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Feedback type light source aligning control method in white light communication

A technology of white light communication and control method, applied in free space transmission, short-range systems, etc., can solve the problem of increasing communication bit error rate, and achieve the effect of reducing bit error rate, improving communication quality, and easy to popularize

Inactive Publication Date: 2014-02-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the bit error rate of the communication increases due to the movement of the receiving end relative to the communication light source, which cannot be aligned with the communication light source, and provides a feedback type light source alignment control method in white light communication

Method used

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  • Feedback type light source aligning control method in white light communication
  • Feedback type light source aligning control method in white light communication
  • Feedback type light source aligning control method in white light communication

Examples

Experimental program
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specific Embodiment approach 1

[0015] Specific implementation mode 1: The feedback light source alignment control method in white light communication in this implementation mode includes:

[0016] (1) Set the two-dimensional swing angle value α of the two-dimensional swing mirror according to the relative position of the receiving end and the communication light source x 、α y ;

[0017] (2) Turn on the communication light source, and the area array detector receives the signal beam;

[0018] (3) The processor calculates the two-dimensional coordinate value X of the signal light on the area array detector c , Y c ;

[0019] (4), the processor according to the two-dimensional coordinate value X c , Y c , calculate the two-dimensional deviation angle θx, θy of the communication light source;

[0020] (5) The processor compares the two-dimensional deviation angles θx and θy of the communication light source with the set two-dimensional pendulum angle value α x 、α y After the comparison, the feedback er...

specific Embodiment approach 2

[0024] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the processor in step (3) calculates the two-dimensional coordinate value X of the signal light on the area array detector c , Y c is calculated according to the following formula:

[0025] X c = Σ i = 1 n ( g i - B ) u ( g i - B ) · x i Σ i = ...

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the sampling threshold B is calculated by the following formula:

[0029] B = Σ i = 1 2 ( W + H ) - 4 g i 2 ( W + H ) - 4

[0030] In the above formula, W is the number of pixels in the horizontal direction of the sampling window of the area array detector, H is the number of pixels in the vertical direct...

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Abstract

The invention relates to the technical field of light source alignment in white light communication, in particular to a feedback type light source aligning control method in the white light communication. The feedback type light aligning control method aims at solving the problem that a receiving terminal moves relative to the communication light source to prevent the communication light source from being aligned to cause higher communication error rate. The method comprises the step 1, a two-dimensional pendulum angle value of a two-dimensional pendulum mirror is set according to the position of the receiving terminal relative to the communication light source; the step 2, the communication light source is opened to enable an area array detector to receive signal light beams; the step 3, a processor can work out two-dimensional coordinate values of the signal light beams on the area array detector; the step 4, the processor can work out a two-dimensional offset angle according to the two-dimensional coordinate values; the step 5, the processor can compare the two-dimensional offset angle with the set two-dimensional pendulum angle value to carry out feedback error correction on two-dimensional offset driving voltage of piezoelectric ceramics in the two-dimensional pendulum mirror; the step 6, the step 3, the step 4 and the step 5 are repeated. The method is applied to the technical field of light source alignment in the white light communication.

Description

technical field [0001] The invention relates to the technical field of light source alignment in white light communication, in particular to a feedback control method for light source alignment. Background technique [0002] White light communication is a new direction for the development of laser communication to the field of visible light, and has attracted more and more attention in the past ten years. The communication bit error rate is related to the optical power received by the receiver, the greater the optical power, the lower the communication bit error rate. In an actual system, only when the signal light emitted by the signal light source enters the field of view of the receiver, can the receiver receive the communication optical signal and establish a communication link. However, due to the limited field of view of the receiver, when the position of the receiving end moves, the signal light may deviate from the photosensitive surface of the receiver, resulting i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116
Inventor 俞建杰韩琦琦杜继东谢小龙胥全春周彦平
Owner HARBIN INST OF TECH