Patent ID: 8639264

Claim:
An indoor localization system for locating an electronic mobile device within an indoor environment, the indoor localization system comprising: a plurality of transmitting nodes arranged in different positions within the indoor environment and configured to transmit RF signals; and the electronic mobile device configured to receive the RF signals from the transmitting nodes; the indoor localization system being configured to operate in: a training mode, in which the electronic mobile device is operable to compute reference quantities based on powers of the RF signals received from the transmitting nodes in different reference positions within the indoor environment; and a locating mode, in which the electronic mobile device is operable to compute current quantities based on the powers of the RF signals received from the transmitting nodes in its current location within the indoor environment, and in which the current location of the electronic mobile device is determined based on the current and the reference quantities; wherein the plurality of transmitting nodes are operable, in both the training and the locating modes, to transmit the RF signals over at least two different radio channels; wherein the electronic mobile device is operable in the training mode to compute, for each reference position and each of the at least two different radio channels, corresponding reference quantities based on the RF signals received by the electronic mobile device in said reference position from the transmitting nodes over said radio channel; and wherein the electronic mobile device is operable in the locating mode to compute, for each of the at least two different radio channels, corresponding current quantities based on the RF signals received by the electronic mobile device in its current location from the transmitting nodes over said radio channel.