Digital pre-distortion processing method and device

A technology of digital pre-distortion and processing method, which is applied to parts of amplifying devices, improving amplifiers to reduce nonlinear distortion, electrical components, etc., can solve problems such as insufficient DPD processing performance, avoid ACPR performance deterioration, and correct distortion characteristics , the effect of good spectral efficiency

Active Publication Date: 2017-10-20
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0005] The embodiment of the present invention provides a digital pre-distortion processing method and device, which are used to effectively correct the distortion characteristics of the power amplifier and solve the problem of insufficient processing performance of the existing DPD under broadband signals

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  • Digital pre-distortion processing method and device

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Embodiment Construction

[0044] Embodiments of the present invention provide a digital pre-distortion processing method and device, which are used to effectively correct the distortion characteristics of a power amplifier and solve the problem of insufficient processing performance of the existing DPD under wideband signals.

[0045] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] see figure 1 , a digital pre...

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Abstract

The invention discloses a digital pre-distortion processing method and device. The method and the device are used for effectively correcting a distortion characteristic of a power amplifier and solving the problem that existing DPD (Digital Pre-Distortion) processing performance is insufficient under a broadband signal. The method comprises the steps of determining a digital pre-distortion model according to an input signal and determining an output signal of the power amplifier according to the digital pre-distortion model, wherein the digital pre-distortion model comprises a conjugate cross term and a nonlinear memory term; and calculating a DPD coefficient according to the output signal.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a digital predistortion processing method and device. Background technique [0002] The radio frequency power amplifier is a key device in the wireless communication system, which is used to amplify the modulated frequency band signal to the required power value and send it to the antenna for transmission. Generally speaking, when the input power is small, the power amplifier has good linearity. However, in practical applications, in order to improve power efficiency, it is always hoped that the amplifier will work close to the saturation point, at which point the nonlinearity of the amplifier will become very serious. For constant envelope modulation methods, such as frequency modulation and minimum offset keying, filtering techniques can be used to eliminate distortion products. Therefore, when the input signal is a constant envelope signal, the amplifier can w...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03F3/195H03F3/24
CPCH03F1/3258H03F3/195H03F3/245
Inventor 张永丽周丹王杰丽马静艳王静怡
Owner DATANG MOBILE COMM EQUIP CO LTD
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