Calibration of Ray-Tracing with Diffuse Scattering against 28-GHz Directional Urban Channel Measurements
Camillo Gentile, Jelena Senic, Chiehping Lai, Derek Caudill, Jack Chuang, Nada Golmie
This paper describes the calibration of the Volcano ray-tracing engine against channel measurements collected in an urban environment with a 28 GHz directional channel sounder. Channel multi-path components were extracted from the measurements in the delay and 3D angle- of-arrival domains through super-resolution techniques, with average errors of 0.55 ns and 2.05° respectively. The extracted components were then tracked over space as the receiver - mounted a mobile robot equipped with military-grade GPS for precision localization - traversed a total distance of 66 m while amassing a total of 488 measurements. Given the GIS database of the environment, the tracked components were then mapped to the ambient objects - objects that generated the components through specular reflection or diffuse scattering. The mapping permitted object-specific calibration, namely distinct diffuse-scattering models for buildings, vehicles, and foliage. To our knowledge, this is the first effort to calibrate ray-tracing with object-specific diffuse scattering models against individual multi-path components mapped in the delay, angle, and space domains. Results, in terms of calibrated ray-tracing parameters, fit-error statistics, and observations along the way, are included.
, Senic, J.
, Lai, C.
, Caudill, D.
, Chuang, J.
and Golmie, N.
Calibration of Ray-Tracing with Diffuse Scattering against 28-GHz Directional Urban Channel Measurements, IEEE Transactions on Vehicular Technology, [online], https://doi.org/10.1109/TVT.2020.3038620
(Accessed July 25, 2021)