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A GIS approach for mobile telephone signal path-loss prediction


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Yang, Helen Yingchieh 1997 , 'A GIS approach for mobile telephone signal path-loss prediction', Research Master thesis, University of Tasmania.

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Signal propagation path-loss prediction is a fundamental problem for the planning and
design of a cellular mobile telephone system. Many models, empirical, experimental, or
analytical, have been designed and used. The analytical models apply the path-loss
prediction formulae to path profiles derived from a digital elevation model to obtain the
signal path-loss. The digital elevation model stores detailed terrain height data. The
heights can be sampled regularly, or selectively stored to capture important terrain
features. The regular sampled elevation database (grid model) has been used for most of
the existing analytical path loss prediction models. Carefully examination of the grid
model reveals that it is not the only terrain representation. TIN (Triangular Irregular
Network) terrain model can be used as an alternative elevation database. With the TIN
model, sudden changes and other surface features that are difficult to store in the grid
model can be included in the database. More accurate path profiles could be derived
and more accurate path loss prediction would be achieved.
Geographical Information Systems (GIS) are a new technology that are often used in
applications requiring analysis and manipulation of the spatial conditions and situations.
It provides spatial and non-spatial databases, as well as various analytical tools for
general application purposes. The characteristics of a GIS are such that it can be used
for radio signal path-loss prediction.
This thesis examines the existing analytical path-loss prediction methods. The
possibility and feasibility of using GIS analytical tools to predict signal propagation
path-loss is discussed. GIS functions, using TIN as a terrain representation are used to
carry out qualitative and quantitative analysis of signal propagation based on the
analytical prediction models are examined and prototyped. The method is implemented
using AML programs in ARC/INFO software, and C functions on a SUN Spare
The test is performed on the Hobart area in Tasmania, Australia. Program performance
speed and accuracy are analyzed and discussed against the method based on grid terrain

Item Type: Thesis - Research Master
Authors/Creators:Yang, Helen Yingchieh
Keywords: Cell telephone systems, Geographic information systems
Copyright Holders: The Author
Copyright Information:

Copyright 1997 the Author - The University is continuing to endeavour to trace the copyright owner(s) and in the meantime this item has been reproduced here in good faith. We would be pleased to hear from the copyright owner(s).

Additional Information:

Thesis (M.SIS)--University of Tasmania, 1998. Includes bibliographical references

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