Patent ID: 8565787

Claim:
A method of estimation of a location of a terminal within an area of coverage of a wireless network comprising at least one fixed node, the method comprising: estimating the location of the terminal on the basis of at least a comparison between data representing a first metric of a complex frequency response of a radio channel between the terminal and one of said at least one fixed node and data representing a plurality of stored metrics, and each of said plurality of stored metrics being related to one of a plurality of different locations within the network and each stored metric being of a complex frequency response measured between the said one of said fixed nodes and the location within the network to which the metric relates, wherein the data representing the first metric of the complex frequency response of the radio channel between the terminal and said one of said fixed nodes is determined by: receiving pilot tone values of an Orthogonal Frequency Division Multiplex symbol; estimating the complex frequency response of the radio channel on the basis of the received pilot tones; and evaluating the first metric on the basis of an autocorrelation function of the estimated complex frequency response.