Patent ID: 7760138

Claim:
A satellite positioning receiver comprising: at least one receive channel, each receive channel configured to perform a combined processing of a first S 1 and a second S 2 radiofrequency signal transmitted by one and the same satellite and separated in frequency, the signals being received by analogue paths of the receiver and then digitized to be processed in digital receive paths, wherein each receive channel includes: a first correlation circuit and a second correlation circuit, each correlation circuit respectively receiving the first and the second digitized received signals, each correlation circuit having: a carrier correlation path providing a correlation between the respective received signal and a respective complex local carrier; code correlation paths providing a correlation between the correlated received signal at outputs of the carrier correlation paths and respective local codes; and an integrator for each code correlation path; carrier and code phase discriminators, the discriminators being common to both correlation circuits and configured to supply, from signals output from the integrators of the two correlation circuits, a subcarrier and code velocity signal (Vc) after a code loop corrector, and a central carrier velocity signal after a carrier loop corrector; a complex local carrier generator for each carrier correlation path, each local carrier generator being driven by a carrier local phase signal output from at least one carrier numerically controlled oscillator NCOp controlled by a central carrier velocity signal, a local code generator configured to generate local codes for each code correlation path, each code generator configured to be driven by a local code phase signal output from at least one code numerically controlled oscillator NCOc controlled by the subcarrier velocity (or code velocity) signal, the local codes supplied by each code generator being offset by a positive differential delay correction +Δτ cal for one of the correlation circuits and a negative differential delay correction −Δτ cal for the other, these corrections tending to compensate the delay differential between the two signals received in the analogue paths of the receive channel.