Title :
Multicarrier CDMA Multiuser Detection Algorithm Based on Belief Propagation
Author :
Ting, Pangan ; Wen, Chao-Kai ; Chen, Jung-Chieh ; Hsu, Jen-Yuan ; Chuang, Wei-Ping
Author_Institution :
CCL, Ind. Technol. Res. Inst., Hsinchu
Abstract :
Recently, several published papers have been drawing attention to multicarrier code division multiple access (MC-CDMA) systems, especially their applications in the field of broadband wireless communications. In such applications, existing sub-optimal multiuser detectors (MUDs) usually do not achieve acceptable performance. Unfortunately, it is NP-hard to implement an optimum MUD algorithm. In this paper, to make the optimum MUD feasible, we put together a low-complexity iterative MUD algorithm for MC-CDMA systems based on Pearl´s belief propagation (BP) scheme. The BP-based MUD algorithm can be implemented in a practical time scale. The analytical dynamic bit-error-rate (BER) performance of the BP-based iterative detector can be traced accurately and its BER in the stationary state is shown to achieve the performance obtained by the optimum MUD algorithm
Keywords :
code division multiple access; error statistics; iterative methods; multiuser detection; BER; belief propagation; broadband wireless communications; code division multiple access; dynamic bit-error-rate; iterative detector; multicarrier CDMA multiuser detection; Belief propagation; Bit error rate; Broadband communication; Detectors; Iterative algorithms; Multiaccess communication; Multicarrier code division multiple access; Multiuser detection; Performance analysis; Wireless communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on
Conference_Location :
Berlin
Print_ISBN :
9.7838007291e+012
DOI :
10.1109/PIMRC.2005.1651441