Prediction of smart antenna transmitter characteristics using a new behavioral modeling approach
Paper in proceedings, 2014

A new technique for analysis of nonlinear effects in smart antenna array transmitter systems is presented. The analysis is founded on a new type of dual-input circuit behavioral model which allows nonlinear effects caused by antenna mutual-coupling and mismatch to be predicted under realistic wideband signal excitations. The model formulation enables direct interface with multi-port antenna S-parameters and detailed prediction of radiated field characteristics. The method is validated by over-the-air WCDMA measurements on a dual-antenna 2.14 GHz MIMO transmitter. The results demonstrate that antenna mutual coupling may lead to significant nonlinear distortion that cannot be compensated for by conventional linearization techniques.

Smart antenna

power amplifiers

distortion

MIMO

Author

Christian Fager

GigaHertz Centre

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Xavier Bland

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

GigaHertz Centre

Katharina Hausmair

GigaHertz Centre

Chalmers, Signals and Systems, Communication and Antenna Systems

Jessica Chani Cahuana

Chalmers, Signals and Systems, Communication and Antenna Systems

GigaHertz Centre

Thomas Eriksson

GigaHertz Centre

Chalmers, Signals and Systems, Communication and Antenna Systems

IEEE MTT-S International Microwave Symposium Digest

0149645X (ISSN)

6848309

Subject Categories

Signal Processing

DOI

10.1109/MWSYM.2014.6848309

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7/24/2019