Iterative demapping and decoding for multilevel modulation

被引：0
|
作者：
ten Brink, S [1 ]
Speidel, J [1 ]
Yan, RH [1 ]
机构：
[1] Univ Stuttgart, Inst Telecommun, D-7000 Stuttgart, Germany
来源：
GLOBECOM 98: IEEE GLOBECOM 1998 - CONFERENCE RECORD, VOLS 1-6: THE BRIDGE TO GLOBAL INTEGRATION | 1998年
关键词：
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In recent times iterative decoding algorithms for spectrally efficient modulation have become a vital field of research in digital communications. In this paper we show how iterative demapping reduces the bit error rate in conventional communication systems applying multilevel modulation combined with simple channel coding. For this the soft demapping has to be modified in order to accept a priori information. The system can be regarded as a serially concatenated iterative decoding scheme whereby the inner decoder is replaced by the soft demapping device. A design rule based on mutual information to find the 'best' mapping is proposed. Numerical results are presented for 4-PAM and 16-QAM examples.
引用
收藏
页码：579 / 584
页数：6
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