Electronic countermeasure-oriented digital radio frequency front-end and radio frequency signal frequency detection method

Abstract

The invention discloses a digital radio frequency front end and a radio frequency signal frequency detection method for electronic countermeasures. The digital radio frequency front-end includes: a radio frequency reception front-end module, a radio frequency frequency detection module, a digital receiver module, a digital transmitter module, and a radio frequency transmission front-end module. The RF receiving front-end module receives the space signal, performs preliminary filtering and amplification processing, and sends it to the RF frequency detection module to judge whether there is a radar signal and obtains a digital RF signal of a specific carrier frequency, and sends it to the digital receiver module to obtain a low-frequency baseband signal and Pass it to the digital transmitter module to generate the interference baseband signal of the same frequency and convert it into an analog radio frequency signal, send it to the radio frequency transmitting front-end module to reduce noise and amplify it, and then transmit it. The invention can receive radar signals of various frequencies with a wide bandwidth and accurately generate interfering radio frequency signals to achieve electronic countermeasure effects, overcome the shortcomings of low frequency and narrow bandwidth of traditional high-frequency signal frequency detection equipment, and meet the needs of modern electronic countermeasure platforms.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a digital radio frequency front end and a radio frequency signal frequency detection method for electronic countermeasures. Background technique [0002] With the development of science and technology, electronic high-frequency signals related to missiles, radars, etc. run through the entire war process, and electronic countermeasures also emerge as the times require. At present, most electronic countermeasure platforms use analog RF front-ends, but the operating frequency range and bandwidth of analog RF front-ends are relatively limited. In order to achieve a wider operating frequency, it is often necessary to divide the operating frequency into several narrower frequency ranges. Each frequency range has Configure an analog RF front-end to work, which results in a large volume and complex structure of the electronic countermeasure platform, which limits its application sc...

AI Technical Summary

Problems solved by technology

[0003] The digital RF front-end has the advantages of wide operating frequency range and bandwidth, high integration, and good channel consistency. Therefore, the digital RF front-end has unique advantages when applied to electronic countermeasure platforms, and can overcome the operating frequency range of the current analog RF front-end based on the traditional design architecture. Narrow, complex system, bulky and other limitations, build a miniaturized, multi-functional, flexible electronic countermeasure platform

The digital RF front-end has the characteristics of miniaturization, and can switch functions such as electronic reconnaissance, interference and anti-interference through software definition, so as to overcome the problems of the traditional analog RF electronic countermeasure platform, such as limited working frequency range, large size, and poor flexibility; The disadvantages of traditional radio frequency signals such as low sampling rate, narrow bandwidth, low rate, and complex structure can better meet the needs of modern electronic countermeasures

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