Title :
Performance of turbo coded multicarrier CDMA with iterative multiuser detection and decoding
Author :
Kafle, Pudum L. ; Sesay, Abu B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Calgary Univ., Alta., Canada
Abstract :
The performance of a turbo coded MC-CDMA uplink with iterative multiuser detection is evaluated. Optimal likelihood ratios are computed based on the maximum a posteriori criterion using the multiuser signal structure and a priori information of code bits of all other users available from channel decoders. Combining turbo coding and multiuser detection in MC-CDMA has shown performance close to the single user bound with a few iterations of joint detection and decoding. Additionally, a suboptimal approach using soft interference cancellation is also implemented for the uplink transmission and compared with the conventional methods. Simulation results are presented in a Rayleigh multipath fading environment for a typical data transmission scheme
Keywords :
Rayleigh channels; cellular radio; code division multiple access; interference suppression; iterative decoding; multiuser channels; signal detection; turbo codes; MC-CDMA uplink; Rayleigh multipath fading; a priori information; cellular radio; data transmission; iterative decoding; iterative multiuser detection; maximum a posteriori criterion; mobile radio; multicarrier CDMA; multiuser signal structure; optimal likelihood ratios; soft interference cancellation; turbo coding; Data communication; Fading; Forward error correction; Interference cancellation; Iterative decoding; Multiaccess communication; Multicarrier code division multiple access; Multiuser detection; OFDM; Turbo codes;
Conference_Titel :
Electrical and Computer Engineering, 2001. Canadian Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-6715-4
DOI :
10.1109/CCECE.2001.933667
