Relay Selection in the FAF Relaying M2M Cooperative Systems
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چکیده
The approximate average symbol error probability (ASEP) and outage probability (OP) of the multiple-mobile-relay-based mobile-to-mobile (M2M) cooperative systems with fixed-gain amplify-andforward (FAF) relaying and relay selection over N-Nakagami fading channels is investigated in this paper. The cumulative density function (CDF) of the signal-to-noise ratio (SNR) is used to derive the exact ASEP expressions for various modulations. Exact closed-form expressions for OP are also presented. The power allocation problem is formulated for performance optimization. Then the ASEP and OP performance under different conditions is evaluated through numerical simulations to verify the analysis. The simulation results showed that the number of mobile relay nodes, the fading coefficient, the number of cascaded components, the relative geometrical gain, and the power-allocation parameter have an important influence on the ASEP and OP performance. Key-Words: M2M communications; N-Nakagami fading channels; cumulative density function; average symbol error probability; outage probability; relay selection
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تاریخ انتشار 2015