Title :
Computationally efficient iterative multiuser detection and decoding
Author :
Das, Suman ; Erkip, Elza ; Aazhang, Behnaam
Author_Institution :
Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX, USA
Abstract :
We describe an iterative detection and decoding scheme for the uplink in a convolutionally coded direct sequence code division multiple access (DS-CDMA) system. We consider maximum-a-posteriori (MAP) decoding and reduce the complexity through an iterative interference cancelation scheme combined with a suboptimal channel decoding algorithm. The MAP priors are updated at every iteration step. We investigate the performance of this low complexity scheme and observe that it is close to optimal.
Keywords :
cellular radio; channel coding; code division multiple access; computational complexity; convolutional codes; interference suppression; iterative decoding; maximum likelihood decoding; radiofrequency interference; signal detection; spread spectrum communication; DS-CDMA; MAP decoding; computationally efficient iterative multiuser detection; convolutionally coded direct sequence code division multiple access; iterative detection and decoding scheme; iterative interference cancelation scheme; maximum-a-posteriori decoding; performance; suboptimal channel decoding algorithm; uplink; Convolution; Convolutional codes; Detectors; Direct-sequence code-division multiple access; Iterative decoding; Matched filters; Modulation coding; Multiaccess communication; Multiple access interference; Multiuser detection;
Conference_Titel :
Signals, Systems & Computers, 1998. Conference Record of the Thirty-Second Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5148-7
DOI :
10.1109/ACSSC.1998.750939
