Patent ID: 6081691
Filing Date: 2000-06-27
Classification: G01S

Abstract:
Receiver of satellite signals, able to receive and process signals transmitted by satellites belonging to a network with a single carrier frequency and signals transmitted by satellites belonging to a network with several carrier frequencies, this receiver comprising:a radio signals reception chain comprising circuits for transposing the carrier frequencies received to several transposed frequencies differing according to the carrier frequency received, and at least one analogue/digital converter for converting the signals thus transposed into a digital signal with several transposed carrier frequencies corresponding to several satellites received simultaneously and transmitting on different carriers,at least one digital signal processing channel which receives the digital signal with several transposed carrier frequencies, each channel comprising a random code phase- and transposed carrier phase- servocontrol loop, the servocontrol loop comprising on the one hand at least one digital phase control oscillator controlled by a frequency set-point signal and a phase error signal and on the other hand a programmable local pseudo-random code generator,code selection means enabling a user to apply to the code generator a signal for selecting one code from several possible codes, the various codes corresponding to the various satellites of the two networks,frequency selection means, enabling the user to apply to the oscillator one from several possible frequency set-point signals, the various set-point signals corresponding to the various satellites of the second network as well as to all of the satellites of the first network;the receiver finally comprising means for computing position from digital values provided in the servocontrol loop.