[1]徐红梅,吴乐南.LDPC码在基于类二分法SVM的MPPSK信号检测中的应用[J].东南大学学报(自然科学版),2014,44(3):468-471.[doi:10.3969/j.issn.1001-0505.2014.03.003]
 Xu Hongmei,Wu Lenan.Application of LDPC code in signal detection of MPPSK based on similar-dichotomy SVM[J].Journal of Southeast University (Natural Science Edition),2014,44(3):468-471.[doi:10.3969/j.issn.1001-0505.2014.03.003]
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LDPC码在基于类二分法SVM的MPPSK信号检测中的应用()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第3期
页码:
468-471
栏目:
信息与通信工程
出版日期:
2014-05-16

文章信息/Info

Title:
Application of LDPC code in signal detection of MPPSK based on similar-dichotomy SVM
作者:
徐红梅吴乐南
东南大学信息科学与工程学院, 南京 210096
Author(s):
Xu Hongmei Wu Lenan
School of Information Science and Engineering, Southeast University, Nanjing 210096, China
关键词:
多元位置相移键控 类二分法SVM LDPC编解码 进制转化
Keywords:
M-ary position phase shift keying similar-dichotomy support vector machine(SVM) low-density parity check(LDPC)codec hex conversion
分类号:
TN911.25
DOI:
10.3969/j.issn.1001-0505.2014.03.003
摘要:
为了降低基于多分类支持向量机(SVM)的多元位置相移键控(MPPSK)系统的信号检测复杂度,同时提升误码率性能,提出一种新的类似于二分法的SVM多分类方法.然后在此基础上引入LDPC信道编码,考虑到SVM输出转化为多进制后验概率的复杂性,采用简单的位比特翻转法进行LDPC译码,并利用一种进制转化机制简化多进制LDPC译码.结果显示,类二分法SVM判决方法可以有效降低多分类SVM检测算法的复杂度,且其检测性能相较于已有的MPPSK信号检测算法显著提升;所采用的进制转化机制实现了基于SVM多分类判决的MPPSK系统中的多进制LDPC编解码;引入LDPC编码以后,MPPSK信号性能进一步显著提升.
Abstract:
To decrease the complexity of signal detection of M-ary position phase shift keying(MPPSK)system based on multi-classification support vector machines(SVM)and to improve the bit error rate(BER), an algorithm named similar-dichotomy SVM is proposed. Based on the proposed algorithm, low-density parity check(LDPC)code is introduced. Considering the complexity of transferring SVM output into M-ary posterior probability, the bit flipping algorithm is chosen as the LDPC decoding method, and the hex conversion strategy is used to simplify M-ary LDPC decoding. The results indicate that the complexity of multi-classification SVM is significantly decreased by similar-dichotomy SVM, and its demodulation performance is markedly promoted compared with other MPPSK detection methods. The hex conversion strategy realizes the M-ary LDPC codec in the MPPSK system based on the SVM multi-classification algorithm. The signal detection performance is further improved after the adoption of LDPC code.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2013-11-17.
作者简介: 徐红梅(1989—),女,硕士生;吴乐南(联系人),男,博士,教授,博士生导师,wuln@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(61271204)、广东省重大科技专项资助项目(2010A080402003).
引用本文: 徐红梅,吴乐南.LDPC码在基于类二分法SVM的MPPSK信号检测中的应用[J].东南大学学报:自然科学版,2014,44(3):468-471. [doi:10.3969/j.issn.1001-0505.2014.03.003]
更新日期/Last Update: 2014-05-20