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Dynamic peak clipping method and device and digital predistortion processing system

A peak clipping and dynamic technology, applied in the direction of synchronization/start-stop system, etc., can solve problems such as DPD overflow and affect communication quality, and achieve the effect of preventing spectrum overflow and improving communication quality.

Active Publication Date: 2016-09-07
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology

[0004] Based on this, it is necessary to provide a dynamic peak-shaving method and device capable of effectively stabilizing the peak-to-average ratio, including The digital pre-distortion processing system of the dynamic peak clipping

Method used

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  • Dynamic peak clipping method and device and digital predistortion processing system
  • Dynamic peak clipping method and device and digital predistortion processing system
  • Dynamic peak clipping method and device and digital predistortion processing system

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Embodiment Construction

[0024] Such as figure 1 Shown, a kind of dynamic peak clipping method comprises steps:

[0025] Step S110, counting the signal power value of the communication signal within the predetermined time; in this embodiment, the communication signal can be collected and counted through the power statistics module to obtain the signal power value within the predetermined time, preferably 10 ms within the predetermined time .

[0026] Step S120, according to the corresponding relationship between the communication signal power value and the peak clipping threshold value obtained in the pre-test, determine the peak clipping threshold value that matches the signal power value of the statistical communication signal; in this embodiment, it can be based on the power statistics The corresponding peak clipping threshold value is selected according to the power level of the module statistics, and the peak clipping threshold value is sent to the functional module that can perform peak detecti...

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Abstract

The invention discloses a method and a device for dynamic peak clipping. The method is characterized in that a peak clipping threshold value which is matched with a calculated signal power value of a communication signal can be determined by calculating the signal power value of the communication signal within a preset time and according to a corresponding relation, which is obtained by pre-testing, of the communication signal power value and the peak clipping threshold value, a peak value of the communication signal, which is larger than the peak clipping threshold value, can be removed by detecting the peak value of the communication signal in real time and according to a peak clipping pulse generated by the peak clipping threshold value, and thus a peak-to-average ratio of the communication signal is ensured to be in a preset fixed range. The invention also discloses a DPD (Digital Pre-Distortion) processing system, the peak-to-average ratio of the communication signal is enabled to be in the preset fixed range through a dynamic peak clipping device, thus the inter-modulation fluctuation of DPD (Digital Pre-Distortion) in the preset range can be ensured, the frequency spectrum overflow of the DPD under the situation that the peak-to-average ratio changes quickly can be prevented from happening, and the communication quality is increased.

Description

technical field [0001] The invention relates to the field of communication information processing, in particular to a dynamic peak clipping method and device and a digital pre-distortion processing system. Background technique [0002] In the communication system, the non-linear distortion problem caused by the power amplifier has attracted more and more attention, especially the modern communication technology is multi-carrier communication signal communication, which increases the peak-to-average ratio of the communication signal, and the peak-to-average ratio means The power fluctuation range of the communication signal is very large. When the input communication signal is very large, it is easy to cause the power amplifier to enter the saturation region or the cut-off region, resulting in serious nonlinear distortion. Linearity, this method is simple to implement but high in cost and low in efficiency, and it is not enough to completely rely on back-off power in occasion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/49
Inventor 唐永军刘志
Owner COMBA TELECOM SYST CHINA LTD
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