Abstract: Developments of signal analysis and wavelet thensform from the viewpoint of time-frequency analysis are surveyed, and the superiorities of wavelet transform as applied to signal processing are inquiered into and the potential applications of wavelet transform to radar radar signal processing are focused on especially on its application to wideband or ultla-wideband radars. Further, radar ambiguity function analysis,signal detection and parameter estimation, and recognition of radar targers using wavelet transform are discussed. Finally, the prospects of applications of wavelet transform to signal processing are looked into.