基于测速误差的雷达间电磁干扰判决方法

Judgment Method of Electromagnetic Interference among Radars Based on Velocity Measurement Error

为了更好地判定雷达间电磁干扰对雷达性能的影响程度,分析了传统干扰余量判决方法的不足,在雷达受到干扰的情况下建立了雷达测速误差的计算模型,并以3种典型雷达信号为例推导了测速误差与信干比的定量关系。仿真实验结果表明:随着信干比的不断增大3种信号的测速误差逐渐降低,当信干比由0dB增加到20dB时,矩形脉冲信号和线性调频信号的测速误差减小了13m/s,sincx信号的测速误差减小了16m/s。这种基于测速误差的判决方法能够客观、定量地反映出雷达间的干扰情况。

In order to judge the influence degree of electromagnetic interference among radars on radar performance better,this paper analyzes the disadvantage of traditional judgment method of interference measurement residual,establishes the calculation model of radar velocity measurement error in the circumstance that the radar is jammed,and deduces the quantitative relationship between the velocity measurement error and signal to interference ratio（SIR） taking three typical radar signals as an example.The simulation test results indicate：the velocity measurement errors gradually fall along with the SIR increases,when the SIR increases from 0 dB to 20 dB,the velocity measurement error of rectangle pulse signal and linear frequency modulation signal decreases 13 m/ s,and the velocity measurement error of sincx signal decreases 16 m/s.This judgment method based on velocity measurement error can illuminate the interference condition among radars objectively and quantificationally.