Microwave signal processing system and method

Abstract

The embodiment of the invention provides a microwave signal processing system and method, and relates to the technical field of communications. The system comprises an optical frequency comb, a firstintensity modulator, a filter, a pulse shaper, a time lens and a dispersing component; the first intensity modulator receives an external input microwave radio frequency signal and a comb-like ultra-short pulse laser signal generated by the optical frequency comb, and modulates the microwave radio frequency signal to the comb-like ultra-short pulse laser signal to obtain a radio-over-fiber signal;the bandwidth of the radio-over-fiber signal is filtered and amplified by the optical filter; a first optical pulse signal is obtained after the radio-over-fiber signal with the amplified bandwidth passes through the pulse shaper; the time lens modulates a chirped phase to the first optical pulse signal to obtain a chirped optical pulse; and the dispersing component de-chirps the chirped opticalpulse to obtain a delayed optical pulse signal. The scheme provided by the embodiment of the invention can improve the frequency resolution of the microwave radio frequency signal that can be processed by the microwave signal processing system.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a microwave signal processing system and method. Background technique [0002] In technical fields such as wireless communication and military radar, microwave signal processing systems are usually used to obtain the microwave signal spectrum of microwave radio frequency signals. However, when the microwave signal processing system acquires the spectrum of the microwave signal, the observation bandwidth is usually limited by the sampling rate of the analog-to-digital conversion and the computing power of the digital signal processing. Direct analog-to-digital conversion, or, requires the above-mentioned microwave signal processing system to have parallel devices with very powerful computing capabilities, which is not feasible for many motion platforms (eg, satellites, aircraft, etc.). Therefore, in order to solve the above-mentioned problems in the microwave signa...

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Problems solved by technology

However, when the above-mentioned microwave signal processing system is used to obtain the microwave signal spectrum of the microwave radio frequency signal, the frequency resolution of the microwave radio frequency signal that the above microwave signal processing system can process will be limited by the dispersion value of the dispersion element, and it cannot obtain large bandwidth and high resolution. The microwave signal spectrum of the microwave radio frequency signal

Ordinary optical devices such as dispersion compensating fiber or fiber Bragg grating cannot realize the acquisition of the microwave signal spectrum of the microwave radio frequency signal with a frequency resolution of 100MHz

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