Title :
Performance of iterative multiuser receiver for turbo-coded DS-CDMA
Author :
Vu, Huy G. ; Rajatheva, R.M.A.P. ; Fernando, W.A.C.
Author_Institution :
Dept. of Electr. Eng., Saskatchewan Univ., Sask., Canada
Abstract :
In this paper, a low complexity iterative multiuser receiver is analyzed for a turbo-coded CDMA system. The receiver includes a soft multiuser detector and the decoders for users. The simulation considers an uplink asynchronous transmission over a correlated frequency selective fading channel. The results obtained show that the performance of the receiver approaches the single user performance after only two iterations. Compared with the two-stages/decoder scheme, the performance of iterative multiuser receivers is improved significantly. This improvement illustrates the effect of combined decoding and interference cancellation instead of the separate approach. However, this gain is the trade-off for the complexity of a turbo decoder.
Keywords :
code division multiple access; fading channels; interference suppression; iterative decoding; multiuser detection; radio receivers; radiofrequency interference; spread spectrum communication; turbo codes; combined decoding; correlated frequency selective fading channel; direct sequence code division multiple access; interference cancellation; iterations; iterative multiuser receiver; soft multiuser detector; turbo decoder; turbo-coded DS-CDMA; uplink asynchronous transmission; Detectors; Fading; Iterative algorithms; Iterative decoding; Iterative methods; Multiaccess communication; Multiple access interference; Multiuser detection; Telecommunications; Turbo codes;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1207094
