| Article |
| Type of Publication |
| Unequal Weighting for Improved Positioning in GPS-less
Sensor Networks |
| Title |
|
Thomas King
|
| Authors |
| Journal on Advances in Signal Processing, Special
Issue on: Cooperative Localization in Wireless Ad Hoc and
Sensor Networks 2008 (281635 (doi:10.1155/2008/281635)), 2008 |
| Published in |
| Positioning can be done by means of
triangulation in which triples of position-aware nodes estimate a
neighbor's position with the help of distances. If a larger
number of nodes exist, multiple position estimates can be
averaged to yield a more precise mean position. Rather than
applying equal weights to each position estimate, we propose an
unequal weighting scheme which emphasizes those summands in the
averaging process that are more reliable than others. We will
show that significant improvements of the overall estimate can be
achieved, given that additional information about the error
variance of a contributing estimate is known. A major advantage
of the approach is that the precision of existing positioning
systems can be improved without technical
modifications. |
| Abstract |
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