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Method for self-correction of array error of multi-input multi-output radar system

A radar system and array error technology, applied in the radar field, can solve problems such as amplitude and phase errors, MIMO radar system array azimuth dependence, etc.

Active Publication Date: 2011-02-09
XIAN CETC XIDIAN UNIV RADAR TECH COLLABORATIVE INNOVATION INST CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to: in order to solve the problem of azimuth-dependent amplitude and phase errors in MIMO radar system arrays, a method for self-correction of multi-input multi-output radar system array errors is provided, which can correct the array azimuth-dependent amplitude and phase errors effective self-calibration

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  • Method for self-correction of array error of multi-input multi-output radar system

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Embodiment Construction

[0029] refer to figure 1 , it is the realization flowchart of the present invention, can find out from the figure that the specific implementation steps of the present invention are as follows:

[0030] (1) Firstly, the two calibrated transmitting elements of the MIMO radar system are used to simultaneously transmit mutually orthogonal coded signals, and then the receiving array is used to receive the target echo signal, and the received echo signal is:

[0031] X = Σ i = 1 P Γ ( θ i ) a r ( θ i ) β i a t T ( θ i ) s ...

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Abstract

The invention discloses a self-correction method of a multi-input multi-output radar system array error, relating to the radar technical field. The method aims to carry out self correction of the reliant amplitude and phase error of a receiving array azimuth on the premise that the transmitting array of a multi-input multi-output radar system. The implementation process of the method is as follows: firstly, by means of the two corrected transmitting array elements of the multi-input multi-output radar system, orthogonal signals are transmitted; then, the echo signals of the transmitting arrayelements are separated by means of the orthogonality of transmitting signal through adopting a matched filtering method; an auto correlation matrix and a cross correlation matrix are established by means of the echo signals; a real guide vector and a target angle of an array are estimated by means of a rotary invariant subspace method; finally, by means of the real guide vector and the target angle of the array obtained through estimation, the array azimuth reliant amplitude and phase error can be corrected. The self-correction method can be used in the array error correction field of a multichannel radar system.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to the application of a multi-input multi-output radar system, in particular to a method for self-correction of an array error of a multi-input multi-output radar system. This method can be used in the field of array error correction for multi-channel radar systems. Background technique [0002] In recent years, research on multiple-input multiple-output radar, namely MIMO radar, has aroused widespread interest in the academic community. Compared with traditional phased array radar, MIMO radar has many advantages. For example, it has larger virtual aperture, narrower beam and lower side lobe, faster search rate, etc. At the same time, many existing adaptive techniques can be applied to MIMO radar systems. But for many high-resolution techniques, such as multiple signal classification algorithm, rotation-invariant subspace algorithm, etc., when there are errors in the array, the pe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40G01S13/02
Inventor 廖桂生李军金明陶海红曾操徐青
Owner XIAN CETC XIDIAN UNIV RADAR TECH COLLABORATIVE INNOVATION INST CO LTD
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