Journal ArticleDOI
800-MHz attenuation measured in and around suburban houses
TLDR
These measurements are needed in refining the requirements for portable-radio communication systems that can accommodate low-power radiotelephone sets and large-scale distributions of the small-scale signal medians are approximately log normal.Abstract:
The signal levels around and within eight suburban houses were measured at 800 MHz. These measurements are needed in refining the requirements for portable-radio communication systems that can accommodate low-power radiotelephone sets. The measurements were made from an instrumentation van having an erectable 27-foot-high antenna. Large-scale distributions of the small-scale signal medians are approximately log normal. The decrease in median signal level with distance ranges from d−3 to d−6.2 for the eight houses. Signal decreases as d−4.5 for the overall data set. At 1000 feet, regressions to signal levels range from 12.5 to 37.1 dB below free-space propagation levels for locations outside and locations inside on first and second floors. In basements, regression levels at 1000 feet range from 29 to 48.2 dB below free space. For the overall data set, regression signal levels at 1000 feet are 27.7 dB below free space. For all the basements, this value is 39.6 dB. Other signal statistics are given in this paper.read more
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914 MHz path loss prediction models for indoor wireless communications in multifloored buildings
TL;DR: In this article, the authors developed site-specific models based on the number of floors, partitions, and concrete walls between the transmitter and receiver, and provided simple prediction rules which relate signal strength to the log of distance.
References
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Journal ArticleDOI
Radio propagation within buildings at 900 MHz
TL;DR: In this paper, a survey of the propagation of radio signals at 900 MHz within buildings for the operation of cordless telephones is presented, where histograms are presented of signal strength together with computed values for bit error ratio for digital FSK modulation.
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Measurements of 800-MHz radio transmission into buildings with metallic walls
TL;DR: An experiment to measure 800-MHz attenuation into buildings is described, finding that small-scale signal envelope variations are approximately Rayleigh distributed and that large-scale distributions of the small- scale signal medians are approximately log-normal.
Journal ArticleDOI
Attenuation of 900 MHz radio waves propagating into a metal building
H. Hoffman,David Cox +1 more
TL;DR: In this paper, the attenuation of radio waves propagating into buildings is a crucial factor in the feasibility and design of portable radio telephone systems, and signal levels were measured inside a steel shell building at 900 MHz.
Journal ArticleDOI
Multipath delay spread and path loss correlation for 910-MHz urban mobile radio propagation
TL;DR: In this paper, the authors present data indicating a low correlation between delay spread and path loss at 910 MHz for 100 small areas within a 2 × 2 ½-km region.