An Effective Deploying Strategy of Relay Nodes in Line-of-sight MIMO System
Yan Yao · Journal of Xiamen University · 2010
No spatial degree-of freedom gain is obtained for MIMO system in Line-of-Sight(LOS) environments.A suboptimal deploying strategy of relay nodes is developed to improve performance in LOS MIMO system,which require only a few relay nodes.In this strategy,the number of relay nodes is determined by the maximum number of spatial degree of freedom provided by MIMO system.And the location of relay nodes is determined by direction of main lobes of transmit and receive antennas.Simulation results indicate that,compared to LOS MIMO system,the system based the scheme obtains capacity gain in large SNR which become larger as SNR become larger.Moreover,system capacity only fluctuates a little when the positional deviation of relay nodes happens.