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Method for microwave photon link based on full light spectrum utilization and post-compensation technology

A microwave photonic link, full spectrum technology, applied in the field of realizing microwave photonic links, can solve the problems of low computational complexity, reducing optical power, and reducing system gain, etc.

Active Publication Date: 2013-03-20
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

First, the filter filters out the optical carrier to reduce the optical power and system gain
Second, there is currently no post-compensation algorithm for digital signal processing with low computational complexity to suppress distortion and improve dynamic range

Method used

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  • Method for microwave photon link based on full light spectrum utilization and post-compensation technology
  • Method for microwave photon link based on full light spectrum utilization and post-compensation technology
  • Method for microwave photon link based on full light spectrum utilization and post-compensation technology

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Embodiment Construction

[0018] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] figure 1 The overall system structure diagram of the microwave photonic link based on full-spectrum utilization and post-compensation technology is described in , where S101 is the input microwave signal, which is modulated to S103 by the photoelectric phase modulator S102: the light provided by the continuous optical laser on the carrier. The modulated optical-carrying microwave signal passes through the second photoelectric phase modulator S104, which is driven by the microwave local oscillator represented by S105, and converts the optical-carrying microwave signal from high frequency to the difference frequency between S101 and S105, thereby realizing The down conversion is turned on. The down-converted signal carried by the light is used by the full-spectrum utilization module to utilize both the transmission spectrum and the reflection spec...

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Abstract

The invention provides a method for a microwave photon link based on a full light spectrum utilization and post-compensation technology, which comprises the following steps: loading a received microwave signal onto light by using two cascaded electro-optical phase modulators and carrying out all-optical down frequency conversion; depending on a mould composed of a polarization-maintaining circulator, a fiber Bragg grating (FBG) and a balanced detector, simultaneously utilizing a transmission spectrum and a reflection spectrum of a grating; and then utilizing cosine and sine functions for DSP (Digital Signal Processing). The method has the beneficial effects that the system gain is effectively improved by utilizing the energy of a whole light spectrum, and the system linearity is improved by utilizing a DSP algorithm with lower complexity, and further, the dynamic range is improved.

Description

technical field [0001] The invention relates to a method for realizing a microwave photon link, more specifically, a post-compensation method for full spectrum utilization and digital domain. Background technique [0002] Microwave communication can be transmitted in any direction, easy to build and reconstruct, and realize the interconnection with mobile devices; the emergence of cellular systems makes microwave communication have high spectrum utilization. However, the limited bandwidth of the microwave frequency band has become a serious problem at present, and people have begun to consider realizing wireless communication in a higher microwave frequency band or even millimeter waves. However, the loss of the millimeter wave band in the atmosphere is very large. For example, the transmission loss of the 60GHz signal in the atmosphere is as high as 14dB / km, which means that the channel frequency can be reused more frequently in cellular mobile communications. However, the...

Claims

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Application Information

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IPC IPC(8): H04B10/2575
Inventor 喻松蒋天炜李健骆璁张阮彬谢倩顾畹仪
Owner BEIJING UNIV OF POSTS & TELECOMM
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