Method for reducing FBMC-OQAM system peak-to-average power ratio based on peak tracking feedback

A peak-to-average power ratio and peak-to-peak technology, which is applied in the field of reducing the peak-to-average power ratio of FBMC-OQAM systems based on peak tracking feedback, to achieve the effects of simplifying calculation complexity, improving communication quality, and improving performance

Active Publication Date: 2017-05-31
CENT SOUTH UNIV
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Problems solved by technology

[0006] The technical problem solved by the present invention is to reduce the peak-to-average power ratio of the FBMC-OQAM system, and a peak tracking feedback method is proposed to process the hig

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  • Method for reducing FBMC-OQAM system peak-to-average power ratio based on peak tracking feedback
  • Method for reducing FBMC-OQAM system peak-to-average power ratio based on peak tracking feedback
  • Method for reducing FBMC-OQAM system peak-to-average power ratio based on peak tracking feedback

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[0023] The specific implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0024] The present invention provides a method for peak tracking feedback to reduce the peak-to-average power ratio of the FBMC-OQAM system, the specific process is as follows image 3 , including the following steps:

[0025] S1, sub-carriers are divided into V groups in advance, FBMC symbols are carried out OQAM modulation, the real number part and the imaginary number part of the complex number symbol are processed separately, and its imaginary part is delayed T / 2 relative to the real part (T is a FBMC symbol period), and then The real and imaginary partial block signals are sequentially subjected to inverse fast Fourier transform (IFFT) and polyphase filter (PPN) modulation to obtain time domain transmission signals;

[0026] S2. Set the value I of the number of iterations. Since the occurrence ...

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Abstract

The invention discloses a method for reducing an FBMC-OQAM system peak-to-average power ratio based on peak tracking feedback. The method comprises the following steps: 1) pre-grouping sub-carriers for carrying FBMC symbols, successively executing inverse Fourier transform and multi-phase filter modulation to real part and virtual part partitioning signals, to obtain a time domain sending signal; 2) circularly detecting the position point located by the maximum peak of the time domain signal, and executing the phase rotation to the data at the corresponding position point of the partitioning signal; 3) finding out a group of the optimal phase factor combination to multiply by the data at the selected position point, and enabling the sum to be minimum, namely reducing the peak at the position; and 4) using the data with the optimized phase to replace the original signal to generate new time domain signal. The method is capable of reducing the peak-to-average power ratio through a peak tracking feedback algorithm, enabling a power amplifier at the sending terminal to be positioned in the linear state, and improving the communication quality without the transmission signal distortion. Compared with the traditional method, the method has the lower computation complexity and the better effect of reducing the peak-to-average power ratio.

Description

technical field [0001] The invention relates to the technical field of 5G communication, in particular to a method for reducing the peak-to-average power ratio of an FBMC-OQAM system based on peak tracking feedback. Background technique [0002] 5G is a new generation of mobile communication system developed for the needs of mobile communication after 2020. It will integrate with the Internet of Things, Industrial Internet, and Internet of Vehicles, bringing massive access and extremely fast speed requirements, and triggering an explosion in network pipeline traffic. increase. Its ultra-high spectrum utilization and energy efficiency are an order of magnitude or higher than 4G systems in terms of transmission rate and delay. From the perspective of wireless transmission, the 5G scenario puts forward more stringent requirements for multi-carrier multiple access transmission technology: First, due to the large-scale and irregular nature of machine-to-machine communication (M2...

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Application Information

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IPC IPC(8): H04L27/34H04L27/26
Inventor 邓宏贵任霜刘岩钱学文
Owner CENT SOUTH UNIV
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