Patent ID: 8265124
Filing Date: 2012-09-11
Classification: G01S,H04B

Abstract:
1. A method for a positioning device, comprising: receiving a positioning signal; performing correlation calculations on the received positioning signal using a code replica of one spreading code among a plurality of spreading codes; selecting a total peak value and a remote peak value, the total peak value being a first maximum correlation value among correlation values obtained by the correlation calculations, and the remote peak value being a second maximum correlation value among correlation values apart from a phase of the total peak value by a phase equal to or greater than a given phase; changing a threshold value condition for the total peak value based on the remote peak value; and determining whether or not the received positioning signal is spread-modulated with the one spreading code by determining whether or not the total peak value satisfies the threshold value condition, the spreading code including a predefined number N of chips, N being an integer; the performing of the correlation calculations including dividing the spreading code into M cells, M being an integer greater than or equal to N, and performing the correlation calculations while shifting a phase in cell units; and a third maximum correlation value among correlation values corresponding to cells that are included in the M cells and apart from the phase of the total peak value by M/N or more cells being selected as the remote peak value.