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Digital peak clipping method and digital peak clipping device

A digital and coefficient technology, which is applied in the field of digital peak clipping methods and devices, can solve the problems of ineffective reduction of PAPR, increased probability of peak miss cancellation, peak miss cancellation, etc., to reduce the probability of peak miss cancellation, eliminate peak, The effect of reducing PAPR

Active Publication Date: 2013-03-27
HONOR DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventors have found that the prior art has at least the following problems: the existing PC-CFR technology can effectively reduce PAPR for small-bandwidth, low-rate communication systems, but for the large bandwidth after the introduction of CA , For high-speed LTE-A communication systems, PC-CFR technology has the situation of peak omission, which cannot effectively reduce PAPR, which increases the probability of peak omission

Method used

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  • Digital peak clipping method and digital peak clipping device
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  • Digital peak clipping method and digital peak clipping device

Examples

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Embodiment 1

[0029] refer to figure 1 , figure 1 It is a flowchart of an embodiment of a digital peak clipping method provided in Embodiment 1 of the present invention; the digital peak clipping method includes:

[0030] S101: Generate an output noise signal according to the amplitude value of the carrier aggregation CA signal and a preset peak clipping threshold.

[0031] In this step, the amplitude value |x(n)| of the CA signal is compared with the preset peak clipping threshold A to obtain the output noise signal; the peak clipping threshold A is the maximum amplitude allowed by the clipping signal, which is determined by LTE-A The communication system is preset.

[0032] S102: Obtain frequency point, bandwidth and sampling rate of each first carrier signal in the CA signal.

[0033] In this step, the frequency point, bandwidth and sampling rate of each first carrier signal in the CA signal are obtained from the carrier aggregation configuration information of the CA signal.

[0034...

Embodiment 2

[0063] refer to figure 2 , figure 2 It is a flowchart of an embodiment of a digital peak-shaving method provided in Embodiment 2 of the present invention; the digital peak-shaving method includes:

[0064] S201: Generate an output noise signal according to the amplitude value of the carrier aggregation CA signal and a preset peak clipping threshold.

[0065] In practical applications, calculate the amplitude value |x(n)| corresponding to the CA signal x(n), compare the amplitude value |x(n)| of the CA signal with the preset peak clipping threshold A, and obtain the output noise signal noise(n);

[0066] Wherein, the calculation formula of the output noise signal noise(n) is as follows:

[0067] noise ( n ) = 0 , | x ( n ...

Embodiment 3

[0123] refer to Image 6 , Image 6 It is a schematic diagram of the first structure of a digital peak-shaving device embodiment provided in Embodiment 3 of the present invention; the digital peak-shaving device includes:

[0124] The output noise generation module 601 is configured to generate an output noise signal according to the amplitude value of the carrier aggregation CA signal and a preset peak clipping threshold.

[0125] The obtaining module 602 is configured to obtain the frequency point, bandwidth and sampling rate of each first carrier signal in the CA signal.

[0126] A noise shaping module 603, configured to generate a CA peak clipping coefficient according to the frequency point, bandwidth, and sampling rate of each first carrier signal, and perform filtering processing on the CA peak clipping coefficient and the output noise signal to generate filter-shaped noise Signal.

[0127] The peak clipping signal generating module 604 is configured to align and sub...

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Abstract

The invention discloses a digital peak clipping method and a digital peak clipping device, and belongs to the field of communication. The digital peak clipping method includes generating output noise signals according to amplitude values of carrier aggregation (CA) signals and a preset peak clipping threshold; acquiring frequency points, bandwidths and sampling rates of various first carrier signals in the CA signals; generating CA peak clipping coefficients according to the frequency points, the bandwidths and the sampling rates of the various first carrier signals and actuating filter processing for the CA peak clipping coefficients and the output noise signals to generate filtered and formed noise signals; and aligning the CA signals with the filtered and formed noise signals after the CA signals are delayed, and subtracting the filtered and formed noise signals from the delayed CA signals to generate peak clipping signals. The digital peak clipping method and the digital peak clipping device have the advantage of capability of reducing the peak clipping missing probability.

Description

technical field [0001] The invention relates to the communication field, in particular to a digital peak clipping method and device. Background technique [0002] LTE-A (Long Term Evolution-Advanced, Advanced Long Term Evolution) is a further evolution and enhanced system of the 36PP LTE (3rd Generation Partnership Project Long Term Evolution, 3rd Generation Partnership Project Long Term Evolution) system. In the LTE-A system, in order to meet the peak data rate requirements of the International Telecommunication Union for the fourth-generation communication technology, CA (Carrier Aggregation, Carrier Aggregation) technology, also known as spectrum aggregation technology or bandwidth expansion technology, is introduced; CA technology uses aggregation Multiple LTE carriers are expanded into transmission carriers of the LTE-A system to obtain wider transmission bandwidth. However, the CA technology has a relatively large PAPR (Peak to Average Power Ratio, peak-to-average pow...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/03
Inventor 熊军
Owner HONOR DEVICE CO LTD
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