Abstract
In this paper we study the end-to-end bit error and outage probability (OP) performance of dual-hop multiple input multiple output (MIMO) systems with Alamouti’s coding using modified amplify and forward (MAF) relaying under flat Rayleigh fading channels. The bit error performances of dual-hop MIMO systems with variable gain relays is compared with dual-hop single antenna systems and regenerative i.e. decode and forward (DF) dual-hop MIMO system. We show that MAF MIMO systems achieve significantly lower bit error probability then dual-hop single-antenna systems and comparable performance with DF systems. The performance gap increases with usage of dual antenna in relay and the receiver. The OP performances of these systems are compared with single-antenna dual-hop and dual-antenna single-hop systems. We show significant improvement of OP performance compared to single-antenna dual-hop and comparable performance with dual-antenna singlehop systems.
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