Correction method for amplitude and phase errors of bistatic mimo radar transceiver array

Abstract

The invention belongs to the technical field of radar transceiver array amplitude phase error correction and discloses a bistatic MIMO radar transceiver array amplitude phase error correction method. The bistatic MIMO radar transceiver array amplitude phase error correction method comprises the following steps that all pulse periodical signals in back wave signals received by a bistatic MIMO radar are Y1...YQ, the transmitted waveform is expressed as S, transmitted waveform matching and column vectorization processing are conducted on the Yi...YQ respectively, eta1... etaQ are obtained, and a matrix X is formed by the eta1...etaQ; according to the four built selection matrixes J1...J4, X1...X4 are obtained; the wave reach direction and the wave departure direction of a target, and the steering vector of a transceiver array of the bistatic MIMO radar are estimated through the rotary subspace invariant algorithm; an amplitude phase error of the transceiver array of the bistatic MIMO radar is obtained.

Description

technical field [0001] The invention belongs to the technical field of correction of amplitude and phase errors of radar transceiver arrays, in particular to a method for correcting amplitude and phase errors of bistatic MIMO radar transceiver arrays, which can more accurately realize the estimation of angle of arrival and angle of departure. Background technique [0002] Multiple input multiple output (MIMO) radar is a new radar system proposed in recent years. It transmits mutually orthogonal signals through the transmitting array elements, and the receiver uses the orthogonality of the transmitting signals to combine the signals from different transmitting array elements. Separated, and then use these signals for parameter estimation. Compared with traditional radar, MIMO radar can increase the maximum number of detectable targets, improve target resolution performance, and has the advantages of larger virtual aperture, narrower beam and lower side lobes. In terms of sig...

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Problems solved by technology

[0003] Many people have devoted themselves to the DOA estimation research of bistatic MIMO radar, but they have not considered the amplitude and phase errors of the transceiver array, and in practical applications, the amplitude and phase errors of the array are unavoidable

In the prior art, some scholars have obtained the closed-form solution of the transceiver array by combining the ESPRIT method and the least square method, which avoids the peak search, but the accuracy and performance of the angle estimation and amplitude-phase error estimation still need to be improved

It was also proposed to use the MUSIC method to perform two one-dimensional searches to obtain better estimation performance, but the calculation of two one-dimensional peak searches is too large and the complexity is high

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