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A Radar Elevation Calibration Method Based on Target Echo Signal

A target echo and calibration method technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as the influence of radar rack height calibration accuracy, ignoring the radar operating frequency of parameter estimation accuracy, and fluctuations in mean square error

Active Publication Date: 2016-01-06
XIDIAN UNIV
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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

Method used

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  • A Radar Elevation Calibration Method Based on Target Echo Signal
  • A Radar Elevation Calibration Method Based on Target Echo Signal
  • A Radar Elevation Calibration Method Based on Target Echo Signal

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing:

[0019] refer to figure 1 , is a schematic flow chart of a radar elevation calibration method based on target echo signals in the present invention. The radar height calibration method based on the target echo signal specifically includes the following steps:

[0020] S1: The radar transmits a signal to the target at the initial moment, and receives the target echo signal at the initial moment; the specific description is as follows:

[0021] The radar is equipped with a vertically placed uniform linear array antenna, the number of elements of the uniform linear array antenna is N, and the distance between adjacent array elements is d; the radar transmits signals to the target according to the set initial operating frequency at the initial moment, and Receive the target echo signal at the initial moment. refer to figure 2 , is a schematic diagram of the multipath geomet...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 赵永波朱玉堂刘宏伟水鹏朗程增飞何学辉
Owner XIDIAN UNIV
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