Joint Compensation of I/Q Impairments and Power Amplifier Nonlinearity for Concurrent Dual-Band Transmitters Using Two-Box Model

Author

Bozic, Milica ; Budimir, Djuradj

Author_Institution

Wireless Commun. Res. Group, Univ. of Westminster, London, UK

Volume

25

Issue

5

fYear

2015

fDate

May-15

Firstpage

340

Lastpage

342

Abstract

A novel two-box model for joint compensation of nonlinear distortion introduced from both in-phase/quadrature modulator and power amplifier is proposed for concurrent dual-band wireless transmitters. Compensation of nonlinear distortion is accomplished in two phases, where phases are identified separately. It is shown that complexity of the digital predistortion is reduced. The performance of the proposed model is evaluated in terms of ACPR, EVM, and NMSE improvements using 1.4 MHz LTE and WCDMA signals.

Keywords

Long Term Evolution; code division multiple access; modulators; nonlinear distortion; power amplifiers; radio transmitters; ACPR improvement; EVM improvement; I-Q impairments; LTE signal; NMSE improvement; WCDMA signal; concurrent dual-band transmitters; concurrent dual-band wireless transmitters; digital predistortion complexity; in-phase-quadrature modulator; joint compensation; nonlinear distortion compensation; power amplifier nonlinearity; two-box model; Complexity theory; Computational modeling; Dual band; Joints; Nonlinear distortion; Transmitters; Wireless communication; I/Q modulators; nonlinear distortion; power amplifiers (PAs); two-box model;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2015.2409771

Filename

7076650