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Peak-to-average ratio reduction method and device for visible light communication OFDM system

A visible light communication, peak-to-average ratio technology, applied in the field of optical communication, can solve the problem of high PAPR

Inactive Publication Date: 2021-03-26
CHONGQING UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and device for reducing the peak-to-average ratio of the OFDM system of visible light communication, which is used to solve the problem of excessively high PAPR in the existing system

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  • Peak-to-average ratio reduction method and device for visible light communication OFDM system
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  • Peak-to-average ratio reduction method and device for visible light communication OFDM system

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Embodiment Construction

[0058] In this patent, the specific implementation manner will be further described below in conjunction with the accompanying drawings and embodiments.

[0059] Such as figure 2 As shown, the embodiment of the present invention provides a method for reducing the peak-to-average ratio of the visible light communication OFDM system, the method comprising:

[0060] Step S11. Randomly generate one or more sets of first information bit sequences, and preset frozen bits in the first information bit sequences to zero.

[0061] It should be noted that the number of bits of the first information bit sequence is equal to the sum of the number of preset information bits and the number of preset correction bits

[0062] Step S12, according to the one or more groups of first information bit sequences, generate the time-domain OFDM symbols of each bit in each group of first information bit sequences, and calculate the time-domain OFDM symbols of each bit according to the time-domain OFDM...

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Abstract

The invention provides a peak-to-average power ratio reduction method and device for a visible light communication OFDM system, and the method comprises the steps: randomly generating one or more groups of first information bit sequences, and calculating the PAPR of an OFDM symbol of each bit in each group of first information bit sequences according to the one or more groups of first informationbit sequences; flipping each bit in each group of first information bit sequences, and calculating the PAPR of the time domain OFDM symbol of each flipped bit; calculating a metric value of each bit in each group of first information bit sequences according to the PAPR before overturning and the PAPR after overturning; determining a correction bit according to the metric value; generating a plurality of groups of third information bit sequences according to the second information bit sequences and 0 or 1 inserted into the correction bits through polarization coding, and calculating the PAPR ofthe time domain OFDM symbol of each group of third information bit sequences; and selecting a time domain OFDM symbol of a group of third information bit sequences with the lowest PAPR as a sending end output signal. According to the invention, the problem that the PAPR in the existing system is too high is solved.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a method and device for reducing the peak-to-average ratio of an OFDM system for visible light communication. Background technique [0002] Traditional radio frequency communication technology with limited spectrum resources has been difficult to meet the bandwidth requirements of future wireless networks. Visible light communication technology has the advantages of high security, wide spectrum range, low carbon environmental protection, high efficiency and energy saving, and can be used in subways, high-speed rails, Provide ultra-broadband cable-free information interaction and daily lighting in special areas such as hospitals, engine rooms, road lights, nuclear power plants, and underground operations. It can also provide green, ubiquitous, and cheap access means for the deep coverage of indoor and outdoor 5G mobile communication networks in the future; Fo...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B10/116
CPCH04L27/2614H04B10/116
Inventor 曹阳罗超彭小峰
Owner CHONGQING UNIV OF TECH
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