Radar Broadband Signal High-precision On-line Testing Method

The amplitude and phase stability, and delay characteristics between channels affect overall performance of digital phased array radar array. Aimed at the shortcoming of usual broadband signal processing method test precision, two methods are introduced and compared, including time domain interpolation of matched filtering and frequency domain interpolation of dechirping processing. This paper set up broadband signal on-line testing system. Test module extracts the channels amplitude and time-delay after processing. After verification and comparison, frequency domain interpolation of dechirping processing is proved to promote broadband signal performance testing accuracy of digital phased array radar.