Title :
An iterative multiuser decoder for asynchronous BPSK users
Author_Institution :
Commun. Res. Centre, Ottawa, Ont., Canada
Abstract :
A multiuser decoding algorithm is presented for asynchronous BPSK users. The algorithm is derived from iterative techniques for cross-entropy minimization and has similarities with turbo decoding. Simulations show the algorithm asymptotically achieves single user performance. The complexity per bit of the decoder is O(23K+ 2) per bit per iteration where K is the number of users and K is the constraint length of the code
Keywords :
code division multiple access; computational complexity; iterative decoding; minimum entropy methods; multiuser channels; phase shift keying; CDMA; asynchronous BPSK users; code constraint length; complexity; cross-entropy minimization; iterative multiuser decoder; multiuser decoding algorithm; simulations; single user performance; turbo decoding; Binary phase shift keying; Computational modeling; Detectors; Distributed computing; Iterative algorithms; Iterative decoding; Matched filters; Minimization methods; Multiaccess communication; Pulse modulation;
Conference_Titel :
Information Theory, 1998. Proceedings. 1998 IEEE International Symposium on
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-5000-6
DOI :
10.1109/ISIT.1998.709028
