一种复杂环境中跳频信号检测和参数估计改进方法  

Modified Method for FH Signal Detection and Parameter Estimation in Complex Environment

作　　者：颜雨 闫晓峰 吴治霖[2] YAN YU;YAN Xiao-feng;WU Zhi-lin(Department of Naval Equipment,Chengdu Sichuan 610036,China;No.30 Institute of CETC,Chengdu Sichuan 610041,China)

机构地区：[1]海军装备部,四川成都610036 [2]中国电子科技集团公司第三十研究所,四川成都610041

出　　处：《通信技术》2020年第3期572-577,共6页Communications Technology

摘　　要：信号检测与参数估计可为后续的信号解调分析提供依据,在电子对抗中起到重要的作用。针对复杂环境中跳频信号的盲处理问题,针对跳频信号模型进行分析,提出了一种基于滑动相关与小波变换结合的改进方法,更好地完成了检测与参数估计。该方法可较好地克服瑞利信道衰落和传播损耗的影响,检测性能良好,且跳频参数估计精度较高。最后,通过计算机仿真验证了改进方法结果的有效性,且正确率高,具有工程实用性,性能也优于过去的一些算法。Signal detection and parameter estimation can provide a basis for subsequent signal demodulation analysis and play an important role in electronic countermeasures.Aiming at the blind processing of frequency-hopping signals in complex environments,and according to analysis of the frequency-hopping signal model,a modified method based on a combination of sliding correlation and wavelet transform is proposed so as to fairly complete detection and parameter estimation.This method can better overcome the effects of Rayleigh channel fading and propagation loss,has good detection performance and high accuracy of frequency-hopping parameter estimation.Finally,computer simulation verifies the effectiveness of the modified method,and indicates that this method has high accuracy,engineering practicability,and better performance than some previous algorithms.

关 键 词：跳频信号 检测 参数估计 小波变换 

分 类 号：TN918.91[电子电信—通信与信息系统]