一种改进的SISO多用户检测算法

应用科学学报 ›› 2006, Vol. 24 ›› Issue (5): 469-473.

一种改进的SISO多用户检测算法

梅中辉, 殷玮玮, 吴乐南

东南大学无线电工程系, 江苏南京 210096

收稿日期:2005-05-13 修回日期:2005-07-18 出版日期:2006-09-30 发布日期:2006-09-30
作者简介:梅中辉,博士生,研究方向:无线通信中低复杂度联合检测算法、IPPC码技术,E-mail:mei-hui@sohu.com;吴乐南,教授,博导,研究方向:多媒体信号处理技术、数字广播技术、超常技术,E-mail:wuln@seu.edu.cn
基金资助:
国家自然科学基金资助项目(60472054)

Enhanced Soft-Input Soft-Output Multiuser Detection Algorithm

MEI Zhong-hui, YIN Wei-wei, WU Le-nan

Department of Radio Engineering, Southeast University, Nanjing 210096, China

Received:2005-05-13 Revised:2005-07-18 Online:2006-09-30 Published:2006-09-30

摘要/Abstract

摘要： 根据信道译码器所提供的发送比特的先验信息,对数据联合算法(PDA)进行了改进,在仅有较小性能损失的前提下,进一步降低了PDA算法的计算复杂度.

关键词: SISO多用户检测器, 多址干扰, PDA算法

Abstract: The iterative multiuser detector is made up by a soft-input soft-output (SISO) multiuser detector concatenated with a SISO channel decoder.The computational complexity of the optimal SISO algorithm grows exponentially with the number of users, so it can not be well applied to the system with large number of active users.The probabilistic data association (PDA) algorithm is a novel SISO multiuser detection algorithm, which has a good performance approximating to that of the optimal algorithm and low computational complexity of order O(K³).In this paper, we make an improvement for the PDA algorithm to further reduce the computational complexity of the PDA algorithm with just a small lo ss in performance.

Key words: multiuser access interfenrence (MAI), SISO multiuser detector, PDA algorithm

中图分类号:

TN914

梅中辉, 殷玮玮, 吴乐南. 一种改进的SISO多用户检测算法[J]. 应用科学学报, 2006, 24(5): 469-473.

MEI Zhong-hui, YIN Wei-wei, WU Le-nan. Enhanced Soft-Input Soft-Output Multiuser Detection Algorithm[J]. Journal of Applied Sciences, 2006, 24(5): 469-473.