Patent ID: 8483703

Claim:
A radio system comprising: a plurality of base stations and a radio narrowband transceiver, operating in any VHF, UHF and 700/800 MHz frequency bands; the radio narrowband transceiver exchanging voice or data on a conventional narrowband channel of a plurality of conventional narrowband channels with a base station of the plurality of base stations, the radio narrowband transceiver having a voltage controlled oscillator generating a non-linear wideband chirp signal that non-linearly sweeps across the plurality of conventional narrowband channels, and transmitting the generated non-linear wideband chirp signal to all of the plurality of base stations; and the plurality of base stations, each having a matched filter, receiving the non-linear wideband chirp signal from the radio narrowband transceiver, determining an identity of the radio narrowband transceiver based on a phase variation of the non-linear wideband chirp signal and triangulating a location of the identified radio narrowband transceiver using the received non-linear wideband chirp signal.