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Method, apparatus and transmitter for restraining signal peak-equal power ratio

A technology of average power and signal peak, applied in a method of suppressing signal peak-to-average power ratio, devices and transmitters, can solve problems such as the impact of system demodulation performance, and achieve a good PAPR reduction effect

Active Publication Date: 2009-08-19
HUAWEI TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the solutions in the prior art will have a greater impact on the demodulation performance of the system

Method used

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  • Method, apparatus and transmitter for restraining signal peak-equal power ratio
  • Method, apparatus and transmitter for restraining signal peak-equal power ratio
  • Method, apparatus and transmitter for restraining signal peak-equal power ratio

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Embodiment Construction

[0024] The embodiments of the present invention provide a method, device and transmitter for suppressing signal peak-to-average power ratio, which can obtain a relatively good PAPR reduction effect, and does not have much impact on the average power and demodulation performance of the system. In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] Such as figure 1 As shown, the first embodiment of the present invention relates to a method for suppressing signal peak-to-average power ratio, including the steps:

[0026] S101: After performing multipath delay on the input signal, output at least two signals with different delays;

[0027] Taking the input signal as an OFDM signal as an example, the delay time of each signal starts from 0 and increases by a certain step length to a CP (Cyclic Prefix) length. The ...

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Abstract

The embodiment of the invention discloses a method for inhibiting a peak to average power ratio of a signal, a device thereof and a transmitter, wherein the method for inhibiting the peak to average power ratio of the signal comprises the following steps: after multi-path time delay is conducted to a input signal, signals of at least two paths with different delay times are output; the signals of at least two paths with different delay times in the output signals are superimposed; the PAPR values of the superimposed signals are respectively detected to determine a signal combination corresponding to the superimposed signal with the lowest PAPR value or with PAPR value smaller than a preset PAPAR threshold value; and signals in the signal combination are output after being superimposed and normalized. By simulating multi-path, the method can obtain relatively good PAPR lowering effect without greatly affecting the average power and demodulating performance of a system.

Description

Technical field [0001] The present invention relates to the field of communication technology, and in particular to a method, device and transmitter for suppressing signal peak-to-average power ratio. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) is a communication method that transmits data on multiple carriers at the same time. The sub-carriers are orthogonal to each other, allowing the spectrum of the sub-channels to overlap each other, so it can maximize The use of spectrum resources; the use of IFFT (Inverse Fast Fourier Transform, Inverse Fast Fourier Transform) and FFT (Fast Fourier Transform, Fast Fourier Transform) can achieve fast modulation and demodulation; using CP (Cyclic Prefix, cyclic prefix) The method can eliminate the influence of ISI (InterSymbol Interference). Compared with the traditional single-carrier modulation method, OFDM has the advantages of anti-multipath delay, simple equa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 武杰陈龙孙德福唐友喜
Owner HUAWEI TECH CO LTD
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