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Prediction of smart antenna transmitter characteristics using a new behavioral modeling approach

Christian Fager (GigaHertz Centrum) ; Xavier Bland (GigaHertz Centrum) ; Katharina Hausmair (GigaHertz Centrum) ; Jessica Chani Cahuana (GigaHertz Centrum) ; Thomas Eriksson (GigaHertz Centrum)
2014 IEEE MTT-S International Microwave Symposium, IMS 2014; Tampa, FL; United States; 1 June 2014 through 6 June 2014 (0149-645X). (2014)
[Konferensbidrag, refereegranskat]

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.

Nyckelord: distortion , MIMO , power amplifiers , Smart antenna

Denna post skapades 2014-08-21. Senast ändrad 2016-02-01.
CPL Pubid: 201786


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