雷达信号处理中,窄脉冲剔除技术将回波中超出幅度门限且宽度明显小于发射脉宽的信号剔除,实现对非完整密集转发干扰的抑制。然而,该方法破坏原始目标回波的完整性,形成切片脉冲。经与发射信号匹配接收后,在目标周围形成栅瓣,造成大量检测虚警。针对该问题,提出一种栅瓣抑制方法:通过重构目标的参考切片脉冲,估计栅瓣位置和相对强度;然后,对栅瓣衰减,实现栅瓣抑制。仿真实验显示,该方法可有效检测目标,减少虚警。

In radar signal processing, short-pulse eliminating method eliminates echo of which the amplitude is significantly high and the width is smaller than the transmitted pulse-width. In this way, it suppresses the incomplete dense repeater jamming. However, this method destroys the integrity of a target's echo, resulting in slicing pulses. After matched filtering, grating lobes and false alarms appear. To solve this problem, this paper presents a grating lobe suppression method. By reconstruct referred slicing pulses of the target, the position and relative strength of grating lobes can be estimated. Then, grating lobes are attenuated. Simulated experiments show that this method can effectively detect targets and reduce false alarms.

TN957