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|Title:||Effects of channel estimation on multiuser virtual MIMO-OFDMA relay-based networks|
|Author:||Gil Jiménez, V.P.|
Virtual maximum ratio transmission
Virtual STBC, beamforming
|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.|
|Appears in Collections:||DETI - Artigos|
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