Abstract

The multiple-input multiple-output (MIMO) cooperative networks with selective orthogonal frequency division multiplexing access (OFDMA) relaying, where transmit beamforming and maximum ratio combining are carried out at source transmission and destination reception, respectively, are considered. The closed-form expression of outage probability is investigated to statistically assess the performance of systems. The impact of number of relays on the outage performance under arbitrary Nakagmi-m fading channels is analysed. Results reveal that increasing the number of relays is not always necessary for the improvement of outage performance and there has been the right relay configuration to guarantee the outage performance and reduce the complexity for relay networks.

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