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I am currently reading a paper called "Indoor Localization for Bluetooth Low Energy Devices Using Weighted Off-set Triangulation Algorithm".

Now they use 3 reference points (APs) to triangulate the position of a person. If they find more than 3 reference points, they select the three best reference points.

To select the three best reference points they first look at the RSSI (received signal strength). Secondly they somehow calculate $W_r$ which indicates the quality of the triangle the three reference points defines.

$W_r$ is controlled by: - the shape of the triangle - the value of the distance ratio (which I think is the length of each side to each other, like L1/L2, L2/L3, L3/L1)

Now I find now way to calculate $W_r$ and wanted to ask if there is like a equation do this?

Pascal
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  • min length / max length – R. Emery Nov 30 '17 at 08:10
  • @R.Emery this would not definitely describe the shape of the triangle – Pascal Nov 30 '17 at 08:12
  • I thought you wanted the quality of the triangle – R. Emery Nov 30 '17 at 08:13
  • @R.Emery yes, but it should be defined by - the shape of the triangle - the value of the distance ratio, and the shape would at least require one angle? – Pascal Nov 30 '17 at 08:14
  • you need a metric. what defines how "good" or "bad" the triangle is? – R. Emery Nov 30 '17 at 08:17
  • yes, because how I understood the paper, the median euclidean error can be no larger than half the length of the side of the triangle, so a shorter triangle side and a equal side length of all three sides would be optimal. – Pascal Nov 30 '17 at 08:21

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