Title :
Multi-user OFDM MIMO in IEEE 802.11ac WLAN: A simulation framework to analysis and synthesis
Author :
Fabris Hoefel, Roger Pierre
Author_Institution :
Dept. of Electr. Eng., Fed. Univ. of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
Abstract :
In this paper a simulation framework to analyze, design and optimize the physical layer of IEEE 802.11ac wireless local networks focusing on multi-user operation scenario is described and validated. The performance of channel inversion, regularized channel inversion and block diagonalization precoding schemes with zero forcing and minimum mean squared error multiple input multiple output (MIMO) detectors is evaluated over different configurations of 802.11 Task Group n (TGn) and TGac channel models. The expressive power loss due to multi-user operation has shown that more advanced precoding and MIMO detection schemes must be designed to allow satisfactory operation into feasible signal-to-noise-ratio ranges.
Keywords :
MIMO communication; OFDM modulation; least mean squares methods; multi-access systems; precoding; signal detection; telecommunication standards; wireless LAN; 802.11 Task Group n; IEEE 802.11ac; MIMO detection; TGac channel models; block diagonalization precoding; minimum mean squared error; multiple input multiple output detectors; multiuser OFDM MIMO; physical layer; regularized channel inversion; signal-to-noise-ratio; simulation framework; wireless LAN; wireless local area networks; zero forcing detector; Channel estimation; Channel models; IEEE 802.11n Standard; MIMO; Signal to noise ratio; Simulation; Transceivers; 802.11ac; MU-MIMO; OFDM; TGac channel models;
Conference_Titel :
Communications (LATINCOM), 2013 IEEE Latin-America Conference on
Conference_Location :
Santiago
Print_ISBN :
978-1-4799-1146-2
DOI :
10.1109/LatinCom.2013.6759823
