An Alternative Indoor Localization Technique Based on Fingerprint in Wireless Sensor Networks
Although several methods based on the RSSI measurement exist for localizing a mobile node in the WSN, a method which can produce precise results is still unavailable. In this paper, the authors present an alternative technique based on fingerprint which uses a minimum number of anchor nodes for the detection of the location of a mobile node. In this technique an indoor area is thought as a matrix consisting of rows and columns, and the location of the mobile node is expressed as a cell in this matrix. In the first phase the expanded RSSI map of the indoor area is constructed off-line. In the preceding phase on-line RSSI values and the expanded RSSI map are intersected to find possible cells.