Selective cooperative relaying over time-varying channels
Michalopoulos DS, Lioumpas AS, Karagiannidis GK, Schober R (2010)
Publication Type: Journal article
Publication year: 2010
Journal
Book Volume: 58
Pages Range: 2402-2412
Article Number: 5497978
Journal Issue: 8
DOI: 10.1109/TCOMM.2010.062310.090065
Abstract
In selective cooperative relaying only a single relay out of the set of available relays is activated, hence the available power and bandwidth resources are efficiently utilized. However, implementing selective cooperative relaying in time-varying channels may cause frequent relay switchings that deteriorate the overall performance. In this paper, we study the rate at which a relay switching occurs in selective cooperative relaying applications in time-varying fading channels. In particular, we derive closed-form expressions for the relay switching rate (measured in Hz) for opportunistic relaying (OR) and distributed switch and stay combining (DSSC). Additionally, expressions for the average relay activation time for both of the considered schemes are also provided, reflecting the average time that a selected relay remains active until a switching occurs. Numerical results manifest that DSSC yields considerably lower relay switching rates than OR, along with larger average relay activation times, rendering it a better candidate for implementation of relay selection in fast fading environments. © 2010 IEEE.
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APA:
Michalopoulos, D.S., Lioumpas, A.S., Karagiannidis, G.K., & Schober, R. (2010). Selective cooperative relaying over time-varying channels. IEEE Transactions on Communications, 58(8), 2402-2412. https://doi.org/10.1109/TCOMM.2010.062310.090065
MLA:
Michalopoulos, Diomidis S., et al. "Selective cooperative relaying over time-varying channels." IEEE Transactions on Communications 58.8 (2010): 2402-2412.
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