Title :
Enhanced CDMA communications using compressed-sensing reconstruction methods
Author :
Aggarwal, Vaneet ; Applebaum, Lorne ; Bennatan, Amir ; Calderbank, A. Robert ; Howard, Stephen D. ; Searle, Stephen J.
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., Princeton, NJ, USA
fDate :
Sept. 30 2009-Oct. 2 2009
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.
Keywords :
Reed-Muller codes; Walsh functions; code division multiple access; encoding; signal reconstruction; CDMA; Walsh sequences; code division multiple access communications; compressed-sensing reconstruction methods; decoding algorithm; downlink communications; low-complexity multiuser detection; second order Reed-Muller sequences; signals reconstruction; AWGN; Decoding; Downlink; Interference cancellation; Multiaccess communication; Multiuser detection; Parity check codes; Reconstruction algorithms; Silicon carbide; Transmitters;
Conference_Titel :
Communication, Control, and Computing, 2009. Allerton 2009. 47th Annual Allerton Conference on
Conference_Location :
Monticello, IL
Print_ISBN :
978-1-4244-5870-7
DOI :
10.1109/ALLERTON.2009.5394537
