Title :
2D forward twin nonlinear two-box model for concurrent dual-band digital predistortion
Author :
Quindroit, Christophe ; Naraharisetti, Naveen ; Roblin, Patrick ; Gheitanchi, Shahin ; Mauer, Volker ; Fitton, Mike
Author_Institution :
Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
In this paper, a dual-band forward twin nonlinear two-box model is proposed to compensate for the nonlinearity of the power amplifier in concurrent dual-band signal mode. By taking into account nonlinear memory effects, the new dual-band digital predistortion (DPD) architecture improves the linearization performances of the 2D-Hammerstein model while reducing the complexity compared to the 2D-DPD model. An experimental test bench based on an FPGA is also presented. Linearization and complexity performances are evaluated and compared using a 10W peak power amplifier and a dual-band signal (single-carrier LTE and 3-carrier WCDMA) center frequency spaced by 310MHz. Results show a reduced complexity while achieving similar performances as 2D-DPD. Adjacent channel power ratios (ACPRs) are reduced below -50 dBc and normalized mean square error (NMSE) close to -40 dB.
Keywords :
integrated circuit design; integrated circuit modelling; linearisation techniques; power amplifiers; 2D-Hammerstein model; FPGA; LTE; WCDMA; adjacent channel power ratios; concurrent dual-band digital predistortion; concurrent dual-band signal mode; dual-band forward twin nonlinear two-box model; frequency 310 MHz; linearization performances of the; nonlinear memory effects; normalized mean square error; peak power amplifier; power 10 W; Complexity theory; Dual band; Field programmable gate arrays; Mathematical model; Microwave theory and techniques; Polynomials; Predistortion; Hammerstein; Power amplifiers (PAs); concurrent dual-band; digital predistortion (DPD);
Conference_Titel :
Power Amplifiers for Wireless and Radio Applications (PAWR), 2014 IEEE Topical Conference on
Conference_Location :
Newport Beach, CA
Print_ISBN :
978-1-4799-2298-7
DOI :
10.1109/PAWR.2014.6825742
