Abstract: Briefly, in accordance with one embodiment of the invention, a method ascertaining location of a mobile communication unit with respect to at least one fixed access point, each respective location of each respective access point of the at least one fixed access point being known, may include: (a) transmitting a first message from the mobile communication unit; (b) transmitting a second message from at least one responsive fixed access point, the second message being responsive to the first message; (c) measuring at selected stations among the mobile communication unit and the at least one fixed access point time intervals between noting the first message and noting the second message; and (d) employing the measured time intervals at the selected stations for calculating at least one line of position locating the mobile communication unit.

Abstract: According to one embodiment, a method is disclosed. The method includes receiving data at a first wireless radio device that has been transmitted from the first wireless radio device, receiving time stamp information from a second first wireless radio device and estimating time of arrival (TOA) information based upon the data and the time stamp information.

Abstract: An algorithm identifies a line-of-sight (LOS) signal that may be used to provide an effective time-of-arrival (TOA) estimation.

Abstract: An algorithm identifies a line-of-sight (LOS) signal that may be used to provide an effective time-of-arrival (TOA) estimation.

Abstract: Correcting a signal offset may include observing a finite duration signal yn that comprises a representation of a mixture of a desired signal and an undesired signal. The undesired signal may include an offset component which may be modeled as comprising a step function u defined by unknown step function parameters. The unknown step function parameters may be estimated using, for example, a maximum likelihood method. Thereafter, yn may be corrected based on the estimated step function parameters.