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1. CN103609018 - Interpolation-based digital pre-distortion architecture

Office Chine
Numéro de la demande 201280023037.5
Date de la demande 01.05.2012
Numéro de publication 103609018
Date de publication 26.02.2014
Numéro de délivrance 103609018
Date de délivrance 02.12.2015
Type de publication B
CIB
H03F 1/32
HÉLECTRICITÉ
03CIRCUITS ÉLECTRONIQUES FONDAMENTAUX
FAMPLIFICATEURS
1Détails des amplificateurs comportant comme éléments d'amplification uniquement des tubes à décharge, uniquement des dispositifs à semi-conducteurs ou uniquement des composants non spécifiés
32Modifications des amplificateurs pour réduire la distorsion non linéaire
CPC
H03F 1/3247
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32Modifications of amplifiers to reduce non-linear distortion
3241using predistortion circuits
3247using feedback acting on predistortion circuits
H03F 3/24
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
24of transmitter output stages
Déposants 康普技术有限责任公司
Inventeurs 雷杰弗·钱德拉瑟卡兰
乔治·P·维拉-库里洛
Mandataires 中国国际贸易促进委员会专利商标事务所 11038
Données relatives à la priorité 13289010 04.11.2011 US
61/485,149 12.05.2011 US
Titre
(EN) Interpolation-based digital pre-distortion architecture
(ZH) 基于插值的数字预失真结构
Abrégé
(EN)
A non-linear amplifier is linearized using interpolation-based digital pre-distortion (DPD). In one embodiment, the digital input signal is interpolated to generate a higher-sample-rate signal that is then pre-distorted. The resulting higher-sample-rate pre-distorted signal is then decimated to generate a final pre-distorted digital signal that is converted into an analog pre-distorted signal by a digital-to-analog converter (DAC) before being applied to the amplifier. In a polyphase embodiment, different versions of the original input digital signal are generated, where each version is then pre-distorted using a different DPD module to generate a different intermediate pre-distorted digital signal. The intermediate pre-distorted signals are filtered and combined to generate the final pre-distorted digital signal. In both embodiments, better linearization (e.g., less aliasing) can be achieved without increasing the sample rate of the DAC and, in the polyphase embodiment, without increasing the processing speed of the DPD modules.

(ZH)

一种非线性放大器使用基于插值的数字预失真(DPD)线性化。在一个实施例中,对数字输入信号进行插值以生成高采样率并然后预失真的信号。产生的高采样率预失真信号然后被抽取以生成最终预失真数字信号,该最终预失真数字信号在被施加至放大器之前通过数模转换器(DAC)被转换为模拟预失真信号。在多相实施方式中,生成原始输入数字信号的不同版本,其中每个版本随后使用不同的DPD模块被预失真以生成不同的中间预失真数字信号。该中间预失真信号被滤波并合并以生成最终的预失真数字信号。在两种实施例中,在无需增加DAC采样率的情况下可实现较好的线性化(例如,低混淆),并且,在多相实施方式中,无需增加DPD模块的处理速度。

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