Patent ID: 6532255
Filing Date: 2003-03-11
Classification: G01S,H04B

Abstract:
A method of minimizing an autocorrelation error in a demodulation of a spread-spectrum signal which is received from a transmitter via a plurality of propagation paths, the method which comprises:providing a local spread sequence and correlating the local spread sequence with a received spread sequence in a first control loop on a first phase-angle pair having a first early-late spacing 2&Dgr;1; correlating the local spread sequence with the received spread sequence in a second control loop on a second phase-angle pair having a second early-late spacing 2&Dgr;2; whereby the first control loop and the second control loop emit a first point phase value T1 and a second point phase value T2 respectively, when in the steady state; and calculating a phase T0 with which the local spread sequence is supplied to a demodulation correlator, with respect to the received spread sequence, according to the formula T0=(&Dgr;2Â·T1âˆ’&Dgr;1Â·T2)/(&Dgr;2âˆ’&Dgr;1) where &Dgr;2 is chosen to be 1.