| EPSRC Reference: |
GR/J45329/01 |
| Title: |
THE INFLUENCE OF BUILDING CHARACTERISTICS ON THE INDOOR RADIO CHANNEL |
| Principal Investigator: |
Riley, Mr N |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Electronic Engineering |
| Organisation: |
University of Hull |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1993 |
Ends: |
30 September 1996 |
Value (£): |
97,136
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| EPSRC Research Topic Classifications: |
| RF & Microwave Technology |
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Summary on Grant Application Form |
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The main objective of this study is to improve the accuracy of models of indoor radio propagation, in particular taking account of realistic in-building environments. The four planned stages to achieve this objective are: development of a comprehensive model of indoor propagation, taking account of realistic reflection coefficients and diffraction; measurements to be carried out at 900MHz and 2.4GHz to determine electrical properties of materials; incorporation of these data into the model; and measurement of channel impulse response in a variety of indoor environments enabling calibration of the overall model.Progress:The model development stage of the study, mentioned above, is now substantially complete. The model, which traces rays within a room, accounts for reflections from plane walls having reflection coefficients which may be specified individually. The room is modelled using Cartesian planes with the direction of the perpendicular drop from the origin of the transmitter antenna to the wall representing its normal. The diverging wavefronts from the antenna are represented using directive waves at regular intervals between the outer limits of the antenna beam . These directive waves are then manipulated using travelling vectors. The model progressively finds intersections between waves and planes, with no limit on the number of waves involved, and accounts for intersections with up to three planes, i.e. it can account correctly for the interaction of a wave with the corner of a room. The resultants are then added to the already existing waves and if necessary the intersecting waves are eliminated. The vector representation of surfaces has allowed plane surfaces to be placed arbitrarily within the room, building, for instance, a model of a furnished room. The final stage of the modelling is to include the effects of diffraction around, and transmission through, obstacles. Currently the three-dimensional diffraction case can be implemented for perfectly-conducting obstacles and the dielectric case is under consideration. Work has also progressed on the planning of the initial stage of the measurement programme. In the first instance measurements will be carried out in a screened non-anechoic room (close to perfectly conducting). It is anticipated that the model will be accurate for this simple case.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.hull.ac.uk |