We introduce and characterize a natural generalization of the Two-Wave with Diffuse Power (TWDP) fading model, by allowing that the incident waves arrive in different clusters. The newly proposed model, referred to as the Multi-cluster Two-Wave (MTW) fading model, generalizes both the TWDP and the kappa-mu models under a common umbrella. The special case on which the model parameters reach extreme values is also analyzed, aimed to model harsh fading conditions reported in experimental measurements obtained in enclosed environments. The chief probability functions of both the MTW and the MTW Extreme fading models are obtained, including the probability density function, the cumulative distribution function and the generalized moment-generating function. A number of applications for these models are exemplified, including outage probability in interference-limited scenarios, energy detection, and composite fading modeling.

翻译：我们引入并描述了一种对双波漫射功率（TWDP）衰落模型的自然推广，允许入射波在不同集群中到达。新提出的模型称为多集群双波（MTW）衰落模型，在统一框架下推广了TWDP模型和κ-μ模型。此外，还分析了模型参数达到极值时的特殊情形，旨在模拟在封闭环境中实验测量所报告的恶劣衰落条件。我们推导了MTW和MTW极端衰落模型的主要概率函数，包括概率密度函数、累积分布函数和广义矩生成函数。这些模型的应用示例包括干扰受限场景的中断概率、能量检测以及复合衰落建模。