A Closed-loop Amplitude-Phase Test Method for Radar Simulator
A technique for simulating equipment, amplitude and phase testing, applied to radio wave measurement systems, instruments, etc., can solve problems such as changes in system attenuation characteristics and shifting characteristics, decreased accuracy of radar simulation equipment, and long calibration time, etc., to achieve good application Effects of Foreground, Accuracy Improvement, and Test Speed Improvement
Active Publication Date: 2017-11-14
NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH
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[0006] The purpose of the present invention is to overcome the long time required for the calibration of the prior art. After a period of use of the calibrated channel, with the aging of the temperature and the device, the system attenuation characteristics and direction characteristics will change, resulting in the accuracy of the radar simulation equipment. decline, which in turn affects the simulation effect
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[0039] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0040] In the closed-loop amplitude-phase test method for radar simulation equipment of the present invention, the radar receiver can receive the intermediate frequency signal, and in addition to processing the point trace data such as target distance, azimuth, and elevation, the amplitude and phase data of the signal can also be obtained through processing , that is, it has the measurement function of amplitude and phase. Therefore, the attenuation curve of the attenuator in the channel and the phase shifter can be obtained by measuring the traditional instruments such as spectrum analyzer and vector network analyzer by the receiver of the radar simulator with subsequent signal processing. Phas...
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The invention discloses a closed-loop amplitude phase test method for radar simulation equipment. According to the method, a radar receiver can receive a medium-frequency signal, and the amplitude and phase data of the signal can be obtained by processing the signal, namely, the amplitude and phase measurement function can be realized, so that the attenuation curve of an attenuator and the phase shift curve of a phase shifter in a channel can be obtained through measurement by cooperation of the receiver of the radar simulator and subsequent signal processing, instead of conventional instruments such as a frequency spectrograph and a vector network analyzer, the test speed is greatly increased, the channel errors are eliminated, the precision is greatly improved, and the simulated target dot track error values are relatively close to the theoretical value of the equipment. Therefore, the method has a good application prospect.
Description
technical field [0001] The invention relates to a closed-loop amplitude-phase test method for radar simulation equipment, belonging to the technical field of radar target echo simulation. Background technique [0002] The radar simulation equipment is to simulate the actual working process of the radar in the laboratory. The parts that need to be simulated include generating the transmitting signal, generating the target echo signal, simulating the antenna beam synthesis, receiving the target echo signal down conversion, simulating the intermediate frequency reception and gain control, In the process of simulation, a large number of attenuators and phase shifters are required to simulate and control the signal amplitude and phase. Therefore, the simulation accuracy of radar simulation equipment is closely related to the accuracy of attenuators and phase shifters. Therefore, in the simulation Before the experiment, it is necessary to calibrate a large number of attenuators an...
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IPC IPC(8): G01S7/40
CPCG01S7/4021
Inventor 孙永飞朱永前
Owner NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH