Joint DOD and DOA estimation for high speed target using bistatic MIMO radar

Abstract

In bistaticmultiple-inputmultiple-output (MIMO) radar, range migration and invalidly synthesized virtual array resulting fromthe seriousmismatch ofmatched filtermake it difficult to estimate direction of departure (DOD) and direction of arrival (DOA) of high speed target using the traditional superresolution algorithms. In this study, a method for joint DOD and DOA estimation of high speed target using bistaticMIMOradar is proposed.Aftermultiplying the received signals with the conjugate of the delayed versions of the transmitted signals, Fourier transform(FT) of themultiplied signals over both fast time and slow time is employed. Then, the target components of radar return corresponding to the different transmitted waveforms can be perfectly separated at the receivers by extracting the target frequency-domain data along slow-time frequency dimension when the delay between the transmitted signals and their subsequent returns is timed. By splicing the separated target components distributed along several range cells, the virtual array can be formed, and then DOD and DOA of high speed target can be estimated using the superresolution algorithm with the range migration and the mismatch of matched filter properly removed. Simulation results have proved the validity of the proposed algorithm. Copyright © 2014 Authors.