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

Peter B. Papazian; David L. Jones; Richard H. Espeland

Abstract: Wideband propagation measurements were made in a pecan orchard in Texas during April and August of 1990 to examine the propagation characteristics of millimeter–wave signals through vegetation. Measurements were made on tree obstructed paths with and without leaves. The study presents narrowband attenuation data at 9.6 and 28.8 GHz as well as wideband impulse response measurements at 30.3 GHz. The wideband probe (Violette et al., 1983), provides amplitude and delay of reflected and scattered signals and bit–error rate. This is accomplished using a 500 MBit/sec pseudo–random code to BPSK modulate a 28.8 GHz carrier. The channel impulse response is then extracted by cross correlating the received pseudo–random sequence with a locally generated replica.

Keywords: impulse response; attenuation; wideband; vegetation; delay spread; millimeter-wave propagation


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:

Peter B. Papazian
Institute for Telecommunication Sciences
(303) 497-5369
ppapazian@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.

Back to Search Results