Patent ID: 8018988

Claim:
A method comprising: validating the detection of a correlation peak between: a signal transmitted by a plurality of navigation satellites and received by a radio navigation satellite system (RNSS) satellite radio navigation receiver, said signal corresponding to a sum of signals each sent by a satellite and each modulated by a spread spectrum signal characteristic of said satellite, a local replica generated by said RNSS satellite radio navigation receiver, said replica being the replica of a spread spectrum signal characteristic of a satellite that is being looked for, said method including a step of determining a correlation function ( 3 ) as a function of time between said received signal and said local replica, said method being characterized in that it further includes a step of comparing said correlation function ( 3 ) with a theoretical autocorrelation function ( 2 ) as a function of time of said spread spectrum signal characteristic of said satellite that is being looked for over the whole of a vector of the correlation function wherein comparing said correlation function ( 3 ) with the theoretical autocorrelation function ( 2 ) includes a step of comparing secondary peaks ( 5 , 7 ) of each of said correlation and theoretical autocorrelation functions.