This is another in a series of NIST technical notes (TN) on propagation of radio signals for emergency-responder communications. This report describes measurements conducted in the urban environment with a vector network analyzer (VNA). The VNA yielded samples of the channel frequency response for multiple transmitter and receiver locations, and from these frequency responses (or channel transfer functions), channel impulse responses were derived. The channel impulse responses were analyzed and delay dispersion statistics were gathered for two types of channels- those with a line of sight...

The National Institute of Standards and Technology (NIST) has been involved in a multi-year project to support the development of performance metrics and test methods for radio-frequency (RF)-based electronic safety equipment used by the public safety community. The work reported here focuses on side-by-side measurements of radio-propagation environment characteristics and actual wireless-device performance in representative emergency responder environments.