US 12,216,213 B2
System and receiver for GNSS signals
Gaetano Rivela, Catania (IT)
Assigned to STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed by STMicroelectronics S.r.l., Agrate Brianza (IT)
Filed on May 4, 2023, as Appl. No. 18/312,157.
Claims priority of application No. 102022000011330 (IT), filed on May 30, 2022.
Prior Publication US 2023/0384459 A1, Nov. 30, 2023
Int. Cl. G01S 19/24 (2010.01); G01S 19/04 (2010.01)
CPC G01S 19/243 (2013.01) [G01S 19/04 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A system, comprising:
a phase-locked loop (PLL) configured to provide a first local oscillator (LO) signal and a voltage-controlled oscillator (VCO) signal having a signal frequency higher than the first local oscillator signal;
a first quadrature demodulator configured to downconvert global navigation satellite system (GNSS) signals received from a plurality of GNSS satellites over a set of carrier frequencies to produce a first intermediate frequency (IF) signal;
a first signal processing chain configured to pass the first IF signal;
a second signal processing chain comprising a first frequency divider configured to produce a second LO signal based on the first LO signal, and a second quadrature demodulator configured to convert the first IF signal to a second IF signal based on the second LO signal; and
a third signal processing chain comprising a second frequency divider configured to produce a third LO signal based on the VCO signal, and a third quadrature demodulator configured to convert the first IF signal to a third IF signal based on the third LO signal.