Research on recognition algorithm for intra pulse modulation of radar signals

摘要

In view of the recognition of linear frequency modulation (LFM) signal and phase coded (PSK) signal, we proposed a radar Signal modulation recognition algorithm based on the combination of fractional Fourier transform (FRFT) and multiple phase differences. Through the nesting of two recognition algorithms, we have achieved the recognition of the signal from coarse to fine. FRFT is used to distinguish LFM signals from other coded signals, and multiple phase differences are used to identify regular signals and all kinds of coded signals. Simulation analysis verified that the algorithm is effective.