Visible light communication signal constellation design method, device and system

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...

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