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Method of acquiring characteristics of indoor visible light communication channel

A technology of visible light communication and channel characteristics, which is applied in the field of obtaining indoor visible light communication channel characteristics, can solve problems such as only suitable, without considering the occlusion effect, and achieve the effect of improving practicability and expanding the scope of application

Active Publication Date: 2017-08-04
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is only for open rooms and does not consider the occlusion effect
The disadvantage of this method is that the visual function can only take 0 or 1, that is, it is only suitable for fixed occluders

Method used

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  • Method of acquiring characteristics of indoor visible light communication channel
  • Method of acquiring characteristics of indoor visible light communication channel
  • Method of acquiring characteristics of indoor visible light communication channel

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Embodiment Construction

[0026] Refer to attached figure 1 , to further describe the specific steps of the present invention.

[0027] Step 1, according to the following formula, calculate the impulse response of the direct link of the indoor visible light communication channel in an unobstructed environment:

[0028]

[0029] Among them, h(S, R) represents the response of the receiver R of the indoor visible light communication channel to the direct link pulse of the light source S in the unobstructed environment, and m represents the Lambert exponent of the light source S in the indoor visible light communication channel in the unobstructed environment , which is any positive number, A represents the physical area of ​​the receiver R of the indoor visible light communication channel in a non-blocking environment, π represents the circumference ratio, and L represents the physical center point of the light source S of the indoor visible light communication channel to the receiver in a non-blocking...

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Abstract

Disclosed in the invention is a method of acquiring characteristics of an indoor visible light communication channel, which mainly solves problems that the current indoor visible light communication channel model is only based on open rooms but does not consider the shielding effect, and only 0 or 1 can be taken as the value of a visibility function. The technical core of the method is as follow: the quantity of nonquantitative random mobile users entering an indoor region is described by introducing a Poisson count process; the widths and heights of the nonquantitative random mobile users and joint distribution of abscissas and ordinates of the indoor region are described by introducing a probability intensity function; a probability of not shielding a direct beam link of the visible light communication channel by the nonquantitative random mobile users is quantized; and an impulse response and a received signal power value describing channel characteristics are obtained through impulse responses of direct beam links of a classic indoor visible light communication channel model multiplied by the probability of not shielding a direct beam link of the visible light communication channel by the nonquantitative random mobile users. The method can be utilized in the indoor visible light communication environment with multiple mobile users.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for obtaining indoor visible light communication channel characteristics in the technical field of optical communication. The invention can be used to obtain the impulse response and received signal power of indoor visible light communication channels in a mobile multi-user environment. Background technique [0002] Visible light communication based on white light-emitting diode (Light Emitting Diode) has the advantages of low power consumption, high transmission rate, no need for spectrum application, high security, anti-electromagnetic interference, etc., which has attracted the attention of many research institutions and scholars at home and abroad. Up to now, there are still some key problems to be solved in visible light communication. These mainly include: the modulation bandwidth of light-emitting diodes cannot provide ultra-high transmission rates; t...

Claims

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Application Information

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IPC IPC(8): H04B10/116H04B10/079
CPCH04B10/07955H04B10/116
Inventor 董赞扬尚韬高妍杨银堂
Owner XIDIAN UNIV
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