University of Oulu

J. Kaleva, A. Tölli, M. Juntti, R. Berry and M. Honig, "Gradient based decentralized joint beamforming," 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), Montreal, QC, 2017, pp. 1-5. doi: 10.1109/PIMRC.2017.8292334

Gradient based decentralized joint beamforming

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Author: Kaleva, Jarkko1; Tölli, Antti1; Juntti, Markku1;
Organizations: 1Centre for Wireless Communications, Univ. of Oulu, P.O. Box 4500, 90014, Univ. of Oulu, Finland
2Dept. of Elect. Engineering and Comp. Science, Northwestern University, Evanston, IL, 60208, U.S.
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.2 MB)
Persistent link:
Language: English
Published: Institute of Electrical and Electronics Engineers, 2017
Publish Date: 2018-08-02


Gradient based downlink beamforming with low computational complexity and training overhead is proposed for joint processing (JP) coordinated multi-point transmission (CoMP). Pilot contamination and estimation noise are taken into account in the pilot based transceiver training process. The proposed designs enable decentralized JP when the backhaul and computational limitations do not allow centralized processing. The impact of backhaul quantization is also considered. The stochastic gradient based designs are shown to be more robust to feedback quantization when compared to more complex methods. The trade-off between the implementation complexity and performance is established for the proposed algorithms. The results show that low complexity decentralized JP CoMP is feasible even with limited backhaul capacity.

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Series: IEEE International Symposium on Personal, Indoor, and Mobile Radio Communications workshops
ISSN: 2166-9570
ISSN-E: 2166-9589
ISSN-L: 2166-9570
ISBN: 978-1-5386-3531-5
ISBN Print: 978-1-5386-3529-2
Article number: 8292334
DOI: 10.1109/PIMRC.2017.8292334
Host publication: 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
Conference: Annual International Symposium on Personal, Indoor and Mobile Radio Communications
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
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