Moment-Based Parameter Estimation for the Γ-Parameterized TWDP Model

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 [Formula: see text] 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 [Formula: see text]-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 [Formula: see text] and analyzed their performance through asymptotic variance (AsV) and Cramer–Rao bound (CRB) metrics. Performed analysis has shown that [Formula: see text]-based estimators managed to overcome all anomalies observed for [Formula: see text]-based estimators, simultaneously improving the overall moment-based estimation accuracy.