  This paper contains measured data and empirical models for 2.5 & 60 GHz
in-building propagation path loss and multipath delay spread. Path loss
measurements were recorded using a broadband sliding correlator channel sounder
which recorded over 39,000 Power Delay Profiles (PDPs) in 22 separate locations
in a modern office building. Transmitters and receivers were separated by
distances ranging from 3.5 to 27.4 meters, and were separated by a variety of
obstructions, in order to create realistic environments for future
single-cell-per-room wireless networks. Path loss data is coupled with
site-specific information to provide insight into channel characteristics.
These measurements and models may aid in the development of future in-building
wireless networks in the unlicensed 2.4 GHz and 60 GHz bands.
