Amplitude and Phase Error Correction Method for Microwave Correlation Imaging Radar Based on Auxiliary Array Elements

Abstract

The invention provides a microwave associated imaging radar amplitude-phase error correction method based on auxiliary array elements so as to estimate a microwave associated imaging radar amplitude-phase error and then obtain a relatively ideal time and space radiation field by compensation on the amplitude-phase error. The method comprises the steps that step 1: a microwave associated imaging radar transmitting antenna array transmits multiple types of waveforms, corresponding multiple types echo data are received by a receiving antenna array, matched filtering is performed on the echo data, and the obtained echo data matrixes are orderly arranged; step 2: the elements in the echo data matrixes are grouped; step 3: a data covariance matrix is estimated; step 4: target angle estimation is performed so that a target direction vector is obtained; step 5: the amplitude error and the phase error of the transmitting antenna array are estimated respectively so that corresponding error estimation values are obtained; and step 6: the amplitude and the phase of the transmitting antenna array are respectively corrected according to the amplitude error estimation value and the phase error estimation value of the transmitting antenna array.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to a method for correcting amplitude and phase errors of microwave correlated imaging radars based on auxiliary array elements, which is applied to real-time on-line correction of amplitude and phase errors of correlated imaging radar arrays. Background technique [0002] Radar is an indispensable electronic equipment in modern life. Among them, the microwave correlation imaging radar system can realize staring imaging of the scene, and has broad application prospects in national defense, anti-terrorism, security and other scenes. Because microwave correlation imaging radar needs to transmit different signals in different transmitting elements, it is easier to introduce larger amplitude and phase errors than traditional array radars, and the amplitude and phase errors will continue to change with time, temperature and other environmental factors. When there is an amplitude and phase e...

AI Technical Summary

Problems solved by technology

In many practical application scenarios, since the amplitude and phase error of the radar array will change with time, temperature and other environmental factors, it is necessary to correct the amplitude and phase error online, and there are great limitations in using the correction source for correction.

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