电信科学 ›› 2012, Vol. 28 ›› Issue (2): 95-98.doi: 10.3969/j.issn.1000-0801.2012.02.017

• 研究与开发 • 上一篇    下一篇

一种改进的基于FG-Turbo多用户检测的软干扰消除算法

王忠勇1,任晓敏1,段琳琳1,2,肖岩1   

  1. 1 郑州大学信息工程学院 郑州 450001
    2 解放军信息工程大学 郑州 450001
  • 出版日期:2012-02-15 发布日期:2012-02-15
  • 基金资助:
    国家自然科学基金资助项目

A Modified Soft Interference Cancellation Algorithm Based on FG-Turbo Multiuser Detection

Zhongyong Wang1,Xiaomin Ren1,Linlin Duan1,2,Yan Xiao1   

  1. 1 College of Information Engineering,Zhengzhou University,Zhengzhou 450001,China
    2 The PLA Information and Engineering University,Zhengzhou 450001,China
  • Online:2012-02-15 Published:2012-02-15

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3

摘要：

基于因子图与和积算法，给出了基于LDPC 的FG-Turbo 多用户检测扩展模型，仿真比较了最优MAP 算法和软干扰消除算法的性能，并提出了一种基于敏感比特的软干扰估计新方法。仿真结果表明，改进后的软干扰消除算法在复杂度不变的情况下，有效地改善了系统性能。

关键词: 因子图, 和积算法, FG-Turbo多用户检测, 软干扰消除, 敏感比特

Abstract:

In this paper,based on the factor graph and sum-product algorithm,we get the extend model of FG-Turbo multiuser detection with LDPC coded,simulate and compare the performances of MAP algorithm and soft interference cancellation algorithm,and propose a new method to estimate interference symbols,that is based on sensitive bits algorithm.Simulation results show that in the case of the computational complexity unchanged,the soft interference cancellation algorithm modified can improve the performance of system effectively.

Key words: factor graph, sum-product algorithm, FG-Turbo multiuser detection, soft interference cancellation, sensitive bit

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