Method and apparatus for peak to average power ratio reduction

一种峰值功率、功率比的技术，应用在信号处理领域，能够解决妨碍最优相位旋转值、搜索复杂度增长、数据速率损失等问题，达到良好PAPR降低水平、降低计算复杂度、节省存储空间的效果

Active Publication Date: 2016-06-08
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quantization of the phase rotation factor hampers finding the optimal phase rotation value, which limits the reduction of PAPR
Even with quantized phase rotation factors, the search complexity grows exponentially with the number of sub-blocks
Also, in some applications, side information needs to be transmitted to the receiver to recover the original data block, however this results in a loss of data rate

Method used

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  • Method and apparatus for peak to average power ratio reduction
  • Method and apparatus for peak to average power ratio reduction
  • Method and apparatus for peak to average power ratio reduction

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Embodiment Construction

[0016] Subsequently, embodiments of the present disclosure will be described with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a more complete understanding of the present invention. However, it will be apparent to those skilled in the art that the embodiments of the present disclosure may be devoid of these details. Furthermore, it should be understood that the invention is not limited to the particular embodiments as presented herein. Rather, any combination of the following features and elements, whether or not they relate to different embodiments, can be considered to implement and practice the invention. Accordingly, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be construed as elements or limitations of the appended claims unless expressly stated otherwise in the claims.

[0017] refer to figure 2 and 4 , various embodiments of the ...

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PUM

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Abstract

One of the embodiments of the present disclosure relates to a method for PARP reduction. The method comprises iteratively adjusting, based on a computed peak power value for a combined transmission signal including respective components of a plurality of frequency resource units, a phase rotation vector which is applied to said respective components of said plurality of frequency resource units to perform phase rotation on said respective components of said plurality of frequency resource units, until a newly-computed peak power value dependent upon the adjusted phase rotation vector is lower than or equal to a pre-defined peak power threshold or an iteration number reaches a pre-defined maximum value,performing phase rotation on said respective components of said plurality of frequency resource units by applying the adjusted phase rotation vector,and transmitting the combined transmission signal of said respective components of said plurality of frequency resource units phase-rotated by said adjusted phase rotation vector. The present disclosure also relates to corresponding transmitter.

Description

technical field [0001] The present disclosure relates to signal processing, and more particularly to methods and apparatus for peak-to-average power ratio (PAPR) reduction. Background technique [0002] Multi-carrier transmission has been widely used in wireless as well as wired applications due to the development of digital signal processing technology. However, one of the main drawbacks of multicarrier transmission is the high peak-to-average power ratio (PAPR) of the transmitted signal. If the peak transmit signal is limited by regulation or application constraints, the effect on high PAPR will be that the average power allowed with multi-carrier transmission is reduced relative to the average power allowed with constant power modulation techniques. This in turn results in a reduced range for multi-carrier transmission. In addition, the high PAPR also makes the power amplifier (PA) design very challenging. Specifically, to prevent intermodulation between subcarriers an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L27/28
CPCH04L27/2621H04L27/3872
Inventor 王晨杨劲松
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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