基于形态滤波功率谱分析的短波信号检测技术  

Short-Wave Signal Detection Technology based on Morphological Filtering Power Spectrum Analysis

作　　者：吉磊[1] 樊小琴[1] JI Lei;FAN Xiao-qin(No.30 Institute of CETC,Chengdu Sichuan 610041,China)

机构地区：[1]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》2018年第7期1561-1565,共5页Communications Technology

摘　　要：在短波信号侦察中,从复杂电磁环境中检测是否有目标信号的存在是需要解决的首要问题。由于噪声干扰频谱呈非线性变化,降低了对目标信号的检测概率。因此,信号检测直接关系到进一步对信号各参数进行估计和恢复出原始信号。采用一种基于形态滤波功率谱分析检测方法,通过对无线信号的功率谱进行估计和形态学滤波处理,获取噪底平滑的功率谱,实现了在复杂电磁环境下的短波信号检测。该技术在外场环境验证试验中可有效平滑噪底变化,提高对目标信号的截获概率。In the detection of short-wave signals,to detect the presence of a target signal from a complex electromagnetic environment is a primary problem that needs to be solved.Since the noise interference spectrum changes nonlinearly,the probability of detecting the target signal is reduced.Therefore,signal detection is directly related to further estimation of each parameter for the signal and restoration of the original signal.A detection method based on morphological filtering power spectrum analysis is adopted.By estimating the power spectrum of wireless signal and implementing the morphological filtering,the power spectrum with smooth noise floor is acquired,and the short-wave signal detection in complex electromagnetic environment realized.This technology can effectively smooth the noise floor change in the field environment verification test and improve the probability of intercepting the target signal.

关 键 词：HF信号检测 形态滤波 复杂电磁环境 功率谱 

分 类 号：TN92[电子电信—通信与信息系统]