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Uplink throughput maximization with combined sum and individual power constraints
KTH, School of Electrical Engineering (EES), Signal Processing.
2006 (English)In: IEEE Communications Letters, ISSN 1089-7798, E-ISSN 1558-2558, Vol. 10, no 12, 816-818 p.Article in journal (Refereed) Published
Abstract [en]

Optimal power allocation in cellular uplink systems is used to maximize the average throughput under individual and sum power constraints. In the uplink, the transmit power of the mobiles is limited leading to individual power constraints. Additionally, in order to reduce the inter-cell interference, the sum power is constraint. First, we approximate the individual and sum power constraints by a combined constraint on a suitable l-norm of the power allocation vector. Then, we derive the optimal power allocation for individual and sum power constraints as well as for the combined constraint for the three CSI scenarios with uninformed transmitter, long-term feedback, and perfect CSI. The results and illustrations show that under combined sum and individual power constraints completely different power allocation strategies are optimal than with pure sum or pure individual power constraints.

Place, publisher, year, edition, pages
2006. Vol. 10, no 12, 816-818 p.
Keyword [en]
multiaccess communication, power control, fading channels, information theory
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-37493DOI: 10.1109/LCOMM.2006.061007ISI: 000242550900006Scopus ID: 2-s2.0-33845728949OAI: oai:DiVA.org:kth-37493DiVA: diva2:434315
Note
QC 20110815Available from: 2011-08-15 Created: 2011-08-12 Last updated: 2017-12-08Bibliographically approved

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