DUAL-FREQUENCY RECEIVER FOR SATELLITE-BASED POSITIONING AND ASSOCIATED METHOD OF RECEPTION

摘要

Dual-frequency (L1, L2) receiver for satellite-based positioning, comprising a main measurement channel (L1) and a secondary channel (L2) for a calculation for correction of ionospheric propagation robust to differential errors linked to the local reception environment of the signals, each channel comprising a code generator, a carrier phase generator, integrators, phase and code discriminators, a code phase numerically- controlled oscillator (NCOC), a carrier phase numerically-controlled oscillator (NCOP), carrier phase loop matched filtering means, and code phase loop matched filtering means, comprising, furthermore: - means for determining the respective phase errors in the said main and secondary channels comprising means of interspectral correlation (INT3, M3) of the signals of the main and secondary channels (L1, L2) already correlated by the local code, after frequency compensation of the relative Doppler shifts of the said signals; and - respective feedback loops (B1, B2) for the said code and carrier phase errors in the said main and secondary channels.