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 Effects of channel estimation on multiuser virtual MIMO-OFDMA relay-based networks
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/7008

title: Effects of channel estimation on multiuser virtual MIMO-OFDMA relay-based networks
authors: Gil Jiménez, V.P.
Ribeiro, C.
Gameiro, A.
Armada, A.G.
keywords: MIMO-OFDMA,
Virtual maximum ratio transmission
Channel estimation
Virtual STBC, beamforming
issue date: 14-Nov-2010
publisher: SpringerOpen
abstract: In this paper, a practical multi-user cooperative transmission scheme denoted as Virtual Maximum Ratio Transmission (VMRT) for Multiple-Input Multiple-Output - Orthogonal Frequency Division Multiple Access (MIMO-OFDMA) Relay-based networks is proposed and evaluated in the presence of a realistic channel estimation algorithm. It is shown that this scheme is robust against channel estimation errors and offers diversity and array gain keeping the complexity low, although the multi-user and multi-antenna channel estimation algorithm is simple and efficient. Diversity gains larger than 4 can be easily obtained with reduced number of relays. Thus, this scheme can be used to extend coverage or increase system throughput by using simple cooperative OFDMA-based relays.
URI: http://hdl.handle.net/10773/7008
ISSN: 1687-1472
publisher version/DOI: dx.doi.org/10.1155/2010/764784
source: Eurasip Journal on Wireless Communications and Networking
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