Site-Level Deterministic Channel Emulator: Grid-based Architecture and Continuous Channel Emulation Technique

Deterministic channel emulator applicable in both static and dynamic scenarios are essential for testing a performance of a large-scale wireless communication system, such as cyber-physical system, with high accuracy. Despite providing a better accuracy than a stochastic approach, deterministic channel simulation such as ray tracing (RT) is time-consuming especially in the dynamic scenario. Therefore, implementing such deter-ministic approach in the channel emulator is challenging due to hardware constraint and real-time computation requirement. In this paper, a grid-based architecture is proposed as an alternative approach to realize the deterministic channel emulator. Here, RT is utilizing to only generate spatial channel parameters at specific grid node and stores in the emulator database. Then, continuous time-variant channel of a moving mobile station is synthesized by interpolating parameters of the tapped delay line channel at neighbor grid nodes, which has been converted from the spatial ones. Basic building-block of the proposed architecture and challenges will be addressed in the paper.