Predicting the K-Factor of Divided Paths in Wideband Mobile Propagation

In order to design wideband mobile communication systems, we must analyze the multi-path propagation characteristics more accurately. The distribution of received power in mobile communication systems is well known to follow a Nakagami-Rice distribution with the key parameter being the K-factor. When the K-factor is set to 0, the Nakagami-Rice distribution equals a Rayleigh distribution. Wideband wireless systems can divide multi-paths into delay paths and improve the communication quality by combining the delay paths effectively. Therefore, in wideband mobile communication systems, it is more important to calculate the K-factor than the distribution of each delay path. In this paper, we clarify the relation between excess delay time and the K-factor of each delay path and introduce an empirical formula that predicts the K-factor as a function of excess delay time.