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Visible light communication signal constellation design method, device and system

A visible light communication and signal technology, applied in transmission systems, short-distance systems, electromagnetic wave transmission systems, etc., can solve problems such as inability to achieve system communication performance and optimization

Active Publication Date: 2016-05-04
THE PLA INFORMATION ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] This application discloses a visible light communication signal constellation design method, device and system, so as to solve the problem that the optimization of system communication performance cannot be realized by using the existing technology

Method used

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  • Visible light communication signal constellation design method, device and system
  • Visible light communication signal constellation design method, device and system
  • Visible light communication signal constellation design method, device and system

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Embodiment 1

[0078] Such as figure 1 Shown is a flow chart of a visible light communication signal constellation design method disclosed in Embodiment 1 of the present application. This design method is applicable to optical communication systems, especially indoor optical communication systems. In the embodiment of the present application, the figure 2 Shown possesses N t light sources and N r Taking an indoor visible light communication system at a receiving end as an example, the design method mainly includes the following steps:

[0079] Step S101, according to the Lambertian radiation model, the communication model of the visible light communication system and the signal space matrix, determine the total optical transmission power constraint condition of the signal constellation;

[0080] In step S101, based on the 2×N proposed by the embodiment of this application r The communication model under the structure of the optical communication system is shown in formula (3):

[0081] ...

Embodiment 2

[0108] Based on the above-mentioned Embodiment 1 of the present application, a method for designing a visible light communication signal constellation is disclosed, such as figure 1 The channel characteristic parameter λ shown in 1 , lambda 2 and Under different value ranges of , the Euclidean distance to be optimized is processed in combination with non-negativity constraints, and the step S105 of obtaining the optimal distribution of signal constellations corresponding to different situations is based on different value ranges of channel characteristic parameters, the obtained The optimized distribution of the received signal constellation is different, and the specific execution process is as follows:

[0109] When the channel characteristic parameter λ of the visible light communication system 1 ≥λ 2 >0, Time:

[0110] Such as image 3 As shown, it is a schematic flowchart of the optimal distribution of the signal constellation disclosed in Embodiment 2 of the pre...

Embodiment 3

[0166] Based on the method for designing a visible light communication signal constellation disclosed in Embodiment 1 and Embodiment 2 of the present application, the embodiment of the present application also discloses a visible light communication signal constellation design device and a visible light communication system including the visible light communication signal constellation design device. . The specific structure is as follows.

[0167] Such as Figure 5 As mentioned above, it is a schematic block diagram of the structure of a visible light communication signal constellation design device 10 disclosed in Embodiment 4 of the present application, which mainly includes: a unit 11 for determining the total optical transmission power constraints, a channel matrix acquisition unit 12, and a decomposition unit 13, to be optimized Euclidean distance acquisition unit 14 and optimized distribution unit 15 .

[0168] Among them, the optical transmission total power constrai...

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Abstract

The invention discloses a visible light communication signal constellation design method, device and system. The method comprises the following steps: establishing a communication model and a signal space matrix of a visible light communication signal based on a Lambertian radiation model, and determining total light sending power of a signal constellation; sending a training sequence estimation channel matrix based on the communication model, and carrying out singular value decomposition on the channel matrix to obtain channel characteristic parameter matrixes ^ and V, wherein the influence of the channel characteristic parameter matrix V is represented by rotating a signal constellation point for an angle to further obtain channel characteristic parameters lambda 1, lambda 2 and (the formula is as shown in the specification), obtaining an Euclidean distance to be optimized between any two constellation points of a receiving end based on the signal constellation space matrix after angle rotation in combination with the channel characteristic parameter matrix ^, processing the Euclidean distance to be optimized under different value ranges of the channel characteristic parameters lambda 1, lambda 2 and (the formula is as shown in the specification) in combination with a non negative constraint condition to obtain corresponding optimized signal constellation distribution under different conditions, so as to realize the optimal communication performance of the visible light communication system.

Description

technical field [0001] The present application belongs to the technical field of wireless communication, and in particular, relates to a method, device and system for designing a visible light communication signal constellation. Background technique [0002] In recent years, with the development of solid-state lighting technology (Solid-state lighting), especially the large-scale commercial use of LED (Light-emitting diode), as a new wireless communication method, visible light communication technology refers to the use of fluorescent lamps or The high-speed bright and dark flickering light signals emitted by LEDs that cannot be felt by the naked eye are used to transmit data information. This method uses the light that the human body has been exposed to for a long time as the transmission medium, so compared with the traditional radio frequency signal, it has no radiation damage, and has the great advantage of making up for the congestion of the radio frequency bandwidth, s...

Claims

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Application Information

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IPC IPC(8): H04B10/116H04B10/50H04B10/516H04B10/564
CPCH04B10/116H04B10/502H04B10/516H04B10/564
Inventor 张剑蔡恒斌朱义君于宏毅邬江兴温建华田忠骏仵国锋汪涛胡赟鹏
Owner THE PLA INFORMATION ENG UNIV
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