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Moment-Based Parameter Estimation for the Γ-Parameterized TWDP Model
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DOI：10.3390/s22030774.png)
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Abstract
En 中文
Two-wave with diffuse power (TWDP) is one of the most promising models for description of a small-scale fading effects in the emerging wireless networks. However, its conventional parameterization based on parameters K and & UDelta; is not in line with model's underlying physical mechanisms. Accordingly, in this paper, we first identified anomalies related to usage of conventional TWDP parameterization in moment-based estimation, showing that the existing & UDelta;-based estimators are unable to provide meaningful estimates in some channel conditions. Then, we derived moment-based estimators of recently introduced physically justified TWDP parameters K and & UGamma; and analyzed their performance through asymptotic variance (AsV) and Cramer-Rao bound (CRB) metrics. Performed analysis has shown that & UGamma;-based estimators managed to overcome all anomalies observed for & UDelta;-based estimators, simultaneously improving the overall moment-based estimation accuracy.
Keywords:
TWDP fading channel
moment-based estimation
Cramer-Rao bound
asymptotic variance
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