猝发通信载波恢复算法仿真分析  

Simulation and Analysis of the Carrier Recovery Method in Burst Communication System

作　　者：韩明钥[1] 张金贵[1] HAN Mingyue;ZHANG Jingui(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,石家庄050081

出　　处：《移动信息》2024年第10期16-18,43,共4页Mobile Information

摘　　要：针对猝发通信系统信号持续时间短的特点,为解决猝发载波快速捕获难、算法复杂度高的问题,文中研究了短猝发抗大频偏相干载波恢复工程化方法。首先采用基于参数迭代优化的频率估计算法进行载波初始恢复,其次利用基于区间累积的相位估计算法实现相位精准捕获,实现相干载波快速同步,最后采用MATLAB仿真软件进行猝发通信载波恢复算法性能验证分析。结果表明,在E_(S)/N_(0)=0 dB条件下,使用64个符号,归一化频率偏差估计范围达±40%;在E_(S)/N_(0)=1 dB条件下,使用32个符号,归一化载波频偏估计方差优于10^(-5);在E_(S)/N_(0)=2 dB条件下,使用约200个符号,可以实现锁相环快速锁定。该算法及仿真数据可用于猝发通信系统工程设计,以降低系统开销,提高快速捕获能力。Aiming at the characteristics of short duration of burst communication system,in order to solve the problems of fast acquisition of burst carriers and high algorithm complexity,this paper studies the engineering method of short burst coherent carrier recovery against large frequency offset.Firstly,the frequency estimation algorithm based on parameter iterative optimization is used for initial carrier recovery,and secondly,the phase estimation algorithm based on interval accumulation is used to achieve accurate phase acquisition,and the coherent carrier synchronization.MATLAB simulation software is used to verify the performance of the burst communication carrier recovery algorithm.The results show that under the condition of ES/N0=0 dB,using 64 symbols,the estimated range of normalized frequency offset is±40%;under the condition of ES/N0=1 dB,using 32 symbols,the estimated variance of normalized carrier frequency offset is better than 10^(-5);under the condition of ES/N0=2 dB,using about 200 symbols,the phase-locked loop can be quickly locked.The algorithm and simulation data can be used in the engineering design of burst communication systems to reduce system overhead and improve fast acquisition capability.

关 键 词：猝发通信 载波恢复 频率估计 相位估计 相干解调 

分 类 号：TN927.2[电子电信—通信与信息系统]