Performance of MIMO Relay Communication System based on OFDM
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Wireless Broadband Channel, Relay, (MIMO) Multi input Multi output
Abstract
In this paper, Performance for Multi Input Multi Output (MIMO) dual hop non-regenerative (Amplify-and-Forward) (AF) system based on Orthogonal Frequency Division Multiplexing (OFDM) under imperfect channel is evaluated. Communication system consists of transmitter , relay and receiver. The relay can be used in AF to extend communication range where direct line of sight is unavailable. Channel State Information CSI is assumed to be imperfectly known and Mean Square Error (MSE) of channel estimation errors in the two hops are considered to evaluate the capacity of channel and quality of dual hop wireless link. Simulation results show comparing based on MSE of channel state information . It can be seen that the quality of communication is degraded because performances are depended on AF processing which need perfect CSI.
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