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Visible light communication system and method based on probabilistic shaping coding, and application equipment

A visible light communication and probability technology, applied in multi-frequency code systems, transmission systems, short-range systems, etc., can solve the problems of effective bandwidth adjustment of difficult systems, complex algorithms, etc., and achieve great practical value, low complexity, and flexible adjustment. Effect

Active Publication Date: 2018-05-29
WUHAN POST & TELECOMM RES INST CO LTD
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AI Technical Summary

Problems solved by technology

This method can keep the bit error rate at the expected level, but due to the need for frequent channel estimation, full optimization will make the algorithm very complex, and it is difficult to conveniently adjust the effective bandwidth of the system

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  • Visible light communication system and method based on probabilistic shaping coding, and application equipment
  • Visible light communication system and method based on probabilistic shaping coding, and application equipment

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0038] Such as figure 1 As shown, the visible light communication system based on probabilistic shaping coding in the present invention includes a transmitting end 1 and a receiving end 2 .

[0039] The sending end 1 includes a probability mapping module 11 , an FEC (Forward Error Correction, forward error correction) coding module 12 and an OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) framing module 13 . The probability mapping module 11 is used to group the bits of the input data and map them into new bits according to the set probability. The FEC coding module 12 is used to perform forward error correction coding on the data from the probability mapping module 11 . The OFDM framing module 13 is used to form the FEC coded data into an OFDM frame.

[0040] The receiving end 2 includes a prob...

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Abstract

The invention relates to a visible light communication system and method based on probabilistic shaping coding, and application equipment, and relates to the field of light communication systems. Bitsof input data are grouped at a sending end, and mapped into new bits according to the set probability; then, forward error correction coding is carried out; the coded data forms an OFDM frame; then,a data flow is formed and sent; and a receiving end receives the data flow from the sending end, recovers the OFDM frame, performs inverse mapping on the decoded data after performing OFDM frame decoding and forward error correction decoding, and recovers the original data bits by using a probability mapping rule corresponding to the sending end. Due to addition of probability mapping, the net information rate of the system can be adjusted; the communication capability of the system can be increased; adjustment is carried out flexibly; and furthermore, the complexity is relatively low.

Description

technical field [0001] The present invention relates to the field of optical communication systems, in particular to a visible light communication system, method and application equipment based on probability shaping coding. Background technique [0002] Visible light communication is a wireless transmission technology that uses high-speed bright and dark flashing signals emitted by light-emitting diodes for data transmission. Due to the use of high-efficiency and energy-saving LEDs as the light source, communication can be performed in the range where the light can be directly illuminated. At the same time, it has the advantages of energy saving, safety, and wide available spectrum. It is a communication technology with great application prospects. [0003] In the existing visible light communication system, the light source is LED for lighting, and the channel fading is large during space transmission. After various channel equalization, the actual usable bandwidth is only...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04L1/00H04L27/26
Inventor 刘武杨超杨奇
Owner WUHAN POST & TELECOMM RES INST CO LTD
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