A New Worldwide Tracebility Technology to Complement GPS
Rene Schmidt, Andre Gagnon · 2007
This paper presents for the first time a system (U.S. Pat. No 5,939,982 [JJ followed by patent pending publication No 20050285790 [2]) for providing an approximate trace of where an object has been by recording publicly available FM radio transmission signals and then using unique characteristics of the recordings to determine location. The system consists of a special low-power FM-receiver (tag) designed for recording both digital and analog information from any worldwide standard FM radio broadcasting signal instead of the sound signals and a set of software correlation algorithms using a combination of publicly available and privately generated FM broadcast signal- characteristic databases to identify the probable location of a recording.