METHOD OF DETECTING, ESTIMATING PARAMETERS AND SUPPRESSING IMITATION INTERFERENCE AND NAVIGATION RECEIVER WITH DEVICE FOR DETECTING, ESTIMATING PARAMETERS AND SUPPRESSING INTERFERENCE Russian patent published in 2020 - IPC G01S19/21 H04B7/185 H04K3/00 

FIELD: physics.

SUBSTANCE: invention relates to radio navigation, specifically to receivers of satellite radio navigation systems signals, intended for use in positioning systems under conditions of imitation interference. Disclosed method is based on maximum likelihood method. Complex amplitudes w_m of true, imitation and reflected signals are generated as weighted with weights q_mk of the sum of correlations ρk complex input signal with a plurality of copies of the ranging code r(t-τk), k = 1, …, M, overlapping area of possible shifts of simulation signals relative to true navigation signal. Complex amplitudes w_m and their shifts τm on delay axis is used to check for compliance of a priori information: non-corresponding amplitudes w m are considered as imitation or reflected signals and discarded, and only undistorted navigation signal corresponding to a priori information is stored. Receiver comprises master oscillator, RF transducer, multichannel digital correlator, multichannel device for digital processing of correlation readings, generator of time scale of receiver and navigation processor. Each channel of digital correlator comprises device for estimating parameters of true and several interfering signals, and each channel for digital processing of correlation counts comprises several tracking subchannels based on the number of detected signals at the output of the correlation channel of the selected satellite.

EFFECT: technical result is elimination of errors of estimates of delay and phase of true navigation signal caused by imitation and other interfering signals.

3 cl, 8 dwg