A design method for visible light mimo system transceiver

A design method and transceiver technology, applied in the field of visible light MIMO, can solve problems such as affecting the scope of application of transceivers

Active Publication Date: 2020-08-25
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the additional restrictions, it affects the scope of application of the transceiver

Method used

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  • A design method for visible light mimo system transceiver
  • A design method for visible light mimo system transceiver
  • A design method for visible light mimo system transceiver

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Embodiment Construction

[0044] The present invention will be described in detail below using specific examples.

[0045] 1. Analysis of technical problems

[0046] The scenario where the technical problem exists is as follows: There are several LED lights and several distributed PD receivers in the system. Among them, LED lights are placed on the indoor ceiling, which has the functions of lighting and data transmission. Such as figure 1 As shown, the sending user and the receiving user are both one.

[0047] The sender includes N t LED array, the multi-channel data transmitted by the LED is expressed in the form of vector, which is expressed as s=[s 1 ,...,s j ,...,s K ] T , where s j Indicates the data of the jth channel, and K is the number of sent data streams. The sending end first performs precoding processing on the modulated message data, that is, the data is multiplied by the precoding matrix, and then a DC bias is added to generate a positive signal for the LED to emit light, thereb...

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Abstract

The invention discloses a visible light MIMO system transceiver design method and belongs to the technical field of visible light communication. According to the method, under the condition that transmitting optical power is limited, for signal transmission features of a visible light MIMO system, amplitude constraint and mean constraint conditions of signals are provided, and on the basis, jointoptimization is carried out on a transmitting precoding matrix and a receiving balancing matrix, so a signal to noise ratio of the system is maximized. Transmitting precoding is carried out at a transmitting end, so channel correlation is reduced; and receiving balancing is carried out at a receiving end, so transmitted data is recovered. Compared with the prior art, the method has the advantagesthat through comprehensive consideration of the transmitting precoding of the transmitting end and the receiving balancing of the receiving end, the transceiver design method based on a maximum signalto noise ratio criterion is provided, under the condition that the optical power of transmitting signals is limited.

Description

technical field [0001] The invention relates to visible light MIMO technology, in particular to a design method for a transceiver of a visible light MIMO system. Background technique [0002] In the existing work, for the design of the MIMO-VLC transceiver, Thilo Fath and others adopted the MIMO technology in wireless communication to design the MIMO-VLC transceiver, including repetitive coding, spatial multiplexing and other technologies, and verified The MIMO technology can provide gains for indoor optical communication systems including line-of-sight channels. Ki-Hong Park et al. applied the method of resource allocation to the visible light system and designed a spatial multiplexing system based on singular value decomposition. However, the technology adopted in the above article is not designed for the VLC system, so it cannot make full use of the capability of the MIMO technology. According to the characteristics of VLC, Chen Gang limited the modulation scheme to zer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/116H04B10/40H04B7/0413H04B7/0456
CPCH04B7/0413H04B7/0456H04B10/116H04B10/40Y02D30/70
Inventor 陈明许瑞宁杨阳黄立新
Owner SOUTHEAST UNIV
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