METHOD FOR TRACKING OF DELAY OF RANGE FINDER CODE FRONTS OF NAVIGATIONAL SATELLITE SIGNALS Russian patent published in 2008 - IPC G01S5/14 H04B1/06 

FIELD: devices used in satellite radio navigation.

SUBSTANCE: the claimed method uses the operation of linear interpolation of two adjacent numbered readouts of the input signal embracing the forecast moment of the next change of the code symbol, the obtained value of the interpolated ordinate is normalized to the estimate of the useful signal amplitude, multiplied by the Gaussian prior probability, and an error signal is obtained according to the criterion of the maximum of the posterior probability density.

EFFECT: enhanced accuracy of tracking of delay of range finder code fronts of navigational satellite signals with the aid of a theoretically optimal delay discriminator insensitive to the multipath propagation in a digital receiver, multiprogram one inclusive, as well as eliminated uncertainty in the method of interpolation of numbered ordinates of the mixture of the signal with noise by the moment of the forecast delay, eliminated uncertainty in the method of formation of the delay from the prehistory to the current moment of estimation.

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