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Method and apparatus for processing clipped wave

A processing method and technology of processing equipment, applied in the field of communication, can solve the problems of unfavorable receiving equipment processing, complex implementation, time extension, etc., and achieve the effects of reducing peak-to-average ratio, improving output power and efficiency, and saving system resources

Active Publication Date: 2007-11-21
HUAWEI TECH CO LTD
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Problems solved by technology

This method will not affect the original spectrum characteristics, and can also reduce PAR, but the disadvantage is that the delay is long, the implementation is complicated, and multiple optimizations are required. At the same time, under different time slots and different numbers of code channels, The phase of each carrier needs to be readjusted, which is not conducive to the processing of the receiving device

Method used

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  • Method and apparatus for processing clipped wave
  • Method and apparatus for processing clipped wave
  • Method and apparatus for processing clipped wave

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Embodiment Construction

[0023] The embodiments of the present invention will be further described below in conjunction with the drawings and examples.

[0024] In Embodiment 1 of the present invention, a system structure diagram of a signal clipping method is shown in Figure 1. Taking the existence of three carrier signals in the signal as an example, it mainly includes two steps of carrier combining processing and clipping noise generation. , and the multi-carrier signal processing method is the same as described in the following steps.

[0025] Specifically, the signal carrier combination processing process includes the following steps:

[0026] Shaping filtering: This process can be completed in the Shape Filtering (shaping filtering) module shown in Figure 1. The purpose is to convert the data to be sent into a signal suitable for channel transmission and reduce intersymbol interference.

[0027] Variable rate processing: This process can be completed in the upsampling (Upsampling) module shown ...

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Abstract

The method comprises: detecting the s peak point signal which is over the preset threshold; according to said peak point signal over the preset threshold and the threshold, generating a clipping noise; according to the clipping noise, making clipping process. The invention also reveals a signal clipping treatment apparatus comprising a peak point detecting module and a clipping treatment module.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a signal clipping processing method and device in a communication system. Background technique [0002] In a traditional wireless communication system, a base station uses a power amplifier to communicate with user terminals distributed within a predetermined service area. Especially in CDMA (CDMA Code Division Multiple Access, Code Division Multiple Access) / WCDMA (Wireless CDMA, Wireless CDMA) / OFDM (Orthogonal Frequency Division Multiplex, Orthogonal Frequency Division Multiplexing) system, the downlink signal Usually it is a synthesis of multiple user signals. The synthetic envelope of this signal will lead to a high PAR (PeakAverage Rate, peak-to-average ratio) of the final signal, especially for multi-carrier WCDMA / CDMA / OFDM signals. High PAR will strictly limit the linearity requirements of the power amplifier, causing the power amplifier used by the base sta...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2623
Inventor 安德烈・伏罗比耶夫伊果・潘可夫
Owner HUAWEI TECH CO LTD
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