6/21/2023 0 Comments Rssi signalWe are success to reduce the average error level up to 8.32%. Grab the free version of Netspot or inSSIDer (or wifiman on android) and run it during that time and see if you can find. Then, we compared the estimated distance with actual distance to find the error level in percentage. First, we take around 300 sample data (RSSI values) and find the standard deviation to calculate how much the RSSI values are spread out and use curve fitting technique to find suitable equation for estimate distance. EC/IO - indicates the downlink carrier-to-interference ratio (signal quality).EC/IO is a negative dBm value. Well, the RSSI is calculated based on some signal-model based estimator, whereas the dBm value on your spectrum analyzer is calculated with another metric namely, the power measured going through a filter with the filter bandwidth you configured at your spectrum analyzer. RSSI is a negative value, and the closer to 0, the stronger the signal. In this work we use RSSI technique to determine the distance. For 3G service mode, there are three relevant measurements: RSSI - Received Signal Strength Indicator. Time of Arrival (TOA), Time Difference of Arrival (TDOA) or Received Signal Strength (RSS) algorithms etc). There are lots of technique to find out the distance between two nodes (e.g. The lower the power level that the receiver can successfully process, the better the receive sensitivity. To locate a device distance measurement one of most important issue. RSSI (Received Signal Strength Indicator) Receive sensitivity refers to the power level of an RF signal required to be successfully received by the receiver radio. We used one node as a AP and another as a STA. NodeMCU which acts itself as a sensor node can be used as Access Point (AP) or as a STAtion (STA). In this work we used two NodeMCU (ESP8266 WiFi module) which is a easily programmable. WiFi is also applicable in future tech of IoT (Internet of Things). Airports, railways, bus-stand, home, markets everywhere now people uses WiFi because its reliability and low-cost. The use of WiFi is now a part of each human life.
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