Parameterized time-frequency analysis to separate multi-radar signals

: Multi-radar signal separation is a critical process in modern reconnaissance systems. However, the complicated battle fi eld is typically confronted with increasing electronic equipment and complex radar waveforms. The intercepted signal is dif fi cult to separate with conventional parameters because of severe overlap-ping in both time and frequency domains. On the contrary, time-frequency analysis maps the 1D signal into a 2D time-frequency plane, which provides a better insight into the signal than tra-ditional methods. Particularly, the parameterized time-frequency analysis (PTFA) shows great potential in processing such nonstationary signals. Five procedures for the PTFA are proposed to separate the overlapped multi-radar signal, including initiation, instantaneous frequency estimation with PTFA, signal demodulation, signal separation with adaptive fi lter and signal recovery. The proposed method is veri fi ed with both simulated and real signals, which shows good performance in the application on multi-radar signal separation.

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