Radar baseband clutter generating device and method

Abstract

The invention discloses a radar baseband clutter generating device and method. The device includes an FPGA, an ADC, a DAC, a memory, a clock distributor, and a communication interface circuit. According to the method, the FPGA performs hardware initialization, controls the clock distributor to generate clock signals, controls the ADC to sample external radar intermediate-frequency signals under the synchronization of trigger signals, so as to obtain a digital intermediate-frequency sequence, digitally demodulates the intermediate-frequency sequence, stores the demodulated intermediate-frequency sequence to the memory; and the FPGA receives external clutter parameters and a baseband clutter modulation sequence through the communication interface circuit so as to complete baseband clutter modulation, finally controls the DAC to generate baseband analog clutter signals, and outputs hardware working states and the external input clutter parameters through the communication interface circuit. The device and method of the invention are simple in hardware structure and generate different baseband clutters respectively for high-resolution radars and low-resolution radars.

Description

technical field [0001] The invention belongs to the technical field of radar electronic warfare simulation signal simulation, in particular to a radar baseband clutter generation device and method. Background technique [0002] The radar baseband clutter generation device is an electronic device used in radar electronic warfare simulation signal simulators such as radar jamming simulators. The clutter signal generator is an important part of the radar jamming simulator. When generating clutter, the clutter signal is converted to the frequency required by the tested radar by generating a certain baseband clutter signal, and through frequency mixing, frequency multiplication or frequency division. The main technical indicators describing the clutter generation device are: 1) clutter type, 2) signal bandwidth, 3) center frequency, 4) amplitude distribution model, 5) spectral type and spectral width, 6) distance resolution unit length, 7) Doppler frequency, 8) distance range, ...

AI Technical Summary

Problems solved by technology

For the pure software method, since it can only be generated on the data, it cannot generate real clutter signals

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