Research on eclipse problem of quasi-CW phase-coded radar and solutions

The eclipse problem of quasi-CW phase-coded radar was analyzed, and solving methods were proposed by waveform and code designs. As for waveform design, a method based on in-pulse combination of long code with short code was put forward, which can solve the severe eclipse problem of short range target, and simultaneously detect the whole range. As for code design, a range sidelobe suppression method based on interpulse code agility was proposed. Theoretical analysis and simulated results show that, the code agility method can work well even when the target echo is eclipsed, so meet the demand of low pulse repetition frequency long code quasi-CW radar.