Capacity testing method based on secondary radar interrogator

Abstract

The invention provides a capacity testing method based on a secondary radar interrogator. The capacity testing method comprises the steps: according to externally set initial parameters, a testing mode is selected to generate simulation targets in sectors; when a test is started, the current distance between each simulation target and the interrogator is calculated according to real-time parameters of the simulation targets in the single sectors, when the decoding gate count is matched with the current distance, encoding is triggered to conduct target encoding single-cycle time counting, whenthe target encoding single-cycle time count is equal to 10, the pulse encoding timing sequence is started to be responded according to a standard A/C mode, and ASK codes are output; and according to the sum and difference of a real target relative to the system orientation, and the phase characteristic of a control wave beam, the sum and difference of the current simulation target, control channelvideo signals and symbol bits are generated in a simulation mode and output. Fully digitized target aircraft response signal simulation is conducted through FPGA software, and thus the testing cost can be lowered; and a plurality of target aircrafts can be simulated to meet the need of saturation testing of the processing capacity of the secondary radar interrogator.

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 s

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