DocumentCode :
3278142
Title :
Low Antenna Ultra Wideband Propagation Measurements and Modeling in a Forest Environment
Author :
Anderson, C.R. ; Volos, H.I. ; Headley, W.C. ; Müller, F. C B F ; Buehrer, R.M.
Author_Institution :
United States Naval Acad., Annapolis
fYear :
2008
fDate :
March 31 2008-April 3 2008
Firstpage :
1229
Lastpage :
1234
Abstract :
Over the past decade, research and development in wireless sensor networks has investigated novel and exciting applications for a number of different scenarios. Impulse ultra wideband (UWB) communications promises a number of benefits for use in wireless sensor networks-particularly in forest environments where it can provide robust operation along with the ability to combine communications with precision position location. In this paper, we present measurement results and empirical models for impulse ultra wideband (UWB) propagation in a forest environment. Path loss measurements were performed using a 620 picosecond duration UWB pulse, and over 14000 measurements were recorded in 93 different locations in four different forest environments: light brush, light, medium, and dense forest. Transmitters and receivers were separated by distances ranging from 4 to 50 meters. Path loss exponents were found to range from 2.2-4.3, depending on the antenna and forest density; results which are in agreement with the few existing broadband forest propagation studies presented in the literature. Small-scale fading analysis indicated that UWB signals experience Rician fading, with K-factors in the range of 8-24 dB. These measurements and models should aid in the development of future UWB outdoor sensor networks.
Keywords :
Rician channels; electromagnetic wave propagation; forestry; radio receivers; radio transmitters; ultra wideband antennas; ultra wideband communication; Rician fading; UWB signal; broadband forest propagation; forest environment; impulse ultra wideband propagation; low antenna ultra wideband propagation measurement; path loss measurement; precision position location; receiver; small-scale fading analysis; transmitter; ultra wideband communication; wireless sensor network; Antenna measurements; Antennas and propagation; Broadband antennas; Loss measurement; Optical propagation; Pulse measurements; Research and development; Ultra wideband antennas; Ultra wideband technology; Wireless sensor networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
ISSN :
1525-3511
Print_ISBN :
978-1-4244-1997-5
Type :
conf
DOI :
10.1109/WCNC.2008.221
Filename :
4489252
Link To Document :
بازگشت