引言问题的陈述本文论述检测接近地面的目标,如低飞的飞机、导弹等的问题。从机载平台上向地面进行观察变得越来越有吸引力。这样做的主要优点在于避免了地形的遮蔽和其它的传播影响,雷达的机动性和可以使用小的无人驾驶侦察平台。然而,装在飞机上的雷达要面临着严重的杂波问题。与地基雷达不同的是,它必须考虑到杂波能量较大和存在着与方位有关的多卜勒频移这一事实。固定雷达所接收到的固定散射体回波是窄带的。机载雷达由于平台运动造成地面杂波频带的展宽,以致常规的动目标显示技术,如通常使用的杂波对消器,抑制杂波的 INTRODUCTION STATEMENT OF QUESTIONS This article addresses the issues of detecting targets that are close to the ground, such as low-flying aircraft and missiles. Observing the ground from the airborne platform becomes more and more attractive. The main advantage of doing so is the avoidance of terrain masking and other spread effects, radar maneuverability and the possibility of using small unmanned reconnaissance platforms. However, the radar mounted on the aircraft faces a serious clutter problem. Unlike ground-based radars, it must take into account the fact that the clutter energy is large and there is a Doppler shift associated with the bearing. Fixed-scatter echoes received by fixed radars are narrow-band. Airborne radar broadens the ground clutter band due to the movement of the platform, so that conventional moving target display technologies, such as commonly used clutter canceller, clutter suppression