Efficient Ray Tracing post-processing schemes for UWB-IR channel simulation

RT (ray tracing) tools are commonly used to simulate UWB-IR (ultra wideband-impulse radio) propagation channel for different applications like network optimization, interference monitoring, or localization based applications. In this paper, different methods of reconstructing received signal in RT tools are presented, concluding that they are not all equivalent from digital implementation point of view. Moreover, the received time domain signal reconstruction is closely related to computational complexity, simulation speed, estimation errors, required signal resampling etc. Approaches for performing received signal encompass hybrid time-frequency domain and need special care in choosing which specific pre-processing steps have to be executed in time-domain and which have to be executed in frequency-domain. Since there are advantages to both spectral and temporal approaches, the two methods must be efficiently combined, in order to be able to take advantage of the best features of each.