调频步进频雷达的测速方法性能分析

在高速弱小目标环境下，目标机动性强，调频步进频雷达的测速算法需要具有较好的抗机动和抗噪性能。详细分析了耦合时移测速和帧内相关测速在目标机动情况下的测速性能，理论分析和仿真结果表明加速度对帧内相关测速影响较大。在此基础上进一步提出了基于二次相位影响的速度搜索算法，并分析了各种算法在低信噪比下的速测性能。仿真实验结果表明所提的测速方法具有较高的抗噪性能。所提方法具有较大的测速范围和较好的测速精度，且实时性强，易于工程应用。

Performance analysis of radial velocity measurements for a modulated stepped-frequency radar

In the weak target with high speed environment, the target is often maneuverable, so good anti maneuvering and good anti noise performances are needed for the algorithm of velocity estimation in the modulated stepped frequency radar. The velocity measure performance of range Doppler coupling and cross correlation inner frame are analyzed in detail. Both theory analysis and simulation results show that the acceleration impacts greatly on the cross correlation inner frame velocity estimation but little on the rang Doppler coupling velocity measure. The speed search algorithm based on the quadratic phase influence is presented furthermore. The anti noise performance of each algorithm is analyzed and simulated. The simulation results indicate they can work well in the low SNR. The algorithm can receive large velocity measure scope and high precise estimation, and also it is well real time and easy to the project application.