北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (6): 32-36.doi: 10.13190/jbupt.200906.32.lil

• 论文 • 上一篇    下一篇

一种新的选择BICM-ID混合调制映射方法

李琳;袁超伟;杨睿哲   

  1. (1.北京邮电大学 信息与通信工程学院, 北京 100876;
    2.北京工业大学 电子信息与控制工程学院, 北京 100124)
  • 收稿日期:2009-03-03 修回日期:2009-10-21 出版日期:2009-12-28 发布日期:2009-12-28
  • 通讯作者: 李琳

A New Method of Choosing Irregular Modulation Mapping in BICMID System

LI Lin;YUAN Chao-wei;YANG Rui-zhe   

  1. (1.School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    2.College of Electronic Information and Control Engineering, Beijing University
    of Technology, Beijing 100124, China)
  • Received:2009-03-03 Revised:2009-10-21 Online:2009-12-28 Published:2009-12-28

摘要:

提出了一种基于系统外部信息转移图(EXIT)的改进分析方法,利用该方法可以选择比特交
织编码调制迭代译码(BICM-ID)系统中混合调制映射的方案,与EXIT图分析方法不同,该方法利用了系统外部交互信息与整个信噪比区域变化(EMI-SNR)的对应关系. 仿真结果表明
,使用EMI-SNR图的分析方法,可以在BICM-ID系统中不同的信噪比区域内选择不同的混合
调制映射方案,并且能粗略地估算出系统误码率曲线在不同信噪比区域内的高低变化.

关键词: 外部信息转移图, 混合调制映射, 外部交互信息与信噪比变化关系图

Abstract:

A new analysis method which chooses the performance of the irregular modulation mapping schemes in bit interleaved coded modulation with iterative decoding(BICM-ID) system is proposed based on the extrinsic information transfer (EXIT) chart, the difference from EXIT chart analysis method is the proposed method utilizes the corresponding relationship between the extrinsic mutual information and the whole signal to noise ratio region . The simulation results show that the proposed method can effectively choose the different irregular modulation mapping schemes in the different signal to noise ratio region and can roughly evaluate the scope of system bit error rate curve in BICM-ID system.

Key words: extrinsic information transfer chart, irregular modulation mapping, extrinsic mutual information-signal noise ratio chart