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Sensors 2016, 16(7), 1014; doi:10.3390/s16071014

Joint Parameter Estimation for the Two-Wave with Diffuse Power Fading Model

Departamento de Ingeniería de Comunicaciones, ETS Ingeniería de Telecomunicación, Universidad de Málaga, Málaga 29071, Spain
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Academic Editor: Leonhard M. Reindl
Received: 14 April 2016 / Revised: 23 June 2016 / Accepted: 25 June 2016 / Published: 30 June 2016
(This article belongs to the Section Sensor Networks)
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Abstract

Wireless sensor networks deployed within metallic cavities are known to suffer from a very severe fading, even in strong line-of-sight propagation conditions. This behavior is well-captured by the Two-Wave with Diffuse Power (TWDP) fading distribution, which shows great fit to field measurements in such scenarios. In this paper, we address the joint estimation of the parameters K and Δ that characterize the TWDP fading model, based on the observation of the received signal envelope. We use a moment-based approach to derive closed-form expressions for the estimators of K and Δ, as well as closed-form expressions for their asymptotic variance. Results show that the estimation error is close to the Cramer-Rao lower bound for a wide range of values of the parameters K and Δ. The performance degradation due to a finite number of observations is also analyzed. View Full-Text
Keywords: Cramer-Rao bound; moment-based estimation; fading channels; Rician fading; Two-Wave with diffuse power Cramer-Rao bound; moment-based estimation; fading channels; Rician fading; Two-Wave with diffuse power
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lopez-Fernandez, J.; Moreno-Pozas, L.; Lopez-Martinez, F.J.; Martos-Naya, E. Joint Parameter Estimation for the Two-Wave with Diffuse Power Fading Model. Sensors 2016, 16, 1014.

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