A microwave landing all-digital multipath interference signal simulation method and system

Abstract

The invention discloses a microwave landing full digital multipath interference signal simulation method and system. The method comprises the following steps: setting a working mode: a common azimuthfull cycle signal or high speed azimuth full cycle signal; generating a corresponding time base signal according to the working mode, when an FPGA (field programmable gate array) works, judging a current working mode through the time base signal, controlling signal generation time according to the current working mode, and generating a corresponding signal accordingly; setting an output signal type, wherein the signal type includes: having noninterference or interference; outputting the signals of a preset working mode and a preset output signal type; receiving a selection instruction for a user to select a signal from output signals, and outputting a main path analog signal, or, the main path analog signal and a multipath analog signal according to the selection instruction; enabling themain path analog signal and the multipath analog signal to be superimposed so as to obtain a multipath interference signal; enabling the main path analog signal or multipath interference signal to beconverted into an analog signal through a digital-to-analog converter, and generating a baseband signal through a signal conditioning circuit.

Description

technical field [0001] The present disclosure relates to a microwave landing all-digital multipath interference signal simulation method and system. Background technique [0002] The multipath interference signal is an interference signal relative to the main path, which is used to test the anti-interference ability of the airborne receiver. The simulation of microwave landing multipath interference signals traditionally uses analog circuits as the main implementation method. The corresponding main path signals and multipath interference signals are realized through different analog circuits, and then the corresponding functional signals are combined synchronously through switches and adders. Generate corresponding analog signals. This method has complex hardware circuit design, high cost, poor flexibility, large volume and inconvenient portability. At the same time, the clock management is relatively loose, and it takes a lot of debugging time to ensure signal accuracy, a...

AI Technical Summary

Problems solved by technology

This implementation method lacks an accurate clock management solution, and it is difficult to realize synchronization signals, and it is difficult to achieve particularly high accuracy

[0005] At present, the simulation of microwave landing multipath interference signals is generally realized by means of analog circuits. The implementation method is cumbersome, the circuit design is complicated, the equipment is large in size, the development efficiency is low, and the requirements for designers are high.

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