Multicarrier CDMA Multiuser Detection Algorithm Based on Belief Propagation

Konferenz: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
11.09.2005 - 14.09.2005 in Berlin, Germany

Tagungsband: PIMRC 2005

Seiten: 5Sprache: EnglischTyp: PDF

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Ting, Pangan; Wen, Chao-Kai; Hsu, Jen-Yuan; Chuang, Wei-Ping (CCL/Industrial Technology Research Institute, Hsinchu, Taiwan, ROC)
Chen, Jung-Chieh (National Kaohsiung Normal University, Kaohsiung, Taiwan, ROC)

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 suboptimalmultiuser 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 biterror-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.