Peak clipping structure and peak clipping method based on slip window peak detection

A peak detection and sliding window technology, applied in the field of signal processing, can solve problems such as peak clipping, achieve the effect of improving stability, simple architecture implementation, and improving EVM

Active Publication Date: 2013-04-10
WUHAN POST & TELECOMM RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional peak cancellation method deals with all the maximum values, and to some extent, there will still be the problem of over clipping.

Method used

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  • Peak clipping structure and peak clipping method based on slip window peak detection
  • Peak clipping structure and peak clipping method based on slip window peak detection
  • Peak clipping structure and peak clipping method based on slip window peak detection

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Embodiment Construction

[0021] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] The present invention can adopt a multi-level peak-cutting structure based on sliding window peak detection, and the peak-cutting structure of each level is exactly the same. Such as figure 2 As shown, each level of peak clipping structure is mainly composed of the following modules: amplitude and phase generation module, sine and cosine lookup table module, sliding window peak detection module, peak clipping unit (Cannel Plus Generator, CPG) distribution and multiplexing module, Peak clipping noise generation module, filter coefficient storage module, noise filtering module, peak clipping output module, intermediate frequency data input amplitude and phase generation module, amplitude and phase generation module are connected with sine and cosine lookup table module and sliding window peak detection module respectively, peak clipping...

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Abstract

The invention relates to a peak clipping structure and a peak clipping method based on slip window peak detection. In the structure, the peak clipping structure with the completely same multi-stage structure is used, and the peak clipping structure at each stage is connected with the peak clipping structure at the adjacent stage in a direct cascaded mode. In the method, the peak clipping structure with the completely same multi-stage structure is used, low peal average ratio intermediate frequency data are directly input to a magnitude phase generation module of the second-stage peak structure, and by parity of reasoning, the process is completed until the data are input to the last-stage peak clipping structure. The peak clipping structure and peak clipping method are simply achieved andhas strong applicability, resources are less occupied, the over-peak clipping problem can be well solved, and the error vector magnitude (EVM) is improved.

Description

technical field [0001] The present invention relates to an important signal processing technology in a digital communication system, peak clipping technology; in particular to a peak clipping structure and a peak clipping method based on sliding window peak detection Background technique [0002] In a modern mobile communication system, the application of multi-user and multi-carrier technologies will cause a peak average ratio (Peak Average Ratio, PAR) problem. On the one hand, the peak-to-average ratio will directly cause the back-off of the power amplifier at the peak value, directly affecting the efficiency of the power amplifier; on the other hand, the peak-to-average ratio will directly affect the performance of digital pre-distortion (Digital Pre-Distortion, DPD), thereby affecting the linearization. Therefore, in order to improve the efficiency of the power amplifier, peak clipping technology is particularly necessary. [0003] At present, the more common peak-shav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 曹雨杜仲周世军江浩洋陈付齐
Owner WUHAN POST & TELECOMM RES INST CO LTD
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