论文部分内容阅读
在穿墙生命探测中,由于墙的双程穿透衰减,墙后的人体目标雷达回波非常微弱,比天线耦合和墙的一次反射回波小得多,必须对其进行杂波抑制才能从中检测出目标特征。在冲激体制下,针对墙后微动目标在多个周期回波中位置的微小变化,以及由此产生的微多普勒频率与固定杂波多普勒频率的不同,提出了一种基于慢时间频域的杂波抑制方法。这种杂波抑制滤波器比常规MTI滤波器的幅频响应具有更窄的过渡带,因而在抑制固定杂波的同时,保留了目标的多普勒频率信息。实测数据的处理结果表明,这种方法可以有效抑制固定杂波,从而检测到墙后的微动人体目标。
In the wall penetration detection, the human target radar echo behind the wall is very weak due to the attenuation of the double pass of the wall. Compared with the antenna coupling and the once-reflected echo of the wall, the clutter must be suppressed Detected target characteristics. Under the impulse system, aiming at the small change of the position of the fretting target behind the wall in multiple periodic echoes and the difference between the Doppler frequency and the fixed clutter Doppler frequency, Time-frequency clutter suppression method. The clutter suppression filter has a narrower transition band than that of the conventional MTI filter, so the target Doppler frequency information is retained while suppressing the clutter. The measured data processing results show that this method can effectively inhibit the fixed clutter, which detects the micro-body behind the goal of the wall.