A radar calibration method and system based on wireless radio frequency relay transmission technology

Abstract

The invention provides a radar calibration method based on the wireless radio frequency relay transmission technology. The radar calibration method comprises the following steps that a wireless radio frequency relay transmission radar calibration system including radar and a measured target is provided; the radar transmits detection signals; a radio frequency relay transmission processing task load receives the detection signals and forwards the detection signals to the measured target; the measured target receives the detection signals forwarded by the radio frequency relay transmission processing task load and performs signal feedback; the radio frequency relay transmission processing task load receives the feedback signals and forwards the feedback signals to the radar; the radar receives the feedback signals so as to obtain the measurement position information of the measured target; the true value position of the measured target is measured so as to obtain true value position information; difference value processing is performed on the measurement position information and the true value position information of the measured target so as to obtain error information; and the radar is calibrated by using the error information so as to complete the calibration process. The radar calibration method has the following beneficial effects so that the signal source can be arranged on the ground so that delay, Doppler frequency shift and other parameters of the signals can be controlled.

Description

technical field [0001] The invention belongs to the field of radar calibration, in particular to a radar calibration system and method based on wireless radio frequency relay transmission technology. Background technique [0002] Radar calibration refers to the process of comparing the target measurement value obtained by radar detection with the true value of the target position, and calculating the distance and angle measurement error. This error can be used to further calibrate the radar detection data. Radar calibration is an important measure to ensure the accuracy of radar detection. [0003] According to whether the measured target (generally a cooperative target) moves during calibration, radar calibration can be divided into static calibration and dynamic calibration. Static calibration is mainly to verify the system error of the radar itself; dynamic calibration is mainly to test the dynamic track tracking performance of the radar. [0004] The commonly used sta...

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Problems solved by technology

The military aircraft calibration method is affected by factors such as troop mobilization, airspace control, and weather, and has disadvantages such as cumbersome application procedures, many test restrictions, difficult route adjustment, long cycle, and high cost; the balloon calibration method is similar to the airship calibration method, and the launch of a balloon or airship Both need to apply to the air traffic control department, and have disadvantages such as poor maneuverability, easy to be affected by wind, incapable of route planning, and complicated recovery; the civil aviation aircraft calibration method needs to receive the automatic dependent surveillance system broadcast (ADS-B) of civil aviation aircraft in a responsive manner. ), the broadcast message contains the position information and attitude information of the aircraft, which can be compared with the target information detected by the radar to complete the calibration. It is a relatively convenient and economical calibration method, but the data accuracy and stability of civil aviation aircraft are poor. , cannot carry out high-precision calibration, and is restricted by the route of civil aviation aircraft; the calibration method of civil ships is similar to the calibration method of aircraft, and both use the target position information provided by civil non-cooperative targets and the data measured by radar to conduct comparative analysis to complete the calibration

In the civil ship calibration method, the position information of the ship is obtained by receiving the civil ship Automatic Identification System (AIS) broadcast, but this method also has the disadvantages of poor accuracy, instability, and inability to perform radar elevation calibration.

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