June 1994 | NTIA Technical Report TR-94-309
Jeffery Wepman; J. Randy Hoffman; Lynette H. Loew
Abstract: Mobile impulse response measurements were taken in the 1850-1990 MHz band in three different macrocellular (cell radii of 5 km) environments: flat rural, hilly rural, and urban high-rise. Spatial diversity with a 15-wavelength separation was employed by using a dual-channel receiver. All antennas were omnidirectional and vertically polarized. The data were analyzed to provide delay statistics; spatial diversity statistics; multipath power statistics; number of paths, path arrival time, and path power statistics; and correlation bandwidth statistics. The urban high-rise cell showed more multipath components (out to 4 or 5 µs in delay) than the rural cells. Very long delays (greater than 10 µs), while not seen often, were seen more frequently in the rural cells than in the urban high-rise cell. Parameters to help design a tapped delay model of the radio channel in the different environments are given.
Keywords: impulse response; multipath; channel model; correlation bandwidth; coherence bandwidth; power delay profiles; RMS delay spread; wideband measurements; arrival time; spatial diversity; tapped delay model
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Jeffery A. Wepman
Institute for Telecommunication Sciences
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