Behavioral Modeling of Quadrature Modulators for Characterization of Nonlinear Distortion

Author

Li, Minsheng ; Hoover, Lowell ; Gard, Kevin G. ; Steer, Michael B.

Author_Institution

Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC

fYear

2006

fDate

11-16 June 2006

Firstpage

1117

Lastpage

1120

Abstract

A behavioral model of the nonlinear response of a microwave quadrature modulator is developed to investigate the impact of modulator nonlinearity on spectral regrowth of wireless communications signals. The nonlinear characteristic of each input is modeled by a complex power series. The model parameters are extracted from the single-tone amplitude-to-amplitude (AM-AM) and amplitude-to-phase (AM-PM) measurement data. The model was verified with an uplink WCDMA pilot signal applied to the quadrature modulator. The measured ACLR data is in excellent agreement with the modeled results

Keywords

code division multiple access; modulators; nonlinear distortion; phase modulation; quadrature amplitude modulation; ACLR data; AM-AM measurement data; AM-PM measurement data; WCDMA pilot signal; amplitude-to-amplitude measurement data; amplitude-to-phase measurement data; behavioral model; microwave quadrature modulator; modulator nonlinearity; nonlinear distortion; nonlinear response; spectral regrowth; wireless communications signals; Baseband; Circuit simulation; Distortion measurement; Multiaccess communication; Nonlinear distortion; Power amplifiers; Power system modeling; Pulse amplifiers; RF signals; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2006. IEEE MTT-S International

Conference_Location

San Francisco, CA

ISSN

0149-645X

Print_ISBN

0-7803-9541-7

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2006.249959

Filename

4015116