摘要
针对LDPC编码、多进制相移键控(M-PSK)调制的跳频通信信号受随机相位偏转影响的问题,提出一种基于消息传递的迭代检测译码算法。该算法在相位检测模块和译码器之间传递消息并反复迭代;通过相位离散化方法解决消息计算中的积分难题。仿真结果表明,提出的算法可以有效降低随机相位偏转的影响,取得了很好的误比特率性能。
For the affection on LDPC encoded M-ary phase-shift keying （M-PSK） signals in frequency-hopping communications caused by random phase-shift, an iterative detection and decoding algorithm based on message- passing is proposed. Messages are derived and iteratively passed between the detection module and the decoder. At the same time, the method of phase discretization is used to solve the integration difficulty in message computation. By simulations, it＇ s verified that the proposed algorithm can effectively alleviate the effect of random phase-shift to the system and reach an outstanding bit error rate （BER） performance.
出处
《科学技术与工程》
北大核心
2014年第16期78-82,共5页
Science Technology and Engineering
基金
国家自然科学基金(61231011
61132002)
973国家重点基础研究发展规划项目(2013CB329000)资助
关键词
跳频通信
随机相位偏转
消息传递
迭代检测译码
frequency-hopping communications random phase-shift message-passing iterative detection and decoding
