Inter-pulse initial phase third-power modulation and FRFT (fractional Fourier transform)-based DRFM (digital radio frequency memory) interference detection and resisting method

The invention discloses an inter-pulse initial phase third-power modulation and FRFT (fractional Fourier transform)-based DRFM (digital radio frequency memory) interference detection and resisting method. According to the method, a multi-channel matched filter and MTD (moving target detection) are utilized to detect whether interference exists, and if interference exists, the priori information of the interference and a target are utilized to design the initial phase of the transmission pulses of a radar, the transmission pulses of the radar are transmitted; matched filtering processing of corresponding channels is carried out on echoes; and FRFT (fractional Fourier transform) is utilized to suppress the interference. With the method of the invention adopted, the detection of the target can be realized under a low signal-to-interference ratio; the signal-to-interference ratio can be improved greatly under the premise that a signal-to-noise ratio is not affected, so that the subsequent processing of signals can be facilitated; and with the decrease of the signal-to-interference ratio, the interference suppression performance of the method is stable.