Outage optimality of opportunistic amplify-and-forward relaying
نویسندگان
چکیده
منابع مشابه
Outage Performance of Opportunistic Amplify-and-Forward Relaying over Asymmetric Fading Environments
This letter analyzes the outage probability of opportunistic amplify-and-forward relaying over asymmetric and independent but non-identically distributed (i.n.d) fading environments. The work investigates the scenarios where cooperative nodes are located at different geographical locations. As a result, the different signals are affected by different i.n.d fading channels, one may undergo Ricia...
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Rayleigh fading channels is theoretically derived. Numerical results validate our theoretical analysis and show that by introducing overhearing among relays, the outage performance of the system can be greatly improved. It also shows that there is a trade-off between system sum outage capacity and the transmitted number of symbols.
متن کاملPower Allocation for Amplify-and-Forward Opportunistic Relaying Systems
In this letter, power allocation methods are devised for Amplify-and-Forward (AF) opportunistic relaying systems aiming at minimizing the outage probability. First, we extend the result on outage probability in [8] and develop an approximate expression to simplify the power allocation problem. A corresponding optimization problem is constructed and proved to be convex. Then an iterative numeric...
متن کاملOverview of Amplify- and-Forward Relaying
Cooperative diversity has emerged as a promising technique to combat fading in wireless communications (Sendonaris et. al., 2003a; Sendonaris et. al., 2003b). It is based on the broadcast nature of the wireless medium and enables single-antenna users to “enjoy” space diversity benefits by sharing their physical resources through a virtual transmit and/or receive antenna array. The basic relay c...
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Resumo—Este artigo investiga o desempenho de outage de sistemas cooperativos amplifica-e-encaminha (AF) de dois saltos em um ambiente de desvanecimento Nakagami-m limitado por interferência. Mais especificamente, assumindo a presença de múltiplos interferentes Nakagami-m no relay AF e um terminal destino ruidoso, aproximações simples e em forma fechada para a probabilidade de outage fim-a-fim s...
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ژورنال
عنوان ژورنال: IEEE Communications Letters
سال: 2007
ISSN: 1089-7798
DOI: 10.1109/lcomm.2007.061589