Pulse radar randomly interrupted transmitting and receiving optimization based on genetic algorithm in radio frequency simulation

Xiaobin Liu,Qihua Wu,Feng Zhao,Xiaofeng Ai

doi:10.1186/s13634-021-00718-6

Abstract

The interrupted transmitting and receiving (ITR) can be used in anechoic chamber to solve the coupling between the transmitted and reflected signals. When the ITR periods are random, the fake peaks in high-resolution range profile (HRRP) of ITR echo can be reduced. Then, by utilizing the piecewise sparse property of ITR echo, the HRRP is reconstructed based on compressive sensing (CS). However, the periods of ITR determine the restricted isometry property (RIP) condition and the HRRP reconstruction performance. In order to improve the HRRP reconstruction performance, the ITR period sequence optimization method based on a genetic algorithm (GA) is proposed in this paper. The correlation coefficient of the sensing matrix columns is minimized after optimization so that the RIP of the sensing matrix can be well satisfied. Simulation and comparison results illustrate that the optimization method converges fast and the HRRP reconstruction performance is improved with the optimized ITR periods.

Highlights

The radio frequency simulation (RFS) [1] in an anechoic chamber is widely adopted to conduct target measurement [2, 3]
The R-interrupted transmitting and receiving (ITR) period sequences are set as 0.5~0.8 μs, 0.5~1.2 μs, and 0.8~1.1 μs with an interval of 0.1 μs
4 Conclusion The Randomly interrupted transmitting and receiving (R-ITR) period sequence optimization method is proposed in this paper based on genetic algorithm (GA)

Summary

Introduction

The radio frequency simulation (RFS) [1] in an anechoic chamber is widely adopted to conduct target measurement [2, 3]. Because the size of an anechoic chamber is small, the round-trip time of electromagnetic wave may be sub-microsecond which is generally larger than the pulse width. The reflected and transmitted signals may be coupled at the receiver when the pulse radar signal is applied in an anechoic chamber for target measurement. In order to solve the problem, the interrupted transmitting and receiving (ITR) method is proposed in [3]. The ITR can divide the pulse signal into hundreds of short pulses with each short pulse width being submicrosecond. As each short pulse width is smaller than the round-trip time, the coupling is eliminated and the target echo can be obtained for the target measurement

Methods

Results

Conclusion