GPS RECEIVER (VERSIONS) AND METHOD TO EXTRACT AMPLITUDE AND PSEUDO-DOPPLER SIGNAL PHASE Russian patent published in 2012 - IPC G01S19/38 

FIELD: radio engineering.

SUBSTANCE: invention relates to the field of radio engineering, namely, to general architecture of a global positioning system (GPS), to specific sections of digital signal processing, and may be used in receivers of satellite communication. GPS includes a combination of channels of digital processing of complex digital signals L1 and L2, besides, an "accurate" P-code is used to receive the estimate of the cophased and quadrature components of both signals; a programmable processor for calculations. Signals L1 and L2 are coded with an unknown W-code, and a complex signal L1 is multiplied by a generated copy of P-code and is integrated during the period of time, approximately equal to the time of transfer of W-code bit. The complex signal L2 is multiplied by a copy of P-code, integrated and fixed to account for a delay of the signal L2 relative to L1. Cophased components of integrated signals are weighted; the weighted sum is compared to zero; its absolute value is compared to a threshold value. The integrated complex signal L2 is added to the stored complex signal L2 or subtracted from it depending on the sign of the weighted sum, if the value of the weighted sum exceeds the threshold. The accumulated complex signal L2 includes estimates of almost maximum probability of the desirable amplitude L2 and the pseudo-Doppler phase.

EFFECT: invention provides for adaptability, reduced consumption of power and other resources, and also increased quality of the system at low hardware complexity.