Patent ID: 8907844

Claim:
Dual-frequency receiver for satellite-based positioning, the receiver comprising: a main channel and a secondary channel for a calculation of a correction of ionospheric propagation robust to differential phase errors linked to a local reception environment of signals, the main and secondary channels being configured to receive and conduct signals, each channel comprising a code phase generator, a carrier phase generator, integrators, phase and code discriminators, a code phase numerically-controlled oscillator, a carrier phase numerically-controlled oscillator, carrier phase loop matched filtering means, and code phase loop matched filtering means; means for determining code and carrier phase errors in the main and secondary channels comprising an interspectral correlation subassembly configured to convert the signals of the main and secondary channels, already correlated by a local code, to first and second frequency domain spectra, respectively, the interspectral correlation subassembly being further configured to perform a frequency shift compensation operation on at least one of the first and second frequency domain spectra, multiply the first spectrum with the second spectrum after the frequency shift compensation operation has been performed to obtain a result, and convert the result to a time domain signal; and respective feedback loops for the code and carrier phase errors in the main and secondary channels.