Microwave Broadband Signal Processing Method and Microwave Photonic Channelized Receiver

Abstract

The invention discloses a microwave broadband signal processing method and a microwave photon channelized receiver, and the microwave broadband signal processing method comprises the following steps:firstly, carrying out the spectrum slicing of a microwave broadband signal based on a photoelectric hybrid loop; then, carrying out carrier extraction and wavelength division demultiplexing parallel processing on the optical signal after spectral slicing; and finally, constructing a coupling network, coupling each information wavelength output by wavelength division multiplexing with a corresponding optical carrier to enter a photoelectric detector array, completing envelope detection, and finally realizing multi-path microwave signal output. According to the invention, channelized receiving is carried out on broadband microwave signals by using a microwave photon technology; based on the advantages of low loss, large bandwidth, electromagnetic interference resistance and the like of the optical fiber, the electronic bottleneck of a traditional electronic microwave channelized receiver can be broken through, and compared with the traditional channelized receiver, the optical fiber channelized receiver has the functions of ultra-large receiving bandwidth, tunable channel center frequency and tunable channel gap, and can be widely applied to the fields of communication, electronic warfare, aerospace and the like.

Description

technical field [0001] The invention relates to the intersecting field of microwave technology and optical communication technology, in particular to a microwave broadband signal processing method and a microwave photon channelization receiver. Background technique [0002] The microwave channelization receiver is a microwave receiving system used to divide the received microwave signal into channels in the frequency domain, divide the broadband signal into multiple narrowbands, and sense and receive signals of different bands in parallel in real time. With the increasingly harsh military environment such as electronic countermeasures, many electronic bottlenecks in traditional microwave circuit systems cannot be ignored, which seriously affects the improvement of system performance. First of all, the current microwave devices have great losses in the high-frequency band, and cannot support the processing of ultra-wideband and multi-band radio frequency signals. In particula...

AI Technical Summary

Problems solved by technology

With the increasingly harsh military environment such as electronic countermeasures, many electronic bottlenecks in traditional microwave circuit systems cannot be ignored, which seriously affects the improvement of system performance.

First of all, the current microwave devices have great losses in the high-frequency band, and cannot support the processing of ultra-wideband and multi-band radio frequency signals. In particular, coaxial cables, as radio frequency transmission media, have weak anti-electromagnetic interference ability and are affected by climate change. Seriously, the long-distance transmission of high-frequency signals will cause huge loss, the loss is as high as 360dB / km@5.8GHz, and it will increase with the increase of radio frequency, thus limiting the high-frequency extension of the system; in addition, directly using When digital technology is used to process ultra-wideband signals, channelized reception requires high-fidelity digital bandwidth, and digital signal processing is used to mine target information. The increase in bandwidth is also a great challenge to high-speed processing chips, high-speed sampling modules and high storage memory. , the low-cost mass production of these devices cannot be realized in the short term; finally, the variability of the carrier center frequency of the signal to be received and the time-varying of the multi-carrier interval put forward higher requirements for the traditional channelized receiving system. It is difficult to realize the tunable channel center frequency and channel spacing in the microwave frequency band

To sum up, the performance of broadband radio frequency channelized receiving systems that process signals in the traditional electrical domain is limited, and it is difficult to cope with the current complex electromagnetic environment and military and civilian needs.

Images