Patent ID: 6768451
Filing Date: 2004-07-27
Classification: G01S

Abstract:
A method for determining the correlation between on the one hand a signal transmitted by a beacon and received at a receiver tracking said beacon and on the other hand a reconstructed signal expected to be received at said receiver from said beacon, wherein said received signal and said reconstructed signal are shifted against each other, said method comprising:a) multiplying a respective overlapping part of said received signal and said reconstructed signal for each shifting position; b) dividing the overlapping part for each shifting position into sections and integrating the products resulting in the preceding step within each section; c) multiplying the result of the integration of a respective first section with a complex conjugated version of the result of the integration of a respective second section having a predetermined distance to the first section for a predetermined number of first sections; d) integrating the products resulting in step c); and e) determining at least the maximum value resulting in step d) for the different shifting positions, the shifting position with the maximum value being the most probable candidate of being the shifting position with the maximum correlation.