![]() The proposed filter shows an available feature, where small test RSSI samples gain a low deviation of less than 1 dBm from a large RSSI sample collected about 10 min, and the sub-classification RSSIs conform to normal distribution when the minimum sample count is greater than 20. ![]() Therefore, this paper proposed a tri-partition RSSI classification and its tracing algorithm as an RSSI filter. However, it suffers from low stability because RSSI is easily blocked and easily interfered with by objects and environmental effects. Received signal strength indicator (RSSI)-based positioning is suitable for large-scale applications due to its advantages of low cost and high accuracy.
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