A measurement method for improving the accuracy of target angle detection by a pulse system measurement system
A measurement system and target angle technology, which is applied in the measurement field of pulse system measurement system to improve target angle detection accuracy, can solve problems such as reducing target measurement accuracy, look-up table calculation error, etc., and achieve the effect of avoiding temperature drift and performance change
Active Publication Date: 2020-05-15
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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However, analog circuits usually cannot avoid temperature drift and performance changes. Gain changes and phase drifts will cause changes in the consistency of the sum and difference beam branches, which in turn will cause errors in the look-up table calculation of the target deviation from the center electric axis angle obtained by the above-mentioned look-up table method. Reduced target measurement accuracy
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[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0028] The invention provides a measurement method for improving the accuracy of target angle detection by a pulse system measurement system, including:
[0029]Step 1. The basic method for obtaining the angular error signal of the amplitude and difference monopulse radar is to perform sum and difference processing on the signals received by the two partially overlapping beams of the antenna in an angular plane at the same time, and obtain the corresponding sum and difference beams respectively The sum and difference signals, where the difference signal is used to determine the angular error signal in the angle plane, and the sum beam signal is used to detect the target. The two partially overlapping beams are respectively received by two feed sources in the same antenna, and the center of the overlapping part of the two beams is the direction of the el...
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The invention discloses a measurement method for improving the target angle detection precision by the pulse system measurement system, and is used to detect the target radar system by rotating the antenna, especially in the case of facing the high rotation speed of the antenna to improve the detection efficiency and improve the target measurement accuracy cannot take into account. The invention provides a method for combining a sliding window detection with a single pulse radar and a difference beam signal angle measurement angle, so that while improving the accuracy of the target measurement, satisfying the need for high-speed rotation of the antenna to improve the detection efficiency. The method has the key that avoiding the influence of the temperature drift on measurement precision of the analog circuit of the difference beam signal branch, and has the advantage of stable performance.
Description
technical field [0001] The invention relates to a measurement method for improving the accuracy of target angle detection by a pulse system measurement system. Background technique [0002] Usually, the radar rotates the antenna to drive the beam to move, and the beam smoothly scans the entire detection area; when the beam sweeps over the target to be measured, the spatial position of the target can be obtained, and the distance of the target and the angle information relative to the antenna can be detected. Target detection is to detect and judge whether there is a target based on the echo information received by the receiver, and calculate the coordinate position at the same time, which is usually called point trace extraction. Before point trace extraction, MTD moving target detection processing and constant false alarm processing are generally carried out to reduce the false alarm rate, background objects and meteorological interference, and improve the signal-to-noise r...
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IPC IPC(8): G01S13/50G01S7/41
CPCG01S7/411G01S7/415G01S13/50
Inventor 闫修林王冉钱葵东宋建宇崔自峰谢亚妮
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP