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• W2050861008 abstract "Practical mobile communication systems suffer from time-variant channel fading and cochannel interference, both of which give rise to challenges concerning strategy design and performance analysis in wireless relay networks. Although these two aspects have attracted concerns in recent studies, most researchers still focused on dealing with a single problem and avoided intricate joint considerations. In this paper, we investigate the cooperative strategies for the communications of two cochannel pairs over time-correlated Rayleigh channels, and the system consists of a relay-assisted pair (Pair 1) along with a direct transmission pair (Pair 2). We begin with a theoretical evaluation on a conventional relay selection (RS) algorithm that maximizes outdated signal-to-interference-plus-noise ratio (M-SINR), and then develop a more sophisticated method that involves extra statistical and interference information based on the concept of minimizing outage probability (MOP). Closed-form outage probability expressions are derived for both pairs with each RS algorithm, and the MOP-type selection is confirmed to outperform M-SINR in robustness against channel fluctuation when the network operates on medium-to-high signal-to-noise ratio (SNR). Implementation issues of the RS methods are discussed to clarify their overhead and to support their practicability. Further, an interference control scheme is proposed to guarantee Pair 2 communication quality under either RS algorithm by disqualifying the relays that probably cause severe cochannel interference to Pair 2. The interference control mechanism is carried out via a novel threshold parameter ε that represents the tolerance of outage performance degradation of Pair 2 resulting from interference. The closed-form analysis validates that the given ε is rational for an arbitrary network scenario, and it can balance the two pairs' outage behavior under a proper configuration. We reveal the influence of factors such as average SNR, transmit rate, and network topology on system performance to make a comprehensive comparison between diverse cooperative strategies." @default.
• W2050861008 created "2016-06-24" @default.
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• W2050861008 date "2013-09-01" @default.
• W2050861008 modified "2023-09-23" @default.
• W2050861008 title "Cooperative Strategies for Wireless Relay Networks With Cochannel Interference Over Time-Correlated Fading Channels" @default.
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• W2050861008 doi "https://doi.org/10.1109/tvt.2013.2242911" @default.
• W2050861008 hasPublicationYear "2013" @default.
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