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. A communication system consists of a transmitter, a relay, and a 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 the channel and quality of the dual-hop wireless link. Simulation results show comparisons based on the MSE of channel state information. It can be seen that the quality of communication is degraded because performances depend on AF processing, which needs perfect CSI.
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