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Propagation measurements for satellite radio reception inside buildingsSwept CW signals (from 700 to 1800 MHz) were received inside six buildings of brick, corrugated sheet-metal, wood-frame, mobile-home, and reinforced concrete-wall construction. A transmitter antenna was mounted outdoors on top of an 18 m tower to simulate a satellite, and a linearly scanned directional receiver antenna was used to probe the spatial, spectral, and temporal variability of the signal indoors. Levels were found to have much structure in the spatial and frequency domain, but were relatively stable in time. Typically, people moving nearby produced variations of less than 0.5 dB, whereas a person blocking the transmission path produced fades of 6 to 10 dB. Severe losses (17.5 dB) were observed in the concrete-wall building, which also exhibited the longest multipath delays (over 100 ns). Losses inside a mobile home were even larger (over 20 dB) and were independent of antenna orientation. The power-frequency distortion increased with the logarithm of the bandwidth, but could be reduced by moving to a position of higher power. Only the losses showed a clear frequency dependence, but they could be mitigated by moving the antenna.
Document ID
19940033618
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Vogel, Wolfhard J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Torrence, Geoffrey W.
(Texas Univ. Austin, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Publication Information
Publication: IEEE Transactions on Antennas and Propagation
Volume: 41
Issue: 7
ISSN: 0018-926X
Subject Category
Communications And Radar
Accession Number
94A10273
Funding Number(s)
CONTRACT_GRANT: JPL-956520
Distribution Limits
Public
Copyright
Other

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