A Modified Decomposed Vector Rotation-Based Behavioral Model With Efficient Hardware Implementation for Digital Predistortion of RF Power Amplifiers
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Title: | A Modified Decomposed Vector Rotation-Based Behavioral Model With Efficient Hardware Implementation for Digital Predistortion of RF Power Amplifiers | Authors: | Cao, Wenhui; Zhu, Anding | Permanent link: | http://hdl.handle.net/10197/8380 | Date: | 23-Jan-2017 | Online since: | 2017-02-28T13:35:58Z | Abstract: | This paper proposes a novel hardware implementation strategy to achieve low-cost design for digital predistortion (DPD) of radio frequency (RF) power amplifiers (PAs) using a modified decomposed vector rotation (DVR)-based behavioral model. To make the model hardware friendly, we first modify the model into a sub-decomposed format which significantly reduces the computational complexity in model extraction. We then reassemble the coefficients and propose a simple digital implementation structure for real-time signal processing in the transmit path. A new Dual-Direction COordinate Rotation DIgital Computer (DD-CORDIC) design is also proposed to simultaneously calculate both magnitude and ejθn values to facilitate the model implementation. To validate hardware implementation, a wide-band signal is employed to evaluate the performance with a Doherty power amplifier. Experimental results show that the proposed approach can achieve comparable performance with much lower system complexity compared to that using the conventional approaches. | Type of material: | Journal Article | Publisher: | IEEE | Journal: | IEEE Transactions on Microwave Theory and Techniques | Volume: | PP | Issue: | 99 | Start page: | 1 | End page: | 10 | Copyright (published version): | 2017 IEEE | Keywords: | Behavioral model; CORDIC; Digital predistortion; Model extraction; Power amplifier; Radio frequency | DOI: | 10.1109/TMTT.2016.2640318 | Language: | en | Status of Item: | Peer reviewed | This item is made available under a Creative Commons License: | https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ |
Appears in Collections: | Electrical and Electronic Engineering Research Collection |
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