DPD (Digital Pre Distortion) self-adapting method and device based on symmetric multiprocessors

A symmetric multi-processor and self-adaptive technology, applied in the field of communication, can solve problems such as inability to adapt to multi-antenna DPD scenarios, long convergence time, slow self-adaptation rate, etc., to speed up the process of DPD self-adaptation, improve system efficiency and performance, The effect of improving execution speed

Inactive Publication Date: 2012-12-19
ZTE CORP
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Problems solved by technology

However, the software DPD adaptive method corresponding to the DSP single-core processor is still used, and the structural advantages of SMP cannot be fully utilized.
[0006] It can be seen that the existing serial DPD adaptive methods based on digital signal processors have the following defects: slow adaptive rate, long convergence time, unable to track rapid system changes, high cost, complex architecture, and unable to adapt to multi-antenna DPD Scenes

Method used

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  • DPD (Digital Pre Distortion) self-adapting method and device based on symmetric multiprocessors
  • DPD (Digital Pre Distortion) self-adapting method and device based on symmetric multiprocessors
  • DPD (Digital Pre Distortion) self-adapting method and device based on symmetric multiprocessors

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Embodiment 2

[0131] The two antennas share certain resources, mainly hardware resources. The adaptation process of the two antennas is not time-synchronized. For example, Antenna A has finished acquiring sample data and is entering into parameter estimation; while Antenna B is acquiring sample data. At this time, when the two tasks are scheduled to different processor cores of the SMP, their loads are unbalanced. In order to improve processor load balance in similar scenarios, make full use of processor capabilities, and speed up DPD self-adaptation, at the same time, large-scale, high-density key computing modules are implemented in parallel.

[0132] Step 1: Analyze the process and data processing that can be decoupled in dual-antenna DPD adaptation

[0133] Please refer to Figure 11 , Figure 11 It is a schematic diagram of the parallelization structure of two antennas and key modules according to the preferred embodiment of the present invention. At the same time, the parallelizat...

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Abstract

The invention discloses DPD (Digital Pre Distortion) self-adapting method and a device based on symmetric multiprocessors, wherein the method comprises the following steps of: carrying out correlation decoupling upon specific processing modules which meet preset decoupling conditions during a DPD self-adapting progress, obtaining a correlation decoupling result, wherein the decoupling conditions comprise a computation amount, a computation type, decoupling possibility, decoupling complexity, a decoupling risk and a decoupling efficiency speed-up ratio; carrying out parallel processing upon uncorrelated data which meets a preset correlation degree in the correlation decoupling result, obtaining parallel processing data; processing the parallel processing data by result merging, obtaining result merging data. By adopting the method and the device disclosed by the invention, load of different cores of the processors can be balanced, and synchronously, an execution speed can be improved effectively, the DPD self-adapting progress can be accelerated and convergence can be achieved, as a result, a non-linear change of a system can be preferably tracked, and efficiency and a performance of the system can be enhanced.

Description

technical field [0001] The present invention relates to the communication field, in particular to a DPD adaptive method and device based on a symmetric multiprocessor. Background technique [0002] A digital predistortion (Digital PreDisposition, DPD for short) algorithm needs to be used in a radio remote unit (Radio Remote Unit, RRU for short) to improve efficiency of a power amplifier. The realization of DPD algorithm is mainly divided into hardware logic and software parameter estimation. At present, the software implementation of the DPD algorithm is based on a digital signal processor (DSP for short) serial adaptive method, but in terms of hardware architecture, cost and efficiency, especially in multi-antenna predistortion application scenarios, based on The serial adaptive method of DSP is relatively inefficient. [0003] The DPD algorithm requires the ideal parameter estimation time to be less than one second in order to better track and adapt to the nonlinear chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49
Inventor 史晓飞苟春茂邹加勇刘奇
Owner ZTE CORP
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