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Visible light communication system based on polarization code and implementation method thereof

A technology for visible light communication and an implementation method, applied in the field of visible light communication systems, can solve the problems of complex iterative message propagation decoding algorithms of LDPC codes and cannot reach the Shannon limit, etc., and achieve physical layer security, high coding efficiency, and coding and decoding. simple structure

Pending Publication Date: 2017-05-31
JINAN UNIVERSITY
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Problems solved by technology

[0005] (1) LDPC code is a block error-correcting code with a sparse parity check matrix, its performance is close to the Shannon limit, but not up to the Shannon limit
[0006] (2) The iterative message propagation decoding algorithm of LDPC code is complex

Method used

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  • Visible light communication system based on polarization code and implementation method thereof
  • Visible light communication system based on polarization code and implementation method thereof
  • Visible light communication system based on polarization code and implementation method thereof

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Embodiment

[0051] Such as figure 1 As shown, a polar code-based visible light communication system of the present invention includes a transmitting subsystem S11 that transmits visible light signals and a receiving subsystem S12 that receives visible light and converts the visible light into electrical signals. After the transmitting subsystem S11 realizes the channel coding and modulation of the input signal, it outputs a continuous modulation waveform, drives the LED light source to emit light and transmits the signal; the receiving module S12 realizes the conversion of the optical signal received by the photodetector element into the incident energy The proportional photocurrent, the photocurrent is conditioned by the conditioning circuit into a signal suitable for the digital demodulator circuit, and then input into the digital demodulator, demodulated by the digital demodulator and decoded by the channel decoder, and finally recovered the information.

[0052] The transmitting subsystem...

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Abstract

The invention discloses a visible light communication system based on a polarization code and an implementation method thereof. The system comprises a transmitting subsystem used for transmitting a visible light signal and a receiving subsystem used for receiving the visible light signal, the transmitting subsystem performs polarization code error correction encoding and OOK modulation on an input signal, outputs continuous modulation waveforms, drives an LED light source to emit light and transmits the signal; the receiving subsystem converts the light signal received by a photoelectric detection element into light current in proportional incident energy, the light current is conditioned by a conditioning circuit into a signal suitable for a digital demodulator circuit, the signal is input to a digital demodulator, and the information is finally restored by means of the demodulation of the digital demodulator and polarization code error correction decoding; the visible light communication system disclosed by the invention is based on the polarization code encoding and decoding method, the encoding and decoding structure is simple, and the complexity is low; and in addition, the visible light communication system disclosed by the invention supports an adaptive dimming ratio, has a limited run length and satisfies the illuminating requirements of uniform illumination without flicking, and no additional encoding balance and circuit encoding technology needs to be increased.

Description

Technical field [0001] The present invention relates to the field of optical communication, in particular to a visible light communication system based on polarization codes and an implementation method thereof. Background technique [0002] Visible Light Communication (VLC) has the advantage that it can be used for both lighting and communication. With the wide application of LEDs in various fields such as lighting, communication and sensing technology, it is considered to be a technology with great development potential and application prospects. . Compared with the existing radio frequency communication technology, visible light communication has gradually become a hot spot technology for indoor / outdoor short-distance communication due to its advantages of green and high energy efficiency, immunity to electromagnetic interference, rich spectrum resources and high confidentiality. [0003] A typical visible light communication system includes a transmitting subsystem and a recei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04L1/00
CPCH04B10/116H04L1/0056
Inventor 方俊彬车振蒋琳余小龙陈哲
Owner JINAN UNIVERSITY
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