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Wireless Personal Communications
Published in: Wireless Personal Communications 4/2014

01-08-2014

Performance Analysis of Cooperative Underlay Cognitive Networks with Channel Estimation Error

Author: Khuong Ho-Van

Published in: Wireless Personal Communications | Issue 4/2014

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Abstract

Channel information (CI) plays an important role in system design optimization. It is obtained through channel estimation process and hence, inevitably imperfect at a certain degree. Numerical evaluation of the outage performance of cooperative underlay cognitive networks under the presence of channel estimation error has been left open. This paper heals this literature gap with the proposal of a precise outage probability expression. Various results show the excellent match between analysis and simulation, and the advantage of the derived expression in studying the effect of CI imperfection on system performance.
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Footnotes
1
In this paper, unlicensed/licensed and secondary/primary are interchangeable.
 
2
Difference between multi-hop communication (e.g., [3, 5]) and cooperative one (e.g., [6‐9]) is that the former does not consider the direct communication link between the source and the destination while for improved spatial diversity, the latter does.
 
3
Channel coefficient reflects the severe effect of fading channel on transmitted signals.
 
4
Channel estimation is not the main objective of this paper. As such, this setting of \(\zeta _{a,p}\) is only a solution to illustrate the impact of channel estimation error on the performance of cooperative underlay cognitive networks.
 
5
Simulated results are achieved with \(10^7\) channel realizations.
 
6
It is noted that the quality of the channel estimator depends on the number of pilot symbols. The higher number of pilot symbols, the better quality of the channel estimator and the larger transmission bandwidth loss.
 
Literature
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Goldsmith, A., Jafar, S. A., Maric, I., & Srinivasa, S. (2009). Breaking spectrum gridlock with cognitive radios: An information theoretic perspective. Proceedings of the IEEE, 97, 894–914.CrossRef
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Lee, J., Wang, H., Andrews, J. G., & Hong, D. (2011). Outage probability of cognitive relay networks with interference constraints. IEEE Transactions on, Wireless Communications, 10, 390–395.CrossRef
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Nosratinia, A., Hunter, T. E., & Hedayat, A. (2004). Cooperative communication in wireless networks. IEEE Communications Magazine, 42, 74–80.CrossRef
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Caijun, Z., Ratnarajah, T., & Kai-Kit, W. (2011). Outage analysis of decode-and-forward cognitive dual-hop systems with the interference constraint in Nakagami-m fading channels. IEEE Transactions on Vehicular Technology, 60, 2875–2879.CrossRef
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Yan, Z., Zhang, X., & Wang, W. (2011). Exact outage performance of cognitive relay networks with maximum transmit power limits. IEEE Communications Letters, 15, 1317–1319.CrossRef
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Ho-Van, K. (2012). Exact outage probability of underlay cognitive cooperative networks over Rayleigh fading channels. Wireless Personal Communications. doi:10.​1007/​s11277-012-0742-z.
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Liping, L., Ping, Z., et al. (2011). Outage performance for cognitive relay networks with underlay spectrum sharing. IEEE Communications Letters, 15, 710–712.CrossRef
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Guo, Y., Kang, G., et al. (2010). Outage performance of relay-assisted cognitive-radio system under spectrum-sharing constraints. Electronics Letters, 46, 182–184.CrossRef
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Metadata
Title
Performance Analysis of Cooperative Underlay Cognitive Networks with Channel Estimation Error
Author
Khuong Ho-Van
Publication date
01-08-2014
Publisher
Springer US
Published in
Wireless Personal Communications / Issue 4/2014
Print ISSN: 0929-6212
Electronic ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-014-1661-y

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