Dual-Input Vector-Switched Behavioral Model for Multi-Antenna Scenarios Affected by Antenna Crosstalk

Riess D, Deublein A, Loose M, Musolff C, Fischer G, Fager C (2026)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2026

Publisher: IEEE

Pages Range: 1-4

Event location: Clearwater, FL, USA US

ISBN: 979-8-3315-8345-3

URI: https://ieeexplore.ieee.org/document/11602021

DOI: 10.1109/WAMICON68738.2026.11602021

Abstract

Antenna crosstalk in circulator-less multi-antenna transmitters (TXs) induces extrinsic load modulation at the power amplifier (PA) output, which interacts with PA nonlinearities and challenges conventional behavioral models. This paper presents a dual-input vector-switched (DI-VS) model that extends the dual-input memory polynomial (DI-MP) by incorporating amplitude-dependent nonlinear branches selected via a low-complexity switching mechanism. Experimental results on a GaN Doherty power amplifier (DPA) operating at 6.8 GHz demonstrate that the DI-VS model achieves up to 6 dB improvement in normalized mean square error (NMSE) and 7.7 dB enhancement in adjacent channel error power ratio (ACEPR) compared to the DI-MP at similar complexity. The model’s performance limits under increasing load mismatch are further investigated through active load-pull measurements.

Authors with CRIS profile

David Riess Lehrstuhl für Intelligente Technische Elektronik und Systeme Alexander Deublein Lehrstuhl für Intelligente Technische Elektronik und Systeme Michael Loose Lehrstuhl für Intelligente Technische Elektronik und Systeme Christian Musolff Lehrstuhl für Technische Elektronik (LTE) Georg Fischer Professur für Technische Elektronik

Involved external institutions

Chalmers University of Technology / Chalmers tekniska högskola SE Sweden (SE)

How to cite

APA:

Riess, D., Deublein, A., Loose, M., Musolff, C., Fischer, G., & Fager, C. (2026). Dual-Input Vector-Switched Behavioral Model for Multi-Antenna Scenarios Affected by Antenna Crosstalk. In Proceedings of the 2026 IEEE Wireless and Microwave Technology Conference (WAMICON) (pp. 1-4). Clearwater, FL, USA, US: IEEE.

MLA:

Riess, David, et al. "Dual-Input Vector-Switched Behavioral Model for Multi-Antenna Scenarios Affected by Antenna Crosstalk." Proceedings of the 2026 IEEE Wireless and Microwave Technology Conference (WAMICON), Clearwater, FL, USA IEEE, 2026. 1-4.

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