RT Journal Article
T1 Effects of channel estimation on multiuser virtual MIMO-OFDMA relay-based networks
A1 Gil-Jiménez, Víctor P.
A1 Ribeiro, Carlos
A1 Gameiro, Atilio
A1 García-Armada, Ana
AB A practical multiuser 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 and using low-density parity-check (LDPC) codes. It is shown that this scheme is robust against channel estimation errors. It offers diversity and array gain, keeping the complexity low with a multiuser and multiantenna channel estimation algorithm that is simple and efficient. In addition, the combination with LDPC codes provides improved gains; diversity gains larger than 6 dB can be easily obtained with a reduced number of relays. Thus, this scheme can be used to extend coverage or increase system throughput by using simple cooperative OFDMA-based relays.
PB SpringerOpen
SN 1687-1472
YR 2010
FD 2010-11-11
LK https://hdl.handle.net/10016/14426
UL https://hdl.handle.net/10016/14426
LA eng
NO The authors would like to thank Jae-Yun Ko for his valuablehelp at the beginning of our work. This work has been partlyfunded by the projects MULTIADAPTIVE (TEC2008-06327-C03-02), COMONSENS (CSD2008-00010) and CODIV(ICT-2007-215477).
DS e-Archivo
RD 20 may. 2024