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Peak-to-Average Power Ratio Suppression Method Based on Cyclic Shift Selective Mapping

A technology of peak-to-average power ratio and cyclic displacement, applied in the direction of modulated carrier system, digital transmission system, electrical components, etc., can solve the problems of high system performance requirements, high computational complexity, and reduced data transmission efficiency, so as to reduce complexity degree, avoiding signal distortion, and improving efficiency

Active Publication Date: 2021-01-26
ZHONGTIAN BROADBAND TECH +1
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The calculation complexity of this method is relatively high, the system performance is very high, and the data transmission efficiency is reduced.

Method used

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  • Peak-to-Average Power Ratio Suppression Method Based on Cyclic Shift Selective Mapping
  • Peak-to-Average Power Ratio Suppression Method Based on Cyclic Shift Selective Mapping
  • Peak-to-Average Power Ratio Suppression Method Based on Cyclic Shift Selective Mapping

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Embodiment Construction

[0033] The present invention will be described in further detail below through examples, and the following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0034] Such as figure 1 As shown, a method for suppressing peak-to-average power ratio based on cyclic displacement selective mapping of the present invention comprises the following steps:

[0035] Step 1: Block the binary bits to be sent according to the OFDM symbol length, and copy each data block into multiple copies of the same binary sequence after the block.

[0036] The original binary data to be transmitted is divided into blocks corresponding to the OFDM symbol length and the number of bits of a constellation symbol in the modulation format. The length of the binary data block is:

[0037] L B = K·N dc

[0038] Among them, K is the number of bits carried by each symbol in the corresponding modulation format, N dc It indicates the number ...

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Abstract

The invention discloses a peak-to-average power ratio suppression method based on cyclic shift selective mapping, which comprises the following steps: partitioning binary bits to be sent according tothe length of OFDM symbols, and copying each data block into a plurality of same binary sequences after partitioning; generating a random mutual exclusion displacement value S; performing cyclic shifton each data block, and shifting S at the tail part of the data block to the initial position of the data block to form a new data block; and calculating a PAPR value in each data IFFT result in thenew data block, and selecting the data with the minimum PAPR to send. According to the method, the calculation complexity is greatly reduced, and the data transmission efficiency is improved.

Description

technical field [0001] The invention relates to a peak-to-average power ratio suppression method, in particular to a peak-to-average power ratio suppression method based on cyclic displacement selective mapping. Background technique [0002] Intensity Modulation Direct Detection (IM / DD) Orthogonal Frequency Division Multiplexing (OFDM) is a fiber optic transmission technology based on OFDM technology. The introduction of OFDM technology into the optical fiber transmission system has the advantages of anti-dispersion, high spectral efficiency, and fine-grained adaptive modulation. However, the defect of high peak-to-average power ratio (PAPR) inherent in OFDM is also introduced into the IM / DD-OFDM system. Traditional methods for suppressing peak-to-average power ratio (PAPR) are mainly divided into coding, predistortion and probability. The encoding method uses multiple spare code groups to encode the same data block, calculates the PAPR values ​​of different code groups, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2614
Inventor 高明义陈潇逸揭水平王寅陆天宇房洪莲李韬沈纲祥
Owner ZHONGTIAN BROADBAND TECH
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