DocumentCode :
1378370
Title :
Path Loss Prediction for Mobile Digital TV Propagation Under Viaduct
Author :
Wang, Zhongyuan ; Jin, Ronghong ; Jin, Yao
Author_Institution :
Shanghai Media Group, Shanghai, China
Volume :
57
Issue :
1
fYear :
2011
fDate :
3/1/2011 12:00:00 AM
Firstpage :
37
Lastpage :
45
Abstract :
By the end of 2009, the service for in-vehicle mobile digital TV has been successively carried out in many cities around the world. Viaducts over roads are common in urban areas. In this paper, a 3-dimension six-ray tracing model reveals the fading law of UHF wave for in-vehicle digital TV system under the impact from viaducts, subject to transmitting antenna being higher than viaduct deck. The model takes into account the six rays that undergo line-of-sight (or viaduct transmission) propagation, ground reflection, as well as edge diffraction. In order to obtain more accurate knowledge of path loss law in an actual moving TV system, the 90th percentile of path loss values within the space 10 m have been analyzed. It has been illustrated that factors that influence path loss law include wave polarization, height of two antennas and the horizontal distance between transmitting antenna and viaduct deck axis. The path loss law predicted by the six-ray model shows a reasonable match with measurement results which have a great disparity in those estimated by the popular used propagation models.
Keywords :
UHF radio propagation; bridges (structures); digital television; fading; mobile television; ray tracing; transmitting antennas; 3D six-ray tracing model; UHF wave; actual moving TV system; edge diffraction; fading law; ground reflection; horizontal distance; in-vehicle digital TV system; in-vehicle mobile digital TV; line-of-sight propagation; mobile digital TV propagation; path loss law; path loss prediction; propagation models; transmitting antenna; viaduct deck axis; viaduct transmission propagation; wave polarization; Digital TV; UHF radio propagation; land mobile radio; magnetic losses; prediction method; ray tracing;
fLanguage :
English
Journal_Title :
Broadcasting, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9316
Type :
jour
DOI :
10.1109/TBC.2010.2088330
Filename :
5635366
Link To Document :
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