A Reduced Turbo Multiuser Detector Based on MMSE Criterion

摘要：

Turbo multiuser detection has been a hot research topic for years. Based on minimum mean square error (MMSE) criterion, this paper proposes a kind of reduced Turbo multiuser detection scheme for Turbo encoded DS-CDMA system. By using the standard Log maximum a posteriori (Log-MAP) algorithm to calculate external information and Log likelihood ratio (LLR) of information bits, and taking advantage of the partial outputs of MMSE detector, the proposed multiuser detector can achieve better system performance. It saves the procedures of computing the external information of parity bits using the revised Log-MAP algorithm, reduces the computation cost of channel decoder module, and decreases the number of decoding memorizer. Experiment results show the proposed multiuser detector can achieve better performance with less computation cost.

关键词： Turbo multiuser detection MMSE Log-MAP LLR

作者: Lili Lin

作者单位: College of Information and Electronic Engineering University of Zhejiang Gongshang Hangzhou, Zhejiang, 310018, China

会议类型: 国际会议

会议名称: 2010 International Asia Conference on Optical Instrument and Measurement(2010年IEEE光学仪器与测量国际会议 ACPIM 2010)

会议地点: 深圳

会议语种:英文

页码: 172-176

在线出版日期: 2010-11-20（万方平台首次上网日期，不代表论文的发表时间）