標題: Optimal two-stage decoupled partial PIC receivers for multiuser detection
作者: Hsieh, YT
Wu, WR
電信工程研究所
Institute of Communications Engineering
關鍵字: direct-sequence code-division multiple-access (DS-CDMA);multiple-access interference;multiuser detection;parallel interference cancellation
公開日期: 1-一月-2005
摘要: Parallel interference cancellation (PIC) is considered a simple yet effective multiuser detector for direct-sequence code-division multiple-access (DS-CDMA) systems. However, system performance may deteriorate due to unreliable interference cancellation in the early stages. Thus, a partial PIC detector in which partial cancellation factors (PCFs) are introduced to control the interference cancellation level has been developed as a remedy. Although PCFs are crucial, complete solutions for their optimal values are not available. In this paper, we consider a two-stage decoupled partial PIC receiver. Using the minimum bit error rate (BER) criterion, we derive a complete set of optimal PCFs. This includes optimal PCFs for periodic and aperiodic spreading codes in additive white Gaussian channels and multipath channels. Simulation results show that our theoretical optimal PCFs agree closely with empirical ones. Our two-stage partial PIC using derived optimal PCFs outperforms not only a two-stage, but also a three-stage full PIC.
URI: http://dx.doi.org/10.1109/TWC.2004.840248
http://hdl.handle.net/11536/24823
ISSN: 1536-1276
DOI: 10.1109/TWC.2004.840248
期刊: IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
Volume: 4
Issue: 1
起始頁: 112
結束頁: 127
顯示於類別:期刊論文


文件中的檔案:

  1. 000226347600015.pdf