Abstract: The present invention relates to receiver systems for receiving trains of pulses transmitted by satellites. The receiver system is characterized by the fact that it includes receiver means (100) for receiving pulses trains transmitted by the satellites and suitable for delivering signal trains representative of pulse trains, first compression means (102) for compressing signal trains by a factor n having an input (103) connected to the output (101) of the receiver means (100), demodulator means (104) having three inputs (105, 106, 107), the output (122) of the compression means (102) being connected to the input (105), a satellite code signal generator (108) connected to the demodulator means (104), a Doppler shift carrier signal train generator (109), and second compression means (102) connected between the generator (109) and the demodulator means (104).