Patent ID: 8406789

Claim:
An apparatus comprising at least one processor configured to cause the apparatus to: control a satellite positioning system receiver to obtain position and timing information from a satellite positioning system; control a receiver to tune to a frequency channel with Global System for Mobile communication (GSM) transmission; control a receiver to collect a group of in phase and quadrature (I/Q) samples for the length of 12 GSM frames; perform correlation on the group of I and Q samples; perform peak detection using at least two peak detectors over the group of samples wherein the found peak values are the locations of synchronization bursts (SCH); for the found peaks, determine the timing information, carrier-to-noise ratio, in phase and quadrature values; control a receiver to collect a group of in phase and quadrature (I/Q) samples for the length of 12 or 51 GSM frames; from the found SCH, determine base station identification code BSIC, frame number and Broadcast Control Channel (BCCH) training sequence for all SCH; decode BCCHs corresponding to all SCH; and determine time-difference-of-arrival (TDOA) between the found peak values using the determined timing information.