端射阵机载雷达距离模糊非平稳杂波补偿方法

端射阵天线是指波束指向垂直于阵列法线方向的一类特殊雷达天线，由于其具有低剖面和定向辐射特性，因而特别适合用于机载雷达的补盲.由于端射阵通常呈前视放置，因而与传统前视侧射阵机载雷达一样，不可避免地要面临杂波的距离非平稳问题.本文基于端射阵机载雷达杂波谱特性，提出了一种距离模糊下端射阵近程杂波补偿新方法.该方法以最远可检测距离单元为参考单元并增加了动目标约束保护条件，克服了存在距离模糊时基于杂波谱配准（Registration-Based Compensation，RBC）原理的传统补偿方法存在的目标相消以及计算量大的问题；同时针对可能存在的目标约束失配问题，进一步提出了基于虚拟波束的扩展补偿方法.计算机仿真结果验证了本文方法的有效性.

A Non-stationary Clutter Spectrum Compensation Method for End-Fire Array Airborne Radar with Range Ambiguity

End-fire array antenna is a kind of special radar antenna with beam pointing perpendicular to the normal direction of the array.Because of its low profile and directional radiation characteristics,it is especially suitable for blind compensation of airborne radar.As end-fire array is usually placed forward-looking,it inevitably faces the problem of non-stationary clutter which just likes traditional forward-look side-fire array.Based on the clutter spectrum characteristics of end-fire array airborne radar,a novel short-range non-stationary clutter compensation method for end-fire array with range ambiguity is proposed in this paper.The farthest detectable range unit is taken as the reference unit and the constraint protection condition is added to the moving target in this method,which overcomes the disadvantage of target cancellation and large computation of the traditional compensation method based on RBC(Registration-Based Compensation) principle with range ambiguity.At the same time,aiming at the problem of the target constraint mismatch,an extended compensation method based on virtual beam is proposed.The computer simulation results verify the effectiveness of the proposed method.