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Title: Effects of channel estimation on multiuser virtual MIMO-OFDMA relay-based networks
Author: Gil Jiménez, V.P.
Ribeiro, C.
Gameiro, A.
Armada, A.G.
Keywords: MIMO-OFDMA
Virtual maximum ratio transmission
Channel estimation
Virtual STBC
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.
Peer review: yes
DOI: 10.1155/2010/764784
ISSN: 1687-1472
Appears in Collections:DETI - Artigos

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