A novel method to identify multi-target by transformable periods LFM waveform

A novel method to identify multi-targets for automotive collision avoidance radar (ACAR) by using transformable periods and symmetrical linear frequency modulation (TPS-LFM) waveform is proposed. In addition, a method to generate the signal source based on a triple tuned frequency synthesizer (TTFS) is discussed. Theoretical derivation shows that the false detections of unnecessary targets and failures to detect necessary targets, which used to be major problems in detection performance, have been substantially reduced, and the high resolution of range and velocity for the target may be obtained simultaneously. Its usefulness in eliminating the false targets is confirmed.