文献类型：期刊文献

中文题名：基于预编码的用户间载波相位偏移纠正算法

英文题名：Correction Algorithm of User Carrier Phase Offset Based on Pre-coding

作者：杨永强[1];李淑红[1]

第一作者：杨永强

机构：[1]河南财经政法大学计算机与信息工程学院

第一机构：河南财经政法大学计算机与信息工程学院

年份：2017

卷号：24

期号：9

起止页码：1850-1854

中文期刊名：控制工程

外文期刊名：Control Engineering of China

收录：北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

基金：国家自然科学基金项目(61202285)

语种：中文

中文关键词：物理层;载波相位纠正;异步通信;信道容量;无信通信系统

外文关键词：Physical layer; carrier phase correction; asynchronous communication; channel capacity; wireless communication system

摘要：物理层网络编码可以获得更高的频谱利用率,而用户间载波相位偏移易导致星座图扭曲,为了解决载波相位偏移问题,提出了基于预编码的用户间载波相位偏移纠正算法。首先将相位预失真向量引入到用户符号中,然后根据相位预失真向量对物理层网络编码信号进行相位均衡操作,并对置信传播算法进行相应改进,减少用户间载波相位偏移,最后采用仿真实验对算法的有效性进行了分析。实验结果表明,算法可以有效降低用户间载波相位偏移量,减少了无线通信系统的误码率,增强了无线通信系统的性能。
Physical layer network coding can achieve higher spectrum utilization, and carrier phase offset of users can easily lead to distortion of the constellation diagram. In order to solve the problem of carrier phase shift, a novel correction algorithm of user carrier phase offset based on pre-coding is proposed in this paper. At first, the phase distortion vector is introduced into user symbols, and secondly, phase equilibrium operation of physical layer network coding signals is carried out according to the phase distortion vector, and confidence propagation formula is improved, and carrier phase offset is reduced, finally, simulation experiments are carried out to analyze the effectiveness. Experimental results show that the proposed algorithm can effectively reduce the carrier phase offset and bit error rate, and improve the performance of the wireless communication system.