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Multi-input and multi-output optical communication system and method

An optical communication system, multi-output technology, applied in the field of MIMO optical communication system

Inactive Publication Date: 2012-07-11
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The above multiplexing method has actually separated the transmission channels through demultiplexing when recovering data, and what is converted on each detector is the information of each transmission channel instead of the coupled information transmitted by multiple channels. This is different from wireless The essence of MIMO technology is very different

Method used

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  • Multi-input and multi-output optical communication system and method
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  • Multi-input and multi-output optical communication system and method

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Embodiment Construction

[0045] Such as figure 1 As shown, the light emitting end 11 contains n t Optical transmitting antennas 111-1~n t , which is mainly composed of a light source, including a driving circuit and an optical device, and the light source has different spectral characteristics. The light receiving end 12 contains n r Optical receiving antennas 121-1~n r , mainly composed of a photodetector, including a driving circuit, and an optical device. The photodetector has different spectral response characteristics. no r not greater than n t .

[0046] When working specifically, the original high-speed data stream is firstly space-time coded to form multiple parallel data sub-streams, and the number of data sub-streams is not greater than the number of transmitting antennas n t , each data sub-stream is transmitted in parallel by a certain optical antenna of the optical antenna transmission array; after transmission through the optical fiber / free space multipath channel, if the channel ...

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Abstract

The invention relates to a multi-input and multi-output (MIMO) optical communication system and method. The optical communication system is formed by adopting a plurality of light sources with spectrum differences and a plurality of optical detectors with spectrum response characteristic differences, the spectrum differences of the light sources and the spectrum response differences of the optical detectors ensure that channel impact responses from light sources of all emitters to photoelectric detectors of all receivers are mutually uncorrelated, thus an MIMO channel matrix is obtained, and concentrated MIMO optical communication is realized. According to the invention, MIMO optical communication is realized in an optical fiber channel or free space channel without a complex optical device, thus optical communication rate and reliability are improved.

Description

technical field [0001] The invention relates to a multiple-input multiple-output (MIMO) optical communication system and its realization method, including the MIMO optical communication system and method under the condition of optical fiber channel and free space channel. Background technique [0002] In wireless communication, multiple-input multiple-output (MIMO) technology uses multiple transmit and multiple receive antennas to achieve space division multiplexing, and under the premise of limited spectrum resources and no increase in transmit power, the communication rate is exchanged for smaller system complexity linear increase. MIMO technology is essentially a signal processing technology that utilizes space resources, including space multiplexing technology and transmit diversity technology. The basic principle is that multipath signals experiencing different fading are only partially correlated, and to obtain good diversity performance, the correlation between diver...

Claims

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Application Information

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IPC IPC(8): H04B10/12H04B7/04H04B10/2575
Inventor 刘陈刘德明
Owner HUAZHONG UNIV OF SCI & TECH
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