Uplink throughput maximization with combined sum and individual power constraints
2006 (English)In: IEEE Communications Letters, ISSN 1089-7798, Vol. 10, no 12, 816-818 p.Article in journal (Refereed) Published
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.
multiaccess communication, power control, fading channels, information theory
IdentifiersURN: urn:nbn:se:kth:diva-37493DOI: 10.1109/LCOMM.2006.061007ISI: 000242550900006ScopusID: 2-s2.0-33845728949OAI: oai:DiVA.org:kth-37493DiVA: diva2:434315
QC 201108152011-08-152011-08-122011-08-15Bibliographically approved