DPD adaptive method and device based on symmetric multiprocessor

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

Inactive Publication Date: 2017-09-29
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 adaptive method and device based on symmetric multiprocessor
  • DPD adaptive method and device based on symmetric multiprocessor
  • DPD adaptive method and device based on symmetric multiprocessor

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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 a DPD adaptive method and device based on a symmetric multiprocessor. Among them, the method includes: performing correlation decoupling on specific processing modules that meet predetermined decoupling conditions in the digital predistortion (DPD) adaptive process, and obtaining correlation decoupling results, wherein the decoupling conditions include: calculation amount, Operation type, decoupling possibility, decoupling complexity, decoupling risk, and decoupling efficiency acceleration ratio; parallel processing of irrelevant data that meets the predetermined degree of correlation in the correlation decoupling results to obtain parallel processing data; Perform result merge processing on the parallel processing data to obtain the result merge data. Through the present invention, different core loads of the processor can be balanced, and at the same time, the execution speed can be effectively improved, the DPD self-adaptation process can be accelerated and convergence can be achieved, the nonlinear change of the system can be better tracked, and the system efficiency and performance can be improved.

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 the efficiency of the 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 adopts a digital signal processor (Digital Signal Processor, referred to as DSP for short) serial adaptive method, but in terms of hardware architecture, cost and efficiency, especially in multi-antenna predistortion application scenarios, DSP-based The serial adaptive method is relatively inefficient. [0003] The DPD algorithm requires the ideal parameter estimation time to be less than one second in order to better t...

Claims

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Application Information

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Patent Type & Authority Patents(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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