A Calibration Method of Space-Earth Wave Array Based on Direct Arrival Wave
A calibration method, space-to-earth wave technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of difficult to arrange calibration sources and difficult implementation of active calibration, so as to save development and maintenance costs, solve array calibration problems, and reduce the amount of computation small effect
Active Publication Date: 2016-09-07
THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology
Since the receiving station is located by the sea, it is difficult to arrange a special calibration source, and it is difficult to implement conventional active calibration
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Embodiment 1
[0035] Embodiment 1. This embodiment discloses a direct wave-based sky-earth wave array calibration method, which includes the following steps: Step 1, a transmitting device transmits a detection signal, and a multi-channel receiving device synchronously receives the detection signal to obtain a received signal; Step 2, Perform pulse compression on the received signal obtained in step 1 to obtain an A-type spectrum; step 3, perform coherent accumulation on the A-type spectrum obtained in step 2 to obtain a range Doppler spectrum; step 4, compare the range Doppler obtained in step 3 The spectrum is searched and detected to obtain the direct wave signal; step 5, the direct wave signal obtained in step 4 is used to perform amplitude and phase calibration to obtain the calibration coefficient of the channel. The last 4 steps are the signal processing process. Among them, the second and third steps are the accumulation process, in essence, the energy of the direct wave signal is mor...
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The invention discloses a ground and sky wave array calibration method based on direct waves. The method comprises the following steps: step 1, an emission device emitting detection signals, a multichannel receiving device synchronously receiving the detection signals, and obtaining receiving signals; step 2, performing pulse pressurizing on the receiving signals obtained in step 1 to obtain an A-type spectrum; step 3, performing coherent accumulation on the A-type spectrum obtained in step 2 to obtain a distance Doppler spectrum; step 4, performing searching and detecting on the distance Doppler spectrum obtained in step 3 to obtain direct wave signals; and step 5, performing amplitude phase calibration by use of the direct wave signals obtained in step 4 to obtain a calibration coefficient of a channel. According to the method disclosed by the invention, antenna calibration is carried out by use of the direct waves, an additional calibration source is unnecessary, the accuracy and the stability are high, the method is simple, the operation amount is small, the radar development and maintenance cost is saved, and the problem of array calibration of a ground and sky wave radar is solved.
Description
Technical field [0001] The invention relates to a high-frequency sky-ground wave radar array calibration method, in particular to a sky-earth wave array calibration method based on direct waves. Background technique [0002] The high-frequency sky-to-ground wave radar is a new type of high-frequency over-the-horizon radar. It uses sky wave transmission and ground wave reception. The transmitting station is located in the interior, the receiving station is located on the coast, and the receiving end uses an active phased array. The phase error is calibrated. Since the receiving station is at the seaside, it is not easy to arrange a special calibration source, and it is difficult to implement conventional active calibration. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a direct wave-based calibration method for the sky-earth wave array. [0004] The present invention adopts the following technical solutions: [0005] A di...
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IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 黄晓静杨龙泉杨雷鸣
Owner THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP