Patent ID: 7570213

Claim:
Method for detecting and locating intrusion in a wireless network, comprising the steps of: receiving an intruding radio frequency signal by a plurality of receivers; measuring the received signal strength R i on each of said plurality of receivers; for each paired combination of said plurality of receivers, computing one relative distance measurement d to the location of said transmitting source, said one relative distance measurement d being a function of said received signal strength R i of each said receiver in each said paired combination; for each paired combination of said plurality of receivers, computing the possible locations of said transmitting source lying on the locus of points satisfying d=[R 1 /R 2 ] 1/2 ; further comprising; computing the displacement c of the center of said locus from the first receiver in each said paired combination; computing the radius r of said locus; and, computing the point about which said locus is centered; computing the intermediate points of intersection of all said loci corresponding to all said paired combinations; and computing the actual points of intersection from said intermediate points of intersection of all said loci of points so as to determine an unambiguous location of said transmitting source.