Title :
Design of serially concatenated coded CDMA system
Author :
Shi, Zhenning ; Schlegel, Christian
Author_Institution :
Utah Univ., Salt Lake City, UT, USA
Abstract :
A code-division multiple-access (CDMA) system in conjunction with serial concatenation of FEC codes is considered. Iterative decoding strategies are used at the receiver. The component decoders are functionally described by variance transfer (VTR) charts. Pinch-off SNRs, where the iterative decoding starts to function, are precisely predicted by this approach. Designs of the multiuser detection (MUD) method and the component FEC codes have been carried out and system performance to within about 1 dB of the Shannon capacity of the multiple-access channel is demonstrated.
Keywords :
channel coding; code division multiple access; concatenated codes; forward error correction; iterative decoding; multiuser channels; signal detection; spread spectrum communication; turbo codes; CDMA system design; FEC codes; Shannon capacity; asynchronous DS-CDMA system; component decoders; multiple-access channel; multiuser detection; per-user MMSE algorithm; pinch-off SNR; serially concatenated coded CDMA system; system performance; turbo iterative decoding; variance transfer charts; Concatenated codes; Error correction; Forward error correction; Interference; Iterative decoding; Multiaccess communication; Multiuser detection; Scheduling; System performance; Video recording;
Conference_Titel :
Communications, 2002. ICC 2002. IEEE International Conference on
Print_ISBN :
0-7803-7400-2
DOI :
10.1109/ICC.2002.997178
