University of Oulu

J. Kaleva, A. Toelli, M. Juntti, R. Berry and M. Honig, "Decentralized Joint Precoding for WSRMax with Pilot Aided Beamformer Estimation," GLOBECOM 2017 - 2017 IEEE Global Communications Conference, Singapore, 2017, pp. 1-6. doi: 10.1109/GLOCOM.2017.8254536

Decentralized joint precoding for WSRMax with pilot aided beamformer estimation

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Author: Kaleva, Jarkko1; Tölli, Antti1; Juntti, Markku1;
Organizations: 1Centre for Wireless Communications, University of Oulu P.O. Box 4500, 90014 University of Oulu, Finland
2Northwestern University, Dept. of Elect. Engineering and Comp. Science, Evanston, IL, 60208, U.S.
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.3 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2017
Publish Date: 2018-07-31


Downlink weighted sum rate maximizing beamformer design is considered for joint processing (JP) coordinated multi-point (CoMP) transmission. Global channel state information exchange, required by the centralized JP CoMP processing, is in many scenarios impractical due to the backhaul latency and capacity requirements. Low overhead decentralized processing enables JP even with limited backhaul capacity. The proposed best response (BR) design also takes into account the possibly non-orthogonal pilot design and noisy pilot estimation. By allowing spatially overlapping pilot sequences, the transceiver processing requires only the channel state information of locally served users. This enables more flexible pilot design and makes the proposed approach realizable in practical time correlated and noisy channel conditions. Furthermore, the proposed BR algorithm provides low signaling overhead for systems with limited backhaul capacity. Robustness for fading channel conditions and limited pilot resources is shown by numerical examples.

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Series: IEEE Global Communications Conference
ISSN: 2334-0983
ISSN-L: 2334-0983
ISBN: 978-1-5090-5019-2
ISBN Print: 978-1-5090-5020-8
Pages: 1 - 6
DOI: 10.1109/GLOCOM.2017.8254536
Host publication: 2017 IEEE Global Communications Conference (GLOBECOM) Proceedings Singapore 4 – 8 December 2017
Conference: IEEE Global Communications Conference
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
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