US 12,292,513 B2
Cross-frequency correction for precise positioning
Min Wang, Tustin, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Sep. 12, 2022, as Appl. No. 17/931,399.
Prior Publication US 2024/0094403 A1, Mar. 21, 2024
Int. Cl. G01S 19/07 (2010.01); G01S 19/33 (2010.01)
CPC G01S 19/07 (2013.01) [G01S 19/33 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A method performed at a mobile device for determining a position based on Global Navigational Satellite System (GNSS) signals, the method comprising:
receiving, using a communication interface, correction data associated with two or more pseudorange measurements, including (1) a first pseudorange measurement of a first GNSS signal sent from a satellite vehicle and received at a reference station on a first GNSS carrier frequency and (2) a second pseudorange measurement of a second GNSS signal sent from the satellite vehicle and received at the reference station on a second GNSS carrier frequency, the first GNSS carrier frequency being different from the second GNSS carrier frequency;
measuring a third GNSS signal sent from the satellite vehicle and received at the mobile device on a third GNSS carrier frequency different from the first GNSS carrier frequency and different from the second GNSS carrier frequency, to generate a third pseudorange measurement; and
determining the position of the mobile device using (a) the third pseudorange measurement of the third GNSS signal on the third GNSS carrier frequency and (b) the correction data associated with the two or more pseudorange measurements, including the first pseudorange measurement of the first GNSS signal on the first GNSS carrier frequency and the second pseudorange measurement of the second GNSS signal on the second GNSS carrier frequency,
wherein the correction data includes or is used to generate a virtual pseudorange measurement for the third GNSS carrier frequency, the virtual pseudorange measurement based on a linear combination of (1) the first pseudorange measurement of the first GNSS signal on the first GNSS carrier frequency and (2) the second pseudorange measurement of the second GNSS signal on the second GNSS carrier frequency, and
wherein the linear combination depends on one or more coefficients based on the first GNSS carrier frequency, the second GNSS carrier frequency, and the third GNSS carrier frequency.