Prediction of Time Variant Spatial Channel Impulse Responses for Wireless Ad-hoc Networks

With the growing demand for wireless communication systems, wireless concepts for the data exchange in time variant ad-hoc networks become more and more interesting. In order to describe and thus assess the mobile radio channels in such networks, simulations are required. The main aspect is the time-variance of the channel impulse response and the modeling of large scenarios. This paper discusses the demands for a model to describe the radio channel in time variant environments and presents an appropriate ray tracing approach. A new concept is introduced to substitute complex polygonal objects by several radar cross sections. The performance of the Ray Tracing algorithm is demonstrated by a comparison from predictions to measured channel characteristics.