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A communication method, device and computer storage medium

A communication method and communication device technology, applied in the field of communication, can solve the problems of signal quality deterioration, signal distortion, DC offset, etc.

Active Publication Date: 2020-10-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current VLC receiving device usually uses an alternating current (AC) coupling device to receive the PAM signal, which will cause a DC offset phenomenon, which will distort the received continuous equal-amplitude signal or introduce bit errors. , and thus lead to the deterioration of the signal quality received by the receiving device

Method used

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  • A communication method, device and computer storage medium
  • A communication method, device and computer storage medium
  • A communication method, device and computer storage medium

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Embodiment Construction

[0085] Embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.

[0086] Such as figure 1 Shown is a schematic diagram of an application scenario of an embodiment of the present invention. It should be understood that the method and device provided by the embodiment of the present invention can be applied to all communication systems using the PAM technology. The embodiment of the present invention uses a visible light communication system as an example, which is not intended to limit the application scenarios of the embodiment of the present invention. Such as figure 1 As shown, in the visible light communication system, the sending device may be a VLC transmitter, more specifically, a plurality of LED lamps installed with a VLC module; the receiving device may be a VLC receiver, more specifically, an AC-coupled photodetector. In addition to the visible light communication system, the communicat...

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Abstract

Provided in an embodiment of the present invention are a communication method and device. The method comprises: determining, according to running disparities of pulse-amplitude modulation (PAM) codewords in a codebook that correspond to inputted data, a PAM codeword to be outputted, wherein any PAM codeword in the codebook comprises j k-order PAM symbols, the inputted data comprises i bits, and all PAM codewords in the codebook satisfy the following conditions: an absolute value of the running disparity of the codeword is less than a threshold m, a maximum run length of the codeword is less than a threshold n, each of i, j and k is a positive integer, and n satisfies n ≤ [ j / 2 ] + 1. The embodiment of the present invention ensures a favorable transfer rate while increasing quality of a signal received by a receiving device.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a communication method and device. Background technique [0002] Due to the increasing use of mobile terminals, especially people's demand for "anywhere, anytime" (anywhere, anytime) high-speed data services, the already tight spectrum resources are even tighter, so new communication technologies need to be adopted Expand wireless spectrum resources. [0003] As a new communication method, visible light communication (visible light communication, VLC) has the characteristics of high-speed potential, large communication bandwidth, and extensive spectrum resources. Light emitting diodes (light emitting diodes, LEDs) used for indoor lighting generally have a working power greater than 10W, which makes indoor communication have a high signal-to-noise ratio and provides a good guarantee for its high-speed, low-error communication. At present, the experimental rate o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/116H04B10/54H04B10/60
CPCH04B10/116H04B10/54H04B10/60
Inventor 罗鹏飞
Owner HUAWEI TECH CO LTD