Hybrid Beamforming Transmitter Modeling for Millimeter-Wave MIMO Applications
Artikel i vetenskaplig tidskrift, 2020

Hybrid digital and analog beamforming is an emerging technique for high-data-rate communication at millimeter-wave (mm-wave) frequencies. Experimental evaluation of such techniques is challenging, time-consuming, and costly. This article presents a hardware-oriented modeling method for predicting the performance of an mm-wave hybrid beamforming transmitter. The proposed method considers the effect of active circuit nonlinearity as well as the coupling and mismatch in the antenna array. It also provides a comprehensive prediction of radiation patterns and far-field signal distortions. Furthermore, it predicts the antenna input active impedance, considering the effect of active circuit load-dependent characteristics. The method is experimentally verified by a 29-GHz beamforming subarray module comprising an analog beamforming integrated circuit (IC) and a 2 times 2 subarray microstrip patch antenna. The measurement results present good agreement with the predicted ones for a wide range of beam-steering angles. As a use case of the model, far-field nonlinear distortions for different antenna array configurations are studied. The demonstration shows that the variation of nonlinear distortion versus steering angle depends significantly on the array configuration and beam direction. Moreover, the results illustrate the importance of considering the joint operation of beamforming ICs, antenna array, and linearization in the design of mm-wave beamforming transmitters.

Active antenna array

beam steering

far-field nonlinear distortion

active impedance

millimeter wave (mm-wave).

hybrid beamforming transmitter


Parastoo Taghikhani

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Koen Buisman

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. 68 11 4740-4752 9106824

Silicon-based Ka-band massive MIMO antenna systems for new telecommunication services (SILIKA)

Europeiska kommissionen (EU) (EC/H2020/721732), 2016-09-01 -- 2020-08-31.





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