEE International Symposium on Information Theory, Seoul, Korea, 2009

· Outstanding Teaching Assistant, University of California, Riverside, 2004-2005.

Professional Services

· Reviewer for

§ IEEE Transactions on Information Theory,

§ IEEE Transactions on Communications,

§ IEEE Transactions on Signal Processing,

§ IEEE Transactions on Wireless Communications,

§ IEEE Signal Processing Letters,

§ IEEE Communication Letters,

§ IEEE Journal on Selected Areas in Communications,

§ EURASIP Journal on Advances in Signal Processing,

§ Signal Processing (Elsevier)

· Reviewer for IEEE conferences/workshops including

§ ISIT (2009, 2008, 2007), ITW (2009, 2008),

§ ICC (2009, 2008), WCNC (2009, 2008), Globecom (2009, 2008, 2007, 2005)

§ PIMRC 2008, Wirelesscom 2006, ICASSP 2005, SPAWC 2005.