A Radar Elevation Calibration Method Based on Target Echo Signal

Abstract

The invention belongs to the technical field of radar erection height calibration and discloses a radar erection height calibration method based on target echo signals. The method comprises the steps: 1, radar receives the target echo signals of the initial moment; 2, a parameter k is set to be equal to 1; a first estimation value of the radar erection height is obtained; 3, the working frequency, of the next moment, of the radar is obtained according to a function relation of an estimated mean square error MSE k of the radar erection height and a frequency variable f; 4, the radar transmits the signals to a target according to the working frequency of the next moment and receives the corresponding target echo signals, k is set to be equal to k+1, then the RML algorithm is adopted for carrying out kth time estimation on the radar erection height according to the corresponding target echo signals, and the kth estimation value of the radar erection value is obtained; 5, the steps from three to four are executed in a looping mode until target tracking is finished. Compared with a similar method, the calibration method improves the calibration precision of the radar erection height.

Description

technical field [0001] The invention belongs to the technical field of radar height calibration, and relates to a radar height calibration method based on target echo signals, in particular to a radar height calibration method for low-angle tracking. Background technique [0002] With the increasing tactical performance of modern weapons, the requirements for radar low-angle tracking measurement accuracy are also getting higher and higher. When tracking at low elevation angles, the measurement accuracy of the target elevation angle is not only affected by the refraction effect caused by the uneven atmosphere, and the multipath effect caused by the specular reflection and diffuse reflection on the ground or sea surface, but also by the radar elevation error. Therefore, the calibration of the radar height is very necessary. The most direct radar elevation calibration method is field measurement, but in the face of complex time-varying position environment and frequent positio...

AI Technical Summary

Problems solved by technology

However, there is a shortcoming in these methods, which ignores the relationship between the parameter estimation accuracy and the radar operating frequency

Since the mean square error of radar height estimation in low-angle tracking tends to fluctuate with the increase of operating frequency, this affects the calibration accuracy of radar height

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