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Optimal Multiuser Transmit Beamforming: A Difficult Problem with a Simple Solution Structure
KTH, School of Electrical Engineering (EES), Signal Processing. Dept. of Electrical Engineering, Linkoping University, Sweden.
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0002-3599-5584
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0003-2298-6774
2014 (English)In: IEEE signal processing magazine (Print), ISSN 1053-5888, E-ISSN 1558-0792, Vol. 31, no 4, 142-148 p.Article in journal (Refereed) Published
Abstract [en]

Transmit beamforming is a versatile technique for signal transmission from an array of antennas to one or multiple users [1]. In wireless communications, the goal is to increase the signal power at the intended user and reduce interference to nonintended users. A high signal power is achieved by transmitting the same data signal from all antennas but with different amplitudes and phases, such that the signal components add coherently at the user. Low interference is accomplished by making the signal components add destructively at nonintended users. This corresponds mathematically to designing beamforming vectors (that describe the amplitudes and phases) to have large inner products with the vectors describing the intended channels and small inner products with nonintended user channels.

Place, publisher, year, edition, pages
2014. Vol. 31, no 4, 142-148 p.
Keyword [en]
Antennas, Beamforming, Interference suppression, Product design, Wireless telecommunication systems, Inner product, Lecture Notes, Multiple user, Signal components, Signal transmission, Solution structures, Transmit beamforming, Wireless communications
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-148374DOI: 10.1109/MSP.2014.2312183ISI: 000337840100017Scopus ID: 2-s2.0-84903154019OAI: oai:DiVA.org:kth-148374DiVA: diva2:736155
Funder
Swedish Research Council, 2012-228EU, FP7, Seventh Framework Programme, 228044
Note

QC 20140805

Available from: 2014-08-05 Created: 2014-08-05 Last updated: 2017-12-05Bibliographically approved

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Bengtsson, MatsOttersten, Björn

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