Hybrid Clarke's Models for Fixed Wireless Deployments in Beyond-5G Systems

Integrated Sensing and Communication (ISAC) has lately been highlighted as a critical enabler for B5G/6G wireless communication. Nevertheless, appropriate channel models that support communication and sensing are one of the main bottlenecks for efficient deployment of ISAC systems. This work addresses the problem of modelling multipath fading channels for ISAC systems for fixed wireless networks with mobile scatterers. We first highlight the limitations of existing models for multipath fading, namely, Jake's and Clarke's models. We then propose a Hybrid Clarke's model where we leverage the fact that all multipaths are not affected by the motion of the mobile scatterers. We then use the proposed channel model to evaluate a Doppler-based intruder detection system. Through various simulation results, we will showcase that the proposed channel model can effectively detect the intruder.