Application of the rearrangement algorithm in the time-frequency analysis of non-cooperative frequency hopping signals

Getting a good time-frequency distribution of frequency hopping (FH) signals is crucial for detecting and tracing the FH signals. In this paper, the theory of the rearrangement of time-frequency distribution is first summarized. Then, the basic principles of detecting the signals using the algorithm of rearrangement of the smooth pseudo Wigner-Ville distribution (RSPWVD) and the algorithm of rearrangement of the Morlet scale chart (RMSC) are analyzed in detail, with their algorithm expressions being given at the same time. The analysis results show that the RMSC algorithm not only has more ideal anti-jamming effects, but can also enhance the time-frequency aggregation of the signal. Thus, the signal parameters are estimated more accurately using the RMSC algorithm. At the end, the computer simulation is shown to test the feasibility and effectiveness of the algorithm.