Patent ID: 8130141

Claim:
A positioning system comprising: a terrestrial transmitter network comprising a plurality of transmitters that broadcast positioning signals comprising at least ranging signals and positioning system information, wherein a ranging signal comprises information used to measure a distance to a transmitter broadcasting the ranging signal; a remote receiver that acquires at least one of the positioning signals and satellite signals, wherein the satellite signals are signals of a satellite-based positioning system, wherein a first operating mode of the remote receiver comprises terminal-based positioning in which the remote receiver computes a position of the remote receiver from at least one of the positioning signals and the satellite signals; and a server coupled to the remote receiver, wherein a second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from information derived from at least one of the positioning signals and the satellite signals, wherein the remote receiver receives and transfers to the server information derived from at least one of the positioning signals and the satellite signals, wherein the remote receiver identifies multipath components of the positioning signals by generating a cross-correlation function by cross-correlating received samples with a reference sequence, and extracting from the cross-correlation function a vector that is derived from a first number of samples left of a peak of the cross-correlation function and a second number of samples right of the peak.