Vol.5 No.2 (April 2015)
Geometrical Location Algorithm Based on Position Correction
RSSI-based location method is increasingly used in indoor wireless positioning for its low power consumption, low cost and low hardware complexity. However, RSSI-based location also has many flaws, such as poor network stability, large environmental interference, leading to a large position error. For these, the paper puts forward an improved algorithm. First, we collect RSSI value 20 times using a Gaussian filter to filter out error sample and then get node coordinates by geometric algorithm. Finally, a new correction algorithm is proposed to correct coordinates. Test results show that this method can reduce the average error from 2.6 m to about 1.4 m; correction effect is obvious.
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