APPARATUS FOR MEASURING THE DISTANCE BETWEEN A MOBILE STATION AND A BASE STATION IN A MOBILE RADIOCOMMUNICATIONS SYSTEM

摘要

Apparatus or measuring the distance between a mobile station and a base station in a mobile radiocommunications system, said apparatus including means for determining the reception instant at which the mobile station receives predetermined data transmitted by the base station, which means themselves include correlation means (4) for correlating an in-phase component and a quadrature component of a modulated signal received by the mobile station respectively with an in-phase component and a quadrature component of a reference signal generated in the mobile station and corresponding to said predetermined data, said correlation means delivering real components and imaginary components of correlation coefficients, and said apparatus being essentially characterized in that it further includes means (7) for using the real components and the imaginary components of the correlation coefficients to determine a complex magnitude whose phase varies continuously as a function of said reception instant.