Weak target detection based on the fractional ambiguity function

摘要

Based on the analysis of the time shift characteristic of the fractional ambiguity function and the characteristic of the monochromatic signal, linear frequency modulation (LFM) signal and signal which phase has a thrice-order term, a new method based on the difference of the fractional ambiguity function module of the time-delay signal for moving a weak target in sea clutter is proposed. An experiment using the IPIX data shows the validity of the method.