Institute for Telecommunication Sciences
the research laboratory of the National Telecommunications and Information Administration

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


To request a reprint of this report, contact:

Lilli Segre, Publications Officer
Institute for Telecommunication Sciences
(303) 497-3572
lsegre@ntia.doc.gov

For technical information concerning this report, contact:

Jeffery A. Wepman
Institute for Telecommunication Sciences
(303) 497-3165
jwepman@ntia.doc.gov


Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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