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Polarization code optimization design method in four-color visible light communication system

A visible light communication and optimized design technology, applied in the field of visible light communication, can solve problems affecting polar code performance, symbol interference, and polar code performance deterioration, achieving high degrees of freedom, meeting lighting requirements, and improving transmission rates.

Active Publication Date: 2017-03-15
SOUTHEAST UNIV
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Problems solved by technology

[0004] However, for the RGBA four-color optical signal, although the noise power is the same on each channel, the signal power is related to the light source spectrum and filter, and at the same time, there are symbol interferences from other optical channels on each channel
Therefore, there are actually large differences between the environments of the four-color optical channels, and such an obviously very uneven channel has a great impact on the application of polar codes in VLC systems. The main point is: the polarization of polar codes Due to the different channel environment, the "good" channel for the traditional polar code has become a "bad" channel in the VLC system. At this time, the original polar code structure is used for encoding and transmission. , it will greatly affect the performance of the polar code, making the performance of the polar code greatly deteriorated

Method used

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  • Polarization code optimization design method in four-color visible light communication system
  • Polarization code optimization design method in four-color visible light communication system
  • Polarization code optimization design method in four-color visible light communication system

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Embodiment Construction

[0042] The polar code optimization design method of this embodiment includes the following steps:

[0043] S1. Calculate and obtain the initial polarization parameters of the four-color channel according to the set channel model of the four-color visible light communication system and the initial design signal-to-noise ratio.

[0044]This step specifically includes: S11. Set the RGBA four-color channel model of the four-color visible light communication system as y=Hs+n, where y represents the received signal, s represents the transmitted signal, n represents noise, and H represents the channel impact of the four-color channel response, and where h ij Indicates the channel gain from the transmitter of color j to the receiver of color i, i,j=R,G,B,A. S12. Calculate the average power P according to the channel impulse response H, where, S13, according to the average power P and the initial design signal-to-noise ratio set as SNR 0 Calculate the variance σ of the noise n 2...

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Abstract

The invention discloses a polarization code optimization design method in a four-color visible light communication system. The target of optimization design is to maximize the advantages of channel polarization in the specified four-color visible light communication system. The essence is that the four-color visible light communication system is deemed as four paths of channels, quantitative reliability racking is performed on the polarized channels again according to the influence of the difference of signal to noise ratios of the four paths of channels to the channel polarization, and the channel having the highest reliability is selected as an information bit, so that the performance of the polarization code in the four-color visible light communication system is optimized.

Description

technical field [0001] The invention relates to the technical field of visible light communication, and mainly relates to the application of polar codes in a four-color visible light communication system and an optimization design method thereof. Background technique [0002] Visible light communication (VLC) has become one of the most promising technologies in indoor wireless communication due to its inherent advantages such as high speed, high security, rich spectrum, and no electromagnetic interference. Multicolor LEDs are promising transmitters in VLC systems due to their high modulation bandwidth. Among them, the red, green, blue and yellow four-color synthesis scheme (RGBA-LED) has one more yellow light than the red, green and blue three-color synthesis scheme (RGB-LED). On the one hand, it can improve the quality and purity of the synthesized white light; The yellow light band can also improve communication speed and quality. In order to synthesize white light that ...

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Application Information

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IPC IPC(8): H04B10/116H04B10/532H04L1/00
CPCH03M13/13H04B10/116H04B10/532H04L1/0009
Inventor 姜明朱秋瑜赵春明
Owner SOUTHEAST UNIV
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