Patent ID: 9203465
Filing Date: 2015-12-01
Classification: G01S,H04B

Abstract:
1. A method of acquiring a satellite signal by a receiver, said satellite signal being spread by a Gold sequence (c i ) at a chip frequency, said Gold sequence being obtained as the sum of a first M-sequence (x) generated using a first shift register and a second M-sequence (y i ) generated using a second shift register, said second M-sequence identifying one satellite among a plurality of satellites, the method comprising: (a) sampling the satellite signal received in base band at the chip frequency starting from a determined time (q) to provide a sequence of first samples (r (b) multiplying the sequence of said first samples (r (c) decoding the sequence of second samples ({tilde over (r)} (d) comparing the estimated content of the second shift register with a plurality of possible contents of the second shift register for the different satellites of said plurality, and if the comparison is successful for an identified satellite (i