Title :
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
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;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2015.2409771
