DocumentCode :
978870
Title :
Radio propagation characteristics for line-of-sight microcellular and personal communications
Author :
Xia, Howard H. ; Bertoni, Henry L. ; Maciel, Leandro R. ; Lindsay-Stewart, Andrew ; Rowe, Robert
Author_Institution :
Telesis Technol. Lab., Walnut Creek, CA, USA
Volume :
41
Issue :
10
fYear :
1993
fDate :
10/1/1993 12:00:00 AM
Firstpage :
1439
Lastpage :
1447
Abstract :
To acquire a knowledge of radio propagation characteristics in the microcellular environments for personal communications services (PCS), a comprehensive measurement program was conducted by Telesis Technologies Laboratory (TTL) in the San Francisco Bay area using three base station antenna heights of 3.2 m, 8.7 m, and 13.4 m and two frequencies at 900 MHz and 1900 MHz. Five test settings were chosen in urban, suburban, and rural areas in order to study propagation in a variety of environments. This paper reports the LOS measurements in different environments, all of which show variations of signal strength with distance that have distinct near and far regions separated by a break point. It was also found that the location of the break point for different frequencies and antenna heights can be calculated based on first Fresnel zone clearance. The regression analysis reveals a slope that is less than two before the break point, while it is greater than two after the break point. This break distance can be used to define the size of microcell and to design for fast hand-off. Beyond the first Fresnel zone break distance the base station antenna height gain was observed to approximately follow the square power law of antenna height
Keywords :
cellular radio; loss measurement; personal communication networks; radio links; radiowave propagation; statistical analysis; 13.4 m; 1900 MHz; 3.2 m; 8.7 m; 900 MHz; LOS measurements; PCS; San Francisco Bay; Telesis Technologies Laboratory; UHF; base station antenna heights; break distance; distance; first Fresnel zone clearance; frequencies; line-of-sight microcellular link; measurement program; personal communications services; radio propagation; regression analysis; rural areas; signal strength; suburban areas; urban areas; Antenna measurements; Antennas and propagation; Area measurement; Base stations; Frequency measurement; Fresnel reflection; Personal communication networks; Radio propagation; Regression analysis; Testing;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/8.247785
Filename :
247785
Link To Document :
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