A Capacity Testing Method Based on Secondary Radar Interrogator

Abstract

The invention provides a capacity testing method based on a secondary radar interrogator, which selects a test mode according to an externally set initial parameter to generate a simulated target in a sector; The current distance between each simulated target and the interrogator, when the count of the decoding gate matches the current distance, the code is triggered, and the single-cycle time of the target code is counted. When the count of the single-cycle time of the target code is equal to 10, the standard A / C mode response pulse code sequence, output ASK code; according to the sum and difference of the real target relative to the system orientation, and the amplitude and phase characteristics of the control beam, the sum and difference of the current analog target, as well as the video signal and sign bit of the control channel are simulated and output. The invention performs full-digital target aircraft response signal simulation through FPGA software, which can reduce test cost; can realize simulation of a large number of target aircraft, and satisfies the requirement of performing saturation test on secondary radar interrogation machine processing capability.

Description

technical field [0001] The invention relates to the field of secondary radar, in particular to a capacity testing method based on a secondary radar interrogator. Background technique [0002] Secondary radar can accurately detect the azimuth, altitude, and speed information of aircraft, and is widely used in air traffic control fields such as military and civilian air route flight surveillance, daily and military exercise flight support, etc. In recent years, due to the substantial increase in military and civilian aviation flight traffic, the number of target aircraft in the airspace has increased significantly, which puts forward higher requirements on the processing capabilities of secondary radars (especially the processing capabilities of the digital part). [0003] The processing of the response signal of the target aircraft by the secondary radar interrogator is divided into the following steps: front-end analog signal reception, analog / digital signal conversion, resp...

AI Technical Summary

Problems solved by technology

[0005] 1. Response simulation equipment needs to be used to build an external test environment, resulting in increased test costs and the inability to simulate the target quantity in a saturated state of the system;

[0006] 2. It is impossible to simulate a large number of targets, and it is impossible to perform a saturation test on the processing capability of the secondary radar interrogator;

[0007] 3. It is impossible to simulate multiple scenarios with uneven distribution density of target aircraft in the real airspace environment;

[0008] 4. The amplitude and phase characteristics of the target aircraft relative to the scanning azimuth cannot be simulated, and the calculation accuracy of the target azimuth cannot be verified

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