Multistage Parallel Interference Cancellation Based on Chase Algorithm

摘要：

A key issue in a multistage parallel interference cancellation (PIC) scheme is to improve the hard decision accuracy after matched filters (MFs). For achieving this purpose, most PIC schemes focus on choosing the suitable weight for each user in each stage but keeping the hard decision values after MFs intact. This paper presents a new PIC scheme that uses Chase algorithm 5 to edit the possible hard decision combinations and selects the one minimizing a cost function as the final hard decision result for performing the interference cancellation. Performance and complexity comparisons are presented among Chase-PIC, normalized least-meansquare adaptive multistage PIC (NLMS-PIC) schemes 4 and their variants. A new PIC scheme using NLMS as the earlier stages and Chase in the later stages is proposed, which can achieve a better performance than multistage NLMS-PIC but with lower complexity.

关键词： parallel interference cancellation CDMA multi-user detection Chase algorithm

作者: Liu Feng M.Reza Soleymani

作者单位: Wireless and Satellite Communications Lab.Department of Electrical and Computer Engineering,Concordia University Montreal,Quebec,Canada H3G 1M8

会议类型: 国际会议

会议名称: 第二届IEEE无线通讯、网络技术暨移动计算国际会议

会议地点: 武汉

会议语种:英文

在线出版日期: 2006-09-01（万方平台首次上网日期，不代表论文的发表时间）