University of Oulu

N. Tervo, J. Aikio, T. Tuovinen, T. Rahkonen and A. Parssinen, "Digital predistortion of amplitude varying phased array utilising over-the-air combining," 2017 IEEE MTT-S International Microwave Symposium (IMS), Honololu, HI, 2017, pp. 1165-1168. doi: 10.1109/MWSYM.2017.8058809

Digital predistortion of amplitude varying phased array utilising over-the-air combining

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Author: Tervo, Nuutti1; Aikio, Janne1; Tuovinen, Tommi1;
Organizations: 1Faculty of Information Technology and Electrical Engineering (ITEE), University of Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.5 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2017
Publish Date: 2018-06-27


In this paper, we propose a simple polynomial linearisation technique for nonlinear phased arrays including amplitude control. Due to the large number of antennas and thus power amplifiers in the array, it is inefficient to linearise each power amplifier individually. Therefore, it is demonstrated that the array can be linearised over-the-air using single polynomial. The simulations show that the linearisation is achieved by first linearising the higher driven PAs at the precompression region and then cancelling the compression by the heavily expanding lower driven PAs. The proposed approach offers an alternative way of re-thinking the concept of array linearisation over multiple PAs.

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Series: IEEE MTT-S International Microwave Symposium digest
ISSN: 0149-645X
ISSN-L: 0149-645X
ISBN: 978-1-5090-6360-4
Pages: 1165 - 1168
DOI: 10.1109/MWSYM.2017.8058809
Host publication: 2017 IEEE MTT-S International Microwave Symposium (IMS)
Conference: IEEE MTT-S International Microwave Symposium
Type of Publication: A4 Article in conference proceedings
Field of Science: 222 Other engineering and technologies
111 Mathematics
213 Electronic, automation and communications engineering, electronics
Funding: This research has been supported by Infotech Oulu Doctoral Programme, Finnish Funding Agency for Technology and Innovation (Tekes), Nokia Oyj, Esju Oy and CoreHW Oy.
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