Industrial Wireless Systems: Radio Propagation Measurements

Radio frequency (RF) propagation measurements were conducted at three facilities representing a crosssection of different classes of industrial environments. Selected sites included a multi-acre transmission assembly factory typical of the automotive industry; a small-sized machine shop primarily engaged in met­ alworking located on the NIST campus in Gaithersburg; and a steam generation plant located on the NIST campus in Boulder. A spread spectrum correlation sounder was used to take the measurements at a con­ tinuum of points throughout the facility by fixing the transmitter and moving the receiver at a constant rate throughout each facility. We analyzed the data collected from the RF propagation measurements of each site. Analysis is based on channel impulse response (CIR) measurements collected during the measurement using equipment developed by the National Institute of Standards and Technology. The results of our analy­ sis include a tabulated summary and detailed exploration of various industry accepted channel metrics such as path loss, delay spread, and K factor. Our interpretation of the measurements contributes to an improved understanding of radio frequency propagation in factories and an additional perspective on deploying wire­ less communication devices within factories. The raw measurement data and analysis software are made freely available for public download. _____________________________________________________________________________________ This puication is avilable ree of carge rom : https://rg/10.6028/N IS T.TN .951 Courtesy of Analynk Wireless | (614) 755-5091 | www.analynk.com