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Assuming an opportunistic source selection strategy, a tight closed-form approximation for the outage probability of fixed-gain bidirectional cooperative networks is derived. The presented analysis allows for independent, reciprocal Nakagami-m fading channels with distinct fading parameters among the links. Simulation results are presented to corroborate the tightness of the proposed approximations.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2010.2054
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