In support of NIST's mission, we work collaboratively with Industry and several modeling tool vendors that are using NIST high quality measurement data to refine their models.
As part of the Telecom Infra Project (TIP) millimeter-wave network group activities, and using the Terragraph* 60 GHz phased-array channel sounder, the NIST team conducted an extensive measurement campaign on our Gaithersburg campus, to study signal propagation through trees. Measurement results were shared with modeling tool vendors and resulted several contributions to Recommendation ITU-R P.833-10 . Our 28 GHz urban channel measurements were used for the validation and calibration of ray-tracing with diffuse scattering . We are also sharing human blockage results with modeling tool vendors, in order to tune their models for the human body against our measurements.
“Ansys’ 5G collaboration with NIST to validate the HFSS Shooting and Bouncing Ray (SBR)* technology in a study of signal attenuation due to vegetation and foliage demonstrated extremely tight correlation between HFSS SBR+ and actual measurements. Yielding excellent fidelity compared to existing physical channel modeling techniques, these physics-based propagation models can be confidently used as a basis to develop advanced stochastic channel models in 5G and 6G technologies. Such partnerships are invaluable in delivering the next generation of 5G networks in a timely, efficient, and cost-effective manner.”
John Lee, Ansys, Inc. VP and GM Electronics and Semiconductors Business Unit
More details about our work with modeling tool vendors can be found in the references below:
 “Attenuation in vegetation,” International Telecommunication Union, Recommendation ITU-R P.833-10, Section 3.2.3 "Seasonal effects on single trees at 60.5 GHz", Sept. 2021.
 R. Charbonnier, C. Lai, T. Tenoux, D. Caudill, G. Gougeon, J. Senic, C. Gentile, Y. Corre, J. Chuang, N. Golmie, "Calibration of Ray-Tracing With Diffuse Scattering Against 28-GHz Directional Urban Channel Measurements," IEEE Trans. on Vehicular Technology, vol. 69, no. 12, pp. 14264-14276, Dec. 2020. https://ieeexplore.ieee.org/document/9262930
*Any product or brand name mentioned on this page does not constitute an endorsement by NIST.