DEVICE FOR RECEIVING SIGNALS FROM SATELLITE RADIO NAVIGATION SYSTEMS Russian patent published in 2006 - IPC G01S1/02 H04B1/06 

FIELD: engineering of radio navigation means, possible use for engineering devices for receiving signals from satellite radio navigation systems GLONASS and GPS of frequency range L1.

SUBSTANCE: device for receiving signals from satellite radio navigation systems contains serially connected input block of filtration and amplification, pass band of which envelopes frequency band, occupied by input signals of GLONASS and GPS of frequency range L1, and quadrature mixer, to support input of which output of heterodyne frequency signal generator is connected, to cophased output first low frequency filter serially connected to first rejecting filter and to first analog-digital converter is connected, and to quadrature output - second low frequency filter serially connected to second rejecting filter and to second analog-digital converter is connected, while support inputs of both analog-digital converters are connected to output of clock frequency signal generator. Heterodyne frequency signal generator is made in form of frequency synthesizer, generating at its output the signal with frequency, appropriate for center of frequency band of input GPS signal. Each one of low frequency filters has pass band, enveloping frequency bands of GLONASS and GPS signals, transformed in quadrature mixer. each one of rejecting filters has rejecting band, positioned between frequency bands of GLONASS and GPS signals, transformed in quadrature mixer. Clock frequency signal generator is made in form of frequency synthesizer, forming at its output the signal with frequency, satisfying conditions: where f_T - clock frequency, W_GPS - frequency band width of GPS signals transformed in quadrature mixer; W_GLONASS - frequency band width of GLONASS signals transformed in quadrature mixer; Δf - difference of frequencies between centers of frequency bands of GLONASS and GPS signals transformed in quadrature mixer.

EFFECT: increased serviceability under condition of presence of internal system interference, positioned in frequency range of signals of one of GLONASS or GPS systems, simplification of equipment and decreased clock frequency of analog-digital conversion.

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