In order to improve the location accuracy in thecomplicated greenhouse environment, a positioning system isdesigned in this paper. According to RSSI data in the greenhouse,the parameters of the path-loss model are modified. Besides, leastsquare estimation is used to filter RSSI data to eliminate randomdisturbance. Based on RSSI, the blind node is positioned bytriangle centroid location method. Finally, to lessen the negativeinfluence of steel pillars in the greenhouse, a region segmentationmechanism is introduced to the system. Experiments prove thatour positioning system has higher accuracy in the greenhouse.
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