Modified SMC method of blind multiuser detection for DS-CDMA systems over fading channels

作者：Yu Qian; Bi Guoan^*; Zhang Liren

来源：Wireless Personal Communications, 2007, 43(4): 1339-1349.

DOI：10.1007/s11277-007-9306-z

• multiuser detection
• fading channels
• sequential Monte Carlo
• Cholesky factorization

This paper presents the application of sequential Monte Carlo (SMC methodology for blind detection in wireless direct sequence code division multiple access (DS-CDMA) systems over fading channels. It is known that the conventional SMC method requires a high-computational complexity that grows exponentially with the number of active users. This paper proposes a solution to this problem by employing Cholesky factorization to decompose the observed data into separate components for each user and then the parameters of each user are estimated with the SMC inference method under the decision feedback framework. Based on these concepts, an efficient blind decision feedback SMC (DF-SMC) receiver is developed for differentially encoded DS-CDMA systems. Simulation results demonstrate the promising performance of the proposed receiver for both flat fading and frequency-selec tive fading channels.

• 出版日期2007-12
• 单位南阳理工学院