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Multi-user transceiver design method in visible light MIMO system

A design method and multi-user technology, applied in the field of visible light MIMO, can solve problems such as narrow application range

Active Publication Date: 2018-11-02
上海瀚芯实业发展合伙企业(有限合伙)
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  • Application Information

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Problems solved by technology

[0003] Existing work on multi-user transceivers in VLC is mainly based on ZF (Zero-Forcing) and BD (Block Diagonalization) precoding transceiver algorithms, most of them limit the modulation method used to zero-mean modulation, so the scope of application is narrow
In addition, when optimizing the precoding matrix, a matched filter is generally used at the receiving end, which limits the receiving matrix

Method used

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  • Multi-user transceiver design method in visible light MIMO system
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Embodiment Construction

[0049] The present invention will be described in detail below using specific examples.

[0050] 1. Analysis of technical problems

[0051] 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, assume that the number of sending arrays and receiving users is T and K, and the number of PIN tubes included in the kth user is recorded as N k , the total number of PIN tubes is N sum .

[0052] The sending array can transmit multiple data information at the same time, and the information sent to the kth user is expressed as Among them, L k Indicates the number of data streams received by the kth user, s k,j Indicates the modulation symbol, because in the actual transmission process, the amplitude of the modulation symbol is limited, that is, the f...

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Abstract

The invention discloses a multi-user transceiver design method in a visible light MIMO system, and belongs to technical field of visible light communication. On the condition that the transmitting light power is limited, the problem that in the multi-user MIMO-VLC system, users intervene mutually exists, joint optimization is conducted on a transmitting precoding matrix and a receiving balancing matrix, and therefore the signal leakage-to-noise ratio of the system can be maximum. Transmitting precoding is conducted on a transmitter to reduce the channel correlation, and then receiving balancing is conducted on a receiver to restore transmitted data. Compared with the prior art, precoding of the transmitter and receiving balancing of the receiver are comprehensively designed, and the maximum signal leakage-to-noise ratio criterion-based transceiver design method for signal transmission on the condition that the light power is limited is proposed.

Description

technical field [0001] The present invention relates to visible light MIMO technology, in particular to a design method for a multi-user transceiver in a visible light MIMO system. Background technique [0002] In the existing work, for the design of the multi-user MIMO-VLC transceiver, Jian Chen et al. first proposed a scheme to eliminate the multi-user interference of the multi-user MIMO-VLC system by using the block diagonalization algorithm, and then, for The THP algorithm with better performance is studied, and the performance analysis of the traditional THP algorithm and the THP optimization scheme is carried out. LiBaolong et al. designed an optimal transceiver based on the characteristics of non-negative optical signals and limited maximum optical intensity in the VLC system, and took the maximum mean square error between the transmitting and receiving signals as the optimization goal, and found the optimal transceiver by solving the convex second-order cone method. ...

Claims

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Application Information

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IPC IPC(8): H04B10/116H04L25/03H04B7/0452H04B7/0456
CPCH04B7/0452H04B7/0456H04B10/116H04L25/0391Y02D30/70
Inventor 陈明许瑞宁杨阳黄立新
Owner 上海瀚芯实业发展合伙企业(有限合伙)
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