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The diversity gain function is a unified metric for the asymptotic error performance of wireless communication systems. In this correspondence, we propose a theorem that relates the diversity gain function and the coding gain to the probability density function of the instantaneous signal-to-noise ratio (SNR) at the origin. It provides a general framework for analyzing the asymptotic reliability of...
In this paper, we consider a relay system with a number of potential relay nodes. We propose several relay assignment protocols to select a relay node to help transmit source data so that the average outage probability of the system is reduced. These protocols include: Optimal-Position relay assignment, Nearest-Optimal-Position relay assignment, and Left (Right)-Nearest-Optimal-Position relay assignment,...
Cooperative diversity techniques make a reduction in spectral efficiency despite of an increase in reliability. In this paper we propose a novel relaying protocol in a cooperative network with decode and forward (DF) relays to improve the spectral efficiency in addition to achieving full diversity order (maximum available reliability). The proposed protocol keeps the transmission rate fixed to the...
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