Optimal Coordinated Beamforming in the Multicell Downlink with Transceiver Impairments
2012 (English)In: 2012 IEEE Global Telecommunications Conference (GLOBECOM), New York: IEEE conference proceedings, 2012, 4775-4780 p.Conference paper (Refereed)
Physical wireless transceivers suffer from a variety of impairments that distort the transmitted and received signals. Their degrading impact is particularly evident in modern systems with multiuser transmission, high transmit power, and low-cost devices, but their existence is routinely ignored in the optimization literature for multicell transmission. This paper provides a detailed analysis of coordinated beamforming in the multicell downlink. We solve two optimization problems under a transceiver impairment model and derive the structure of the optimal solutions. We show numerically that these solutions greatly reduce the impact of impairments, compared with beamforming developed for ideal transceivers. Although the so-called multiplexing gain is zero under transceiver impairments, we show that the gain of multiplexing can be large at practical SNRs.
Place, publisher, year, edition, pages
New York: IEEE conference proceedings, 2012. 4775-4780 p.
, IEEE Global Telecommunications Conference (Globecom), ISSN 1930-529X
Coordinated beamforming, Low-cost devices, Multiplexing gains, Multiuser transmissions, Optimal solutions, Optimization problems, Received signals, Wireless transceiver
IdentifiersURN: urn:nbn:se:kth:diva-116597DOI: 10.1109/GLOCOM.2012.6503874ISI: 000322375105023ScopusID: 2-s2.0-84877682558ISBN: 978-1-4673-0921-9OAI: oai:DiVA.org:kth-116597DiVA: diva2:596774
2012 IEEE Global Communications Conference, GLOBECOM 2012; Anaheim, CA; United States; 3 December 2012 through 7 December 2012
QC 201301232013-01-222013-01-222014-03-03Bibliographically approved