Multi-band optical radio frequency system and method based on weak mode group coupling and probability shaping
An optical radio frequency and multi-band technology, applied in the field of optical transmission, can solve the problems of high bit error rate, low flexibility, small transmission capacity, etc., to achieve performance improvement, increase communication capacity, increase flexibility and applicability Effect
Active Publication Date: 2021-02-09
NANJING UNIV OF INFORMATION SCI & TECH
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[0006] The technical problem to be solved by the present invention is to provide a multi-band optical radio frequency system and method based on weak mode group coupling and probability shaping to solve the problems of high bit error rate, low flexibility and small transmission capacity of the traditional multi-band optical radio system
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[0035] The technical solutions of the present invention will be clearly and completely described below through specific embodiments.
[0036] The present invention provides a multi-band optical radio frequency system based on weak mode group coupling and probability shaping, and its system block diagram is as follows figure 1 As shown, it includes a multi-carrier generation module, a wave splitter, a first mode demultiplexer, a second mode demultiplexer, a QAM modulation module, a mode multiplexer and a millimeter wave frequency selection module, and the multi-carrier generation module Connecting with the wave splitter is used to divide the generated multi-carrier into the main carrier used as the carrying signal and the sub-carrier used for photoelectric conversion, and the wave splitter is respectively demultiplexed with the first mode demultiplexer and the second mode connected to the main carrier and the subcarriers for mode grouping respectively, the first mode demultiple...
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The invention relates to a multi-band optical radio frequency system based on weak mode group coupling and probability shaping, including a multi-carrier generation module, a wave splitter, a first mode demultiplexer, a second mode demultiplexer, a QAM modulation module, a mode A multiplexer and a millimeter-wave frequency selection module, the multi-carrier generation module is connected to a demultiplexer, and the demultiplexer is connected to a first mode demultiplexer and a second mode demultiplexer respectively, and the first mode demultiplexer is connected to the demultiplexer. The mode demultiplexer is connected to the QAM modulation module, the second mode demultiplexer and the QAM modulation module are both connected to the mode multiplexer, and the mode multiplexer is connected to the millimeter wave frequency selection module. The technical solution of the present invention can effectively realize the performance improvement of the short-distance communication system in terms of transmission capacity and bit error rate. The system can reasonably select the millimeter wave band required for wireless communication according to the environment and user needs, which greatly increases the flexibility and applicability of the system.
Description
technical field [0001] The invention relates to the technical field of optical transmission, in particular to a multi-band optical radio frequency system and method based on weak mode group coupling and probability shaping. Background technique [0002] As we all know, Radio Frequency over Fiber (RoF) technology for transmitting wireless signals through optical fiber media is a promising technology, which has the advantages of large capacity, long transmission distance, and low loss. The RoF system is mainly composed of a central station, optical fiber links, and base stations. The central station modulates the baseband signal onto the optical carrier, and then transmits it to the base station through an optical fiber link, and then transmits it through the antenna after undergoing photoelectric conversion in the base station, and finally receives and uses it in the mobile terminal (user). RoF can realize the transmission of microwave signals with large bandwidth and low di...
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IPC IPC(8): H04B10/25H04B10/2575H04B10/2581H04L27/34
CPCH04B10/25752H04B10/25758H04B10/25759H04B10/2581H04L27/3411H04B10/25891
Inventor 刘博吴泳锋张丽佳赵建业赵立龙孙婷婷忻向军毛雅亚刘少鹏宋真真王俊锋哈特姜蕾
Owner NANJING UNIV OF INFORMATION SCI & TECH