ISSN : 1796-2021
Volume : 2    Issue : 5    Date : August 2007

High Efficient Mobile WiMAX with MIMO and Miltihop Relay
Yan Q. Bian, Yong Sun, Andrew R. Nix, and Joseph P. McGeehan
Page(s): 7-15
Full Text:
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MIMO and relay technology is currently being promoted within the IEEE to enhance performance of
broadband wireless standards such as WiMAX. However, due to licensed spectrum, it is necessary
to implement highly efficient radio resource management. For optimal system design, it is
beneficial to achieve higher system data throughput with fewer radio resources employed. This
paper presents a comprehensive study of MIMO mobile WiMAX with multihop relay technology for
high efficient multiuser transmission. A directional distributed relaying architecture is introduced in
order to leverage link-level and system-level capacity. Practical applications are also demonstrated
for an example urban environment.

Index Terms
WiMAX, MIMO, multihop relay, spectral efficiency, radio resource sharing, interference, ray tracing,
subchannel allocation