Journal ArticleDOI
Path loss, delay spread, and outage models as functions of antenna height for microcellular system design
TLDR
The results presented in this paper provide insight into the statistical distributions of measured path loss by showing the validity of a double regression model with a break point at a distance that has first Fresnel zone clearance for line-of-sight topographies.Abstract:
This paper presents results of wide-band path loss and delay spread measurements for five representative microcellular environments in the San Francisco Bay area at 1900 MHz. Measurements were made with a wide-band channel sounder using a 100-ns probing pulse. Base station antenna heights of 3.7 m, 8.5 m, and 13.3 m were tested with a mobile receiver antenna height of 1.7 m to emulate a typical microcellular scenario. The results presented in this paper provide insight into the statistical distributions of measured path loss by showing the validity of a double regression model with a break point at a distance that has first Fresnel zone clearance for line-of-sight topographies. The variation of delay spread as a function of path loss is also investigated, and a simple exponential overbound model is developed. The path loss and delay spread models are then applied to communication system design allowing outage probabilities, based on path loss or delay spread, to be estimated for a given microcell size. >read more
Citations
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Proceedings ArticleDOI
A 38 GHz cellular outage study for an urban outdoor campus environment
TL;DR: These measurements demonstrate the viability of directional antennas and site-specific planning for future mm-wave cellular, and show that cell radii of ~200 M will provide a very high probability of coverage in an urban environment.
Journal ArticleDOI
Wideband measurements of angle and delay dispersion for outdoor and indoor peer-to-peer radio channels at 1920 MHz
TL;DR: Durgin et al. as discussed by the authors presented spatio-temporal measurements for the peer-to-peer radio channel at a center frequency of 1920 MHz with 140 MHz of radio-frequency bandwidth.
Proceedings ArticleDOI
Antenna Isolation, Wideband Multipath Propagation Measurements, and Interference Mitigation for On-frequency Repeaters
Christopher R. Anderson,S. Krishnamoorthy,Christopher G. Ranson,T.J. Lemon,W.G. Newhall,T. Kummetz,Jeffrey H. Reed +6 more
TL;DR: In this article, the authors present antenna isolation and wideband power delay profile measurement results for typical on-frequency repeater installations, as well as simulation results from a novel adaptive filtering approach that allows repeaters to operate with gains equal to or greater than the existing isolation.
Proceedings ArticleDOI
Path Loss, Shadow Fading, and Line-Of-Sight Probability Models for 5G Urban Macro-Cellular Scenarios
Shu Sun,Timothy A. Thomas,Theodore S. Rappaport,Huan X. Nguyen,Istvan Z. Kovacs,Ignacio Rodrigue +5 more
TL;DR: In this article, the authors present key parameters including the line-of-sight (LOS) probability, large-scale path loss, and shadow fading models for the design of future 5G wireless communication systems in urban macrocellular (UMa) scenarios, using the data obtained from propagation measurements at 38 GHz in Austin, US, and at 2, 10, 18, and 28 GHz in Aalborg, Denmark.
Journal ArticleDOI
Providing location security in vehicular Ad Hoc networks
TL;DR: In this article, a number of location information security mechanisms for VANETs are presented, which meet the requirements of the Confidentiality, Integrity, and Availability (CIA) information security model.
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The Effects of Time Delay Spread on Portable Radio Communications Channels with Digital Modulation
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