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Cooperative diversity is a promising solution in wireless distributed networks where integrating multiple antennas onto small mobile devices is practically impossible due to size and cost constraints. As such, we consider a cooperative diversity network where the source and the destination user-pair are equipped with single antennas while the relay is a wireless access point equipped with N antennas...
This paper advocates the performance of wireless multiuser relay networks (MRNs) equipped with a single amplify-and-forward (AaF) relay. For such networks, we focus on opportunistic scheduling, in which the destination with the highest instantaneous end-to-end signal-to-noise ratio (SNR) is scheduled for transmission. The scheduled destination can receive either directly from the source or indirectly...
Cooperative diversity methods are used to increase network throughput while considering fairness. By using these methods in OFDMA relay-enhanced systems, the best transmission link between direct transmission link and decode-and-forward relaying link is selected dynamically. In this paper, we improved the resource allocation algorithms introduced by Wang et. al. by proposing two new decision criteria...
We derive new exact closed-form expressions for the symbol error rate (SER) of cooperative selection diversity (CSD) with amplify-and-forward (AF) transmission using channel-state-information (CSI)-based gain relaying. We consider the general fading condition of independent but not necessarily identically distributed (i.n.d.) Nakagami-m fading. We also present a closed-form expression for i.n.d. Rayleigh...
We present new exact closed-form expressions for the symbol error rate (SER) of cooperative selection diversity (CSD) with a single fixed gain amplify-and-forward (AF) relay. We consider the general fading condition of independent but not necessarily identically distributed (i.n.d.) Nakagami-m fading. We also present a closed-form expression for i.n.d. Rayleigh fading as a special case. We highlight...
The channel statistics are analyzed and evaluated for cooperative selection diversity with an amplify-and-forward (A&F) relay over Rayleigh fading channels. The average level crossing rate (LCR) and average fade duration (AFD) of the signal envelope for the dual-hop path and the cooperative selection diversity are evaluated. The moment generating function (MGF) of the signal-to-noise-ratio (SNR)...
The level crossing rate (LCR) and average fade duration (AFD) are derived and evaluated for Rayleigh fading relay channels with cooperative selection diversity, where the transmission via a dual-hop branch is also addressed. In addition, the outage probability of the signal envelope with selection combining is analyzed. Numerical results of the LCR and the AFD are presented for the comparison of the...
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