An ultra-low sidelobe suppression method about NLFM

Abstract

Pulse compression technology is very useful in modern radar system, with the reason that it can solve the contradiction between the radar range and range resolution. Now, nonlinear frequency modulation (NLFM) is researched widely, because the pulse compression of the NLFM signal can lower the range sidelobe better than –40 dB without window weighting. But in some applications, the reducing level also cannot meet the requirements. This paper put forward a continuous nonlinear FM waveform designed bring down the level of the range sidelobe, which can suppress the range sidelobe to –86 dB. Therefore, it can be used in many radar systems, especially in some kind of weather radar.