机载雷达优化多普勒和差通道杂波抑制方法

Method of Clutter Suppression With Optimal Doppler Sum and Difference Channel for Airborne Radar

为了解决单通道机载雷达的杂波抑制问题,提出了一种基于优化多普勒差通道的和差多普勒通道联合自适应杂波抑制的方法.该方法采用粒子群优化（PSO）算法,以信杂噪比（SCNR）损失最小为目标构造优化多普勒差通道,通过优化后的多普勒差通道与和通道联合自适应处理实现对杂波的有效抑制.仿真结果表明,采用本文方法后单通道机载雷达在不附加任何其他设备的情况下,杂波抑制性能在主瓣区域可以提高5~12 dB,具有较大的实用价值.

To solve the clutter suppression for single channel airborne radar, a method of joint adaptive clutter suppression using sum and difference Doppler channel based on the optimal Doppler difference channel is proposed in this paper. In this scheme, the particle swarm optimization （PSO） algorithm is used, the optimal Doppler difference channel is constructed, aiming at the minimum loss of SCNR, and the effective suppression of clutter is realized by adaptive processing of the joint optimized Doppler difference and sum channels. Simulation results show that the clutter suppression performance can be improved by 5 - 12 dB in the region of main lobes, for cases where the single channel airborne radar is without any additional equipment, after the proposed method being used, which is of greater availability.