其他摘要：Frequency hopping signals in their own excellent anti-interception, anti-interference ability, in the military communication has been widely applied, therefore, it has a very important practical significance for the research of interceptting the frequency hopping signals. In this paper, the joint time-frequency analysis, in-depth study of the frequency hopping signal line automatic detection and frequency blind search acquisition issues, and its feature extraction algorithm is studied. Frequency hopping signals for feature extraction of a feature based on wavelet ridge extraction algorithm, the matlab simulation results the performance of the method was validated by experimental results show that the characteristics of wavelet ridge extraction algorithm is very performance advantages, and further improve the frequency estimation accuracy and timeliness.
