Mitigation of Multipath Fading Effects to Improve Indoor RSSI Performance

Received signal strength indicator (RSSI) is not suitable for fine-grained indoor applications because of imprecise and unreliable readings caused by multipath fading. This paper presents a simple and robust mechanism to improve RSSI by mitigating multipath fading effects in an indoor environment. Signal analysis is provided to explain the rationale of this method. The proposed method provides instantaneous solution, thus it is compatible with time-series filters and can be cascaded as additional improvement. The contributions of this proposal are the ease of implementation and its excellent output performance. The results show that it is able to eliminate unwanted noisy components caused by multipath fading, and thus obtain more reliable and stable RSSI readings.