Error Analysis of Fixed Gain AF Relaying with MRC over Nakagami m Fading Channels
This article investigates the error performance of wireless communication systems that employ binary mod ulations and Amplify and Forward (AF) relaying over flat Nakagami m faded links with maximum ratio combining (MRC) at destination. Specifically, we derive a simple yet accurate closed form approximation for the average bit er ror probability (ABEP) and closed form expressions for its tight upper and lower bounds. The eect of power imbalance between the relayed links is also studied. Numerical investi gations show good agreement between proposed theoretical resultsandsimulationswhereasourperformanceboundsare shown to be tighter than previously proposed bounds for the case of unbalanced relayed links.