Aiming at the problem of high range sidelobe of random stepped frequency signal in MIMO ground pene-trating radar,a sidelobe suppression method based on fast second-order cone optimization problem is proposed in this paper.The echo signal is firstly preprocessed by establishing a random stepped frequency signal model.Then,based on the sidelobe characteristics of the echo signal,the sidelobe suppression problem is transformed into a second-order cone optimization problem that the objective function is established by the peak sidelobe of the signal,and the joint con-straints are resulted from the main peak loss,the peak sidelobe and the integral sidelobe.Finally,the interior point meth-od is used to solve the optimization problem to obtain the optimal sidelope filter coefficients.The simulation and mea-sured data processing results show that the designed mismatch filter can effectively reduce the peak sidelobe level and integral sidelobe level and improve the main sidelobe ratio of the signal under the condition of low main peak loss.This method provides an effective solution to the range sidelobe problem in MIMO ground penetrating radar,and is expected to improve the performance of ground penetrating radar in engineering applications.
MIMO ground penetrating radarrandom stepped frequency signalrange sidelobe suppressionse-cond-order cone programming
国家科技期刊平台
NSTL
万方数据
