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Adaptive anti-multipath interference photon radio frequency receiving front end and method

A technology of multi-channel interference and radio frequency reception, which is applied in the field of microwave photonics, can solve problems such as difficult to achieve multi-channel radio frequency interference suppression, difficult to deal with time-varying interference signals, complex system structure, etc., to achieve no optical interference effect and simplify the system structure , the effect of high adjustment accuracy

Active Publication Date: 2018-09-04
DALIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0009] The invention provides an adaptive anti-multi-channel interference photon radio frequency receiving front end, which effectively solves the problems in the background technology that it is difficult to suppress multi-channel radio frequency interference, the system structure is complex, the stability is poor, and it is difficult to deal with the time-varying interference signals in the actual application environment.

Method used

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  • Adaptive anti-multipath interference photon radio frequency receiving front end and method
  • Adaptive anti-multipath interference photon radio frequency receiving front end and method
  • Adaptive anti-multipath interference photon radio frequency receiving front end and method

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[0051] figure 1 It is a structural block diagram of an adaptive anti-multi-channel interference photon radio frequency receiving front end. The signal received by the receiving antenna r(t)=s(t)+n 1 (t)+n 2 (t)+n 3 (t)+...+n N (t), where s(t) is useful signal, n 1 (t), n 2 (t), n 3 (t),...,n N (t) is an interference signal, modulated to the optical carrier f of the single-wavelength laser source output by the first electro-optical modulator C0 superior. figure 2 It is a schematic diagram of the frequency spectrum of the optical-carrying radio frequency signal output by the first electro-optic modulator. The phases of the left and right bands of the optical-carrying radio frequency signal are inverse phase, and arrows of different sizes indicate signals r(t) of different amplitudes and phases received by the receiving antenna. The optical-carrying radio frequency signal enters the single-band-pass optical filter, and the right band is filtered by the single-band-pass ...

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Abstract

The invention discloses an adaptive anti-multipath interference photon radio frequency receiving front end and method, belonging to the technical field of microwave photonics. The photon radio frequency receiving front end and method include the following steps: adopting a multi-wavelength laser source and a wavelength division multiplexing structure to obtain a multi-path optical-carrier microwave reference signal, and adopting a controllable optical attenuation array and a controllable optical delay array to respectively perform optical domain delay and amplitude adjustment on the multi-pathreference signal; and adopting an adaptive feedback control loop to monitor the time variation of interference signals, and performing feedback control on the amplitude and delay of the multi-channelreference signal to achieve adaptive and effective suppression of multi-path interference signals. The adaptive anti-multipath interference photon radio frequency receiving front end and method havethe advantages of simple system structure, large bandwidth, high amplitude and delay control accuracy, and good system stability.

Description

technical field [0001] The invention belongs to the field of microwave photon technology, and in particular relates to an adaptive anti-multipath interference photon radio frequency receiving front end and a method. Background technique [0002] Radio frequency self-interference exists in many applications, such as a new generation of simultaneous and same-frequency full-duplex wireless communication, microwave relay communication, continuous wave radar, and ship electromagnetic compatibility. Taking simultaneous same-frequency full-duplex wireless communication as an example, it uses the same frequency to realize simultaneous transmission and reception of uplink and downlink signals. Compared with frequency division duplex technology and time division duplex technology, it realizes spectrum resource utilization and data throughput. volume doubling. However, in the same-frequency full-duplex communication process, the high-power self-interference signal of the transmitting ...

Claims

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Application Information

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IPC IPC(8): H04B10/70H04B10/69H04B10/67
CPCH04B10/67H04B10/674H04B10/6972H04B10/70
Inventor 韩秀友王硕王瀚峤武震林赵明山
Owner DALIAN UNIV OF TECH
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