A novel adaptive UCD-based MU-MIMO scheme for IEEE 802.11ac

Konferenz: European Wireless 2014 - 20th European Wireless Conference
14.05.2014 - 16.05.2014 in Barcelona, Spain

Tagungsband: European Wireless 2014

Seiten: 6Sprache: EnglischTyp: PDF

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Panajotovic, Aleksandra (Faculty of Electronic Engineering, University of Nis, Serbia)
Riera-Palou, Felip; Femenias, Guillem (Mobile Communications Group, University of the Balearic Islands, Spain)

This paper proposes a novel adaptive transmission scheme based on the uniform channel decomposition (UCD)-based that enables multiuser MIMO-OFDM gains to be realized while remaining fully compliant with the latest IEEE 802.11ac draft. In particular, the proposed technique takes into account the availability of a finite modulation and coding set and the restrictions concerning the transmission mode selection defined in IEEE 802.11ac. Users are selected using a proportionally fair scheduling algorithm and the UCD is adaptively optimized to allocate a number of per-user subchannels maximizing the system throughput. Simulation results in the context of IEEE 802.11ac confirm the advantage of the UCD approach when compared to the conventional singular value decomposition (SVD)-based approach.