Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Measurements to Support Modulated-Signal Radio Transmissions for the Public-Safety Sector



Catherine A. Remley, Galen H. Koepke, Christopher L. Holloway, Chriss A. Grosvenor, Dennis G. Camell, John M. Ladbury, Robert Johnk, David R. Novotny, William F. Young, George Hough, Michael McKinley, Yann Becquet, John Korsnes


We report on measurements of parameters utilized for characterization of broadband wireless technologies proposed for use by emergency responders (firefighters, police, and emergency medical personnel) and other public-safety personnel. We designed a collection of experiments in various large structures in an effort to quantify radio-signal attenuation, the level of multipath, and the amount of frequency-selective distortion. We also monitored the distortion introduced into digitally modulated signals under the orthogonal frequency division multiplexing access protocol. This report summarizes the experiments, performed in four large building structures. We describe the experiments and the measurement systems, and then show primary results of the data we collected in each of the four structures. Finally, we discuss some of the interesting propagation effects we observed and discuss how they may be classified into different propagation channel types. In the appendices, the complete sets of measured data are presented.
Technical Note (NIST TN) - 1546
Report Number


attenuation, broadband radio communications, building penetration, digital modulation, emergency responders, error vector magnitude, excess path loss, received power, time-delay spread, wireless signals, wireless system measurements, wireless telecommunications, ultrawideband signals, vector network analyzer, vector signal analyzer
Created April 1, 2008, Updated February 19, 2017