Fully-Digital Blind Compensation of Non-Linear Distortions in Wideband Receivers

Abstract :

Digital post-distortion is becoming an increasingly attractive solution to compensate for the non-linearities of RF receivers implemented in deep submicron CMOS technologies. A very promising technique which provides flexibility and robustness is the frequency spreading based digital post-distortion. This paper focuses on the analysis of this approach for wideband receivers and its main limitations, such as the anti-alias filter (AAF) impact. As a matter of fact, distortions filtered by the AAF can degrade the correction performance. To overcome this problem, a novel solution based on mimicking the AAF frequency response in the digital domain is proposed. Aspects regarding the estimation and the algorithm convergence are also studied: the noise effect and the choice of the free frequency band. Furthermore, two other techniques are developed to improve the modeling and the correction of the memory effect using, respectively, a bank of filters and two-step architecture. The proposed techniques are demonstrated by simulations and measurements on a multi-channel receiver suited for DVB-T applications. The receiver is based on a 1-GHz bandwidth RF front-end followed by a 2.7-GHz 13-bit analog-to-digital converter.

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https://hal.telecom-paristech.fr/hal-02287579
Contributor : Telecomparis Hal <>
Submitted on : Friday, September 13, 2019 - 5:06:44 PM
Last modification on : Thursday, October 17, 2019 - 12:37:00 PM

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  • HAL Id : hal-02287579, version 1

Citation

Raphaël Vansebrouck, Chadi Jabbour, Olivier Jamin, Patricia Desgreys. Fully-Digital Blind Compensation of Non-Linear Distortions in Wideband Receivers. Transactions on Circuits and Systems I, 2017, 64 (8), pp.2112-2123. ⟨hal-02287579⟩

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