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Adaptive data screening method and system for base station digital intermediate frequency predistortion system

A digital intermediate frequency and data screening technology, which is applied in the transmission system, synchronization/start-stop system, transmission monitoring, etc., can solve the problems of DPD system data selection and research, and achieve the effect of ensuring reliability and improving performance

Active Publication Date: 2021-06-11
WUHAN GEWEI ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are some literatures and patents researching the technical details of digital predistortion, most of them focus on feedback signal quadrature error calibration, link delay calibration, model realization and calculation optimization, and there is almost no research on data selection for DPD system modeling.

Method used

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  • Adaptive data screening method and system for base station digital intermediate frequency predistortion system
  • Adaptive data screening method and system for base station digital intermediate frequency predistortion system
  • Adaptive data screening method and system for base station digital intermediate frequency predistortion system

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] The present invention is a data selection method suitable for parameter estimation of a digital intermediate frequency predistortion system. In order to ensure that the downlink large peak signal can be adaptively captured for digital predistortion system modeling, the present invention proposes a large peak value for the downlink digital intermediate frequency signal. The new algorithm of peak power adaptive matching can effectively ensure the reliability of data collection by the pre-distortion system by capturing data exceeding the peak power threshold for DPD parameter estimation.

[003...

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Abstract

The invention discloses an adaptive data screening method and system for a base station digital intermediate frequency pre-distortion system. The method comprises the following steps: S1, adaptively adjusting a peak power threshold of instantaneous power of a downlink digital signal to be detected; S2, when a data acquisition request is received, performing instantaneous peak power detection on the downlink digital signal; S3, when the detected instantaneous peak power exceeds the current peak power threshold, initiating a grabbing request for downlink data; and S4, collecting the forward transmitting signal and the feedback receiving signal with the same length. According to the invention, the data acquisition reliability of the pre-distortion system is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a base station digital intermediate frequency predistortion system adaptive data screening method used for base station digital predistortion system parameter estimation. Background technique [0002] In recent years, with the rapid development of communication technology, especially in the 4 / 5G era, the radio frequency transmission system of the base station has put forward higher requirements on the linearity of the power amplifier (Power Amplifier, PA). PA nonlinear distortion will cause signal out-of-band spectrum spread and adjacent channel interference, degrading communication system performance. The calibration of PA nonlinear distortion in the industry is mostly carried out in the digital domain, that is, digital pre-distortion (Digital Pre-Distortion, DPD). The method is to sample the received signal looped back through the feedback link through the ADC de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49H04B17/309
CPCH04L25/49H04B17/309Y02D30/70
Inventor 石军军
Owner WUHAN GEWEI ELECTRONICS TECH