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

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.