Moment-based Parameter Estimation for \({\Gamma}\)-parameterized TWDP Model

In this paper, parameterization of a two-wave with diffuse power (TWDP) fading model is revised. Anomalies caused by using conventional TWDP parameters \(K\) and \(\Delta\) are first identified, indicating that the existing moment-based estimators of a tuple \((K, \Delta)\) are not able to provide accurate estimations for various combinations of their values. Therefore, a moment-based estimators for a newly proposed parameters \(K\) and \(\Gamma\) are derived and analyzed through asymptotic variance (AsV) and Cramer-Rao bound (CRB) metrics. The results are qualitatively compared to those obtained for a \((K, \Delta)\) tuple, showing that moment-based estimators of the improved \(\Gamma\)-based parameterization managed to overcome all anomalies observed within the conventional TWDP parameterization.