descriptionPublicationkeyboard_double_arrow_right Article , Conference object 01 Jun 2012Publisher:IEEEJournal:2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)

Authors: Caus López, Marius; Pérez Neira, Ana Isabel;

doi: 10.1109/spawc.2012.6292885

handle: 2117/18270

A suboptimal power allocation algorithm for FBMC/OQAM

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Abstract

This paper tackles the sum-rate maximization in FBMC systems. It is well-known that multipath fading destroys the orthogonality of the subcarriers, which brings a non-convex problem that can be interpreted as the maximization of a difference of concave functions. This reformulation enables using DC programming to find the global optimal but the complexity becomes unaffordable in the FBMC context. Aiming at reducing the complexity we have devised a new suboptimal algorithm. The idea consists in smartly partitioning the band into three subsets so that subcarrier signals belonging to the same subset do not overlap in the frequency domain. If subsets maximize sequentially their own rate the original problem is turned into three simpler problems. Simulation-based results show that the sum-rate is in the same order as the water-filling used in OFDM and a suboptimal solution based on DC programming. However, the addressed technique enables saving up to 25% of the power at SNR=22 dB.

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Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telemàtica i xarxes d'ordinadors, Comunicació sense fil, Sistemes de, Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Comunicacions mòbils, :Enginyeria de la telecomunicació::Telemàtica i xarxes d'ordinadors [Àrees temàtiques de la UPC], Comunicacions mòbils, Sistemes de, :Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Comunicacions mòbils [Àrees temàtiques de la UPC], Mobile communication systems, Wireless communication systems

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