High resolution wireless indoor positioning system for legacy standards-based narrowband mobile radios

A system for calculating the time-of-arrival of a wireless signal through a wireless channel, comprising:

• a receiver device that
• receives two or more data packets transmitted through a wireless channel, wherein the two or more data packets are a result of two or more transmissions that are made sequentially in time at different center frequencies in order to span a desired bandwidth, wherein each data packet of the two or more data packets is transmitted at a single center frequency, and wherein the two or more received data packets represent narrowband signals that span the same desired bandwidth as a wideband signal,
• estimates time differences among the two or more transmissions and/or carrier phase differences among the two or more transmissions, and
• calculates a time-of-arrival of any one of the two or more data packets using each of the two or more received data packets and one or more of the estimated time differences, the different center frequencies, and the estimated carrier phase differences, wherein using each of the data packets of the two or more received data packets in the calculation allows the time of arrival to be calculated with the same accuracy as a wideband signal that spans the same bandwidth as the two or more received data packets.