Enhanced CDMA communications using compressed-sensing reconstruction methods

Authors:
Vaneet Aggarwal;Lorne Applebaum;Amir Bennatan;A. Robert Calderbank;Stephen D. Howard;Stephen J. Searle
Affiliations:
Department of Electrical Engineering, Princeton University, NJ;Department of Electrical Engineering, Princeton University, NJ;Program in Applied and Computational Mathematics, Princeton University, NJ;Department of Electrical Engineering, Princeton University, NJ;Defence Science & Technology Organisation, Edinburgh, Australia;Electronic & Electrical Engineering, The University of Melbourne, Victoria, Australia
Venue:
Allerton'09 Proceedings of the 47th annual Allerton conference on Communication, control, and computing
Year:
2009

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Abstract

We propose a simple method for downlink communications based on second order Reed-Muller sequences which generalize the Walsh sequences that are used in orthogonal CDMA. In our approach, coding occurs at the chip level (i.e. we use a spreading factor of 1) and different users are not orthogonalized. Our decoding algorithm is borrowed from work on fast reconstruction of signals for compressed-sensing. This algorithm allows for low-complexity multiuser detection.