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Spatially Coupling Data Transmission for Multiple Access Communications

December 16, 2013
5:00 pmto6:30 pm

The Communications Society Chapter and the Signal Processing / Microwave Theory and Techniques Society Joint Chapter of the IEEE Canadian Atlantic Section wish to invite you to the following presentation.

Title of Talk: Spatially Coupling Data Transmission for Multiple Access Communications
Speaker: Dr. Dmitri Truhachev, Dalhousie University
Time: 5:00pm – 6:30pm, Monday, December 16th, 2013
Place: Dalhousie University, Sexton Campus, Room B311 • Halifax • NS • Canada

About the Talk:

We consider a signaling format where information is modulated via a superposition of independent data streams. Each data stream is formed by replication and permutation of encoded information bits. The relations between data bits and modulation symbols transmitted over the channel can be represented in the form of a sparse graph. The modulated streams are transmitted with a time offset enabling spatial coupling of the sparse modulation graphs.

We prove that a two-stage demodulation/decoding method, in which iterative demodulation based on symbol estimation and interference cancellation is followed by parallel error correction decoding, achieves capacity on the additive white Gaussian noise (AWGN) channel. In addition, we show that the proposed signaling format is universal for the multiple access channel and the entire capacity region can be achieved asymptotically.

About the Presenter:

Dr. Truhachev received a B.S. degree, with distinction, in applied mathematics from Saint Petersburg State Electrotechnical University, Russia, in 1999, and a Ph.D. degree in electrical engineering from Lund University, Lund, Sweden, in 2004. Dr. Truhachev is currently an Assistant Professor with the Department of Electrical and Computer Engineering, Dalhousie University, Canada. Prior to that, he held postdoctoral fellow and research associate positions at the University of Alberta.

Dr. Truhachev is a recipient of the Alberta Ingenuity Postdoctoral Fellowship award. He served as a Co-chair of the Canadian Summer School on Communications in 2011. His major research interests include communications and error control coding with emphasis on graphical models and iterative processing on graphs, information theory, ad hoc wireless networks, and bioinformatics.

 
 
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