METHOD AND SYSTEM FOR MULTIFREQUENCY POSITIONING IN SHIELDED SPACE Russian patent published in 2015 - IPC G01S19/22 

FIELD: radio engineering, communication.

SUBSTANCE: method comprises simultaneously receiving positioning signals for bandwidths of satellite navigation systems: L1 GPS, L1 GLONASS, L2 GPS, L2 GLONASS, L3 GLONASS, L5 GPS. Each used signal is re-emitted by a separate frequency-selective relay which selects, using a band-pass filter, only the bandwidth used by a receiving and a radiating antenna. The method includes simultaneously obtaining digital information from all received positioning signals; simultaneously calculating coordinates and current time for each of the received bandwidths of the satellite navigation systems; the obtained different coordinates correspond to coordinates of receiving antennae, and the time obtained when calculating each coordinate is equal to the sum of the delay time in the relay and the propagation time of the signal from the emitter to the receiver; comparing the obtained coordinates for each bandwidth of the corresponding satellite navigation system; the divergence of coordinates indicates that a multifrequency receiver is located in shielded space; solving the task of determining the position of the antenna of the multifrequency receiver.

EFFECT: high accuracy of positioning in shielded space.

7 cl, 1 dwg