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Title: Optimality of binary power-control in a single cell via majorization
Authors: Inaltekin, H.
Hanly, S. 
Keywords: Communication networks
sum-rate capacity
Issue Date: 2011
Citation: Inaltekin, H.,Hanly, S. (2011). Optimality of binary power-control in a single cell via majorization. IEEE International Symposium on Information Theory - Proceedings : 2891-2895. ScholarBank@NUS Repository.
Abstract: This paper considers the optimum single cell power-control maximizing the aggregate (uplink) communication rate of the cell when there are peak power constraints at mobile users, and a low-complexity data decoder (without successive decoding) at the base station. It is shown, via the theory of majorization, that the optimum power allocation is binary, which means links are either "on" or "off". By exploiting further structure of the optimum binary power allocation, a simple polynomial-time algorithm for finding the optimum transmission power allocation is proposed. Sufficient conditions under which channel-state aware time-division-multiple-access (TDMA) maximizes the aggregate communication rate are established. Finally, a simulation study is performed and it is observed that two dominant modes of communication arise, wideband or TDMA. The heuristic algorithm that chooses the best of these two modes is observed to be extremely close to optimal. © 2011 IEEE.
Source Title: IEEE International Symposium on Information Theory - Proceedings
ISBN: 9781457705953
ISSN: 21578104
DOI: 10.1109/ISIT.2011.6034104
Appears in Collections:Staff Publications

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