MSK系统中迭代相位同步补偿方法  

Iterative phase synchronization compensation algorithm of MSK system

作　　者：李炜[1] 赵旦峰[1] 钱晋希 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《哈尔滨商业大学学报（自然科学版）》2011年第4期602-604,608,共4页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：国防预研项目(4010607010102)

摘　　要：针对高斯信道中基带信号相位偏移的同步问题,将具有极好香农限的LDPC码和迭代调制算法引入相位同步系统中,提出了一种迭代相位同步补偿方法.其核心思想是在m序列作为同步码字的基础上,采用不同的交织和译码算法,在接收端通过预先给定的同步参考门限,进行反馈相位补偿,并且可以针对不同的信道情况,进行加权和解调数据调整,以满足不同的性能要求.理论分析和仿真结果表明,在不同的迭代次数、信源帧长和交织深度的情况下,该方法能够精确地补偿高斯信道带来的相位偏移,达到比较理想的相位同步.For the phase shift of the synchronous problem of baseband signal in Gaussian channel,the LDPC code with excellent Shannon limit and iterative Modulation Algorithm were introduced into the phase synchronization system.A compensation method of iterative phase synchronization was proposed,whose core idea was based on the m sequence as a synchronization code word,with different interleaving and decoding algorithm,through the pre-specified synchronization reference threshold to compensate the feedback phase at the receiver,and for different channel conditions,the data could be demodulated and weighted to adjust to meet different performance requirements.Theoretical analysis and simulation results showed that： for different iterations,frame size and interleave depth,the algorithm could compensate the phase shift in Gaussian channel and could achieve ideal phase synchronization.

关 键 词：迭代 同步门限 相位估计 相移同步补偿 

分 类 号：TN911.22[电子电信—通信与信息系统]