New RSSI-based tracking for following mobile targets using the law of Cosines

Lately, there has been increasing interest for collecting and analyzing large amounts of data, produced by humans or mobile devices, to generate valuable knowledge. There is a common case where proximity is required between a monitoring device and a mobile target of interest, thus, a Hunter-Prey scenario needs to be implemented. The aim of this letter is to propose a new received signal strength indicator-based tracking technique, based on the Law of Cosines, which can be applied efficiently to the scenario described above. The new algorithm is evaluated through a series of simulation tests and results indicate that it outperforms common techniques such as linear least squares estimators.