DocumentCode :
1542575
Title :
A wide-band propagation model based on UTD for cellular mobile radio communications
Author :
Zhang, Wei
Author_Institution :
Radio Lab., Helsinki Univ. of Technol., Espoo, Finland
Volume :
45
Issue :
11
fYear :
1997
fDate :
11/1/1997 12:00:00 AM
Firstpage :
1669
Lastpage :
1678
Abstract :
The present wide-band propagation model based on uniform geometrical theory of diffraction (UTD) for cellular mobile radio communications includes two major contributions. First, a UTD-based narrow-band channel transfer function containing both the diffracted electric field and the reflection of diffracted electric fields is derived. Not only is it an important element of the wide-band modeling method, but it also leads to a total path-loss prediction model verified by comparisons with previously published theoretical and experimental results. In particular, the distance for horizontal placement on the street allows one to calculate the ray-path length difference (used in wide-band modeling) for the diffracted field and the reflection. Second, new refinements (including a number of explicit-form expressions to an existing method experimentally confirmed, simulating wide-band radiowave propagation for rural environments including terrain profiles) are added, making it applicable here. The method generates the time-domain path loss, wide-band path loss, and the relative power in the frequency domain. The time-domain path loss physically interprets and reasonably predicts the power delay profiles. The presence of this and similar power delay profiles, as well as the behavior of the relative power in the frequency domain, has been confirmed by existing wide-band propagation measurements. The value of the wide-band path loss is of the order of the total path loss at the carrier frequency
Keywords :
cellular radio; delays; electric fields; electromagnetic wave absorption; electromagnetic wave reflection; geometrical theory of diffraction; land mobile radio; losses; radiowave propagation; telecommunication channels; time-domain analysis; transfer functions; UTD; cellular mobile radio communications; diffracted electric field; electric fields reflection; experimental results; frequency domain; horizontal placement distance; narrowband channel transfer function; path-loss prediction model; power delay profiles; ray-path length difference; relative power; rural environments; terrain profiles; time-domain path loss; total wideband path loss; uniform geometrical theory of diffraction; wideband propagation measurements; wideband propagation model; wideband radiowave propagation; Frequency domain analysis; Land mobile radio; Mobile communication; Narrowband; Physical theory of diffraction; Predictive models; Reflection; Solid modeling; Time domain analysis; Wideband;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/8.650079
Filename :
650079
Link To Document :
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