Patent ID: 7085309

Claim:
A receiver for radio-frequency signals modulated by specific codes of transmitting sources, in particular of the GPS type, said receiver including: receiving and shaping means with frequency conversion of the radio-frequency signals for generating intermediate signals, a correlation stage formed of several correlation channels for receiving the intermediate signals, each channel being provided with a correlator in which the intermediate signals are correlated, in at least one control loop of the correlator when the channel is being used, with at least two early and late replicas of the specific code of a visible transmitting source to be searched and tracked, the correlator including integration means for the correlated signals, to provide, at the end of each integration period, a first amplitude value of the auto-correlation function of the early signals and a second amplitude value of the auto-correlation function of the late signals, in a tracking mode of the transmitting source the first and second amplitude values being kept substantially equal, microprocessor means connected to the correlation stage for processing the data extracted, after correlation, from the radio-frequency signals, wherein at least a second unused channel is configured with parameters from at least a first operating channel via the microprocessor means to be placed in parallel to a said first operating channel for searching and/or tracking the same visible transmitting source, when the microprocessor means have detected the presence of multipath radio-frequency signals in the first operating channel, the microprocessor means enslaving the second channel for generating a specific code replica to be correlated with the intermediate signals so that the integration means of the second channel provide a maximum amplitude value for the auto-correlation function between the first and second amplitude values of the auto-correlation function of the first channel.