University of Oulu

P. K. Shah, K. Joshi, S. Joshi, A. Tolli and K. Umebayashi, "Direct Beamformer Estimation for Hybrid Architecture in mmWave Dynamic TDD System," 2020 IEEE Wireless Communications and Networking Conference Workshops (WCNCW), Seoul, Korea (South), 2020, pp. 1-6, doi: 10.1109/WCNCW48565.2020.9124904

Direct beamformer estimation for hybrid architecture in mmWave dynamic TDD system

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Author: Shah, Prashant Kumar1; Joshi, Krishna1; Joshi, Satya1;
Organizations: 1Centre for Wireless Communications, University of Oulu, P.O. Box 4500, 90014, Finland
2Dept. of Electrical and Electronic Engineering, Tokyo University of Agriculture and Technology, Japan
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.2 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2020
Publish Date: 2020-10-16


The problem of weighted sum-rate maximization for hybrid architecture in millimeter wave communications with dynamic time division duplexing is considered. We propose an over the air pilot- aided direct beamforming estimation technique for the considered problem, by exploiting the channel reciprocity. Proper selection of analog precoder/combiner not only suppresses large part of interference, but also ensures that less coordination is required for digital precoder/combiner design. We design analog precoder/combiner for each data stream in such a way that its signal strength is maximized; this strategy also minimizes large part of inter-stream interference that may arise due to the main lobe of analog beamformer. Then we design digital beamformer such that inter-stream interference is further mitigated, maximizing the overall weighted sum-rate of the network.

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ISBN: 978-1-7281-5178-6
ISBN Print: 978-1-7281-5179-3
Pages: 1 - 6
Article number: 9124904
DOI: 10.1109/WCNCW48565.2020.9124904
Host publication: 2020 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2020
Conference: IEEE Wireless Communications and Networking Conference Workshops
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported by the European Commission in the framework of the H2020-EUJ-02-2018 project 5G-Enhance (Grant agreement no. 815056), the Academy of Finland 6Genesis Flagship (grant no. 318927), and the Ministry of Internal Affairs and Communications (MIC) of Japan.
EU Grant Number: (815056) 5G-Enhance - 5G Enhanced Mobile Broadband Access Networks in Crowded Environments
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
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