# US 2025/0093526 A1 · Ultra wide-lane (uwl) ambiguity to identify precise positioning engine (ppe) correction exceptions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0093526 A1 - Document ID: US20250093526A1 - Status: Published application - Kind: A1 - Application number: 18/467,000 - Filed: 2023-09-14 - Published: 2025-03-20 - Earliest claimed: 2023-09-14 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Min WANG - Web page: https://patentgrep.com/patent/US20250093526A1 ## CPC - G01S 19/396: {Determining accuracy or reliability of position or pseudorange measurements} - G01S 19/41: Differential correction, e.g. DGPS [differential GPS] - G01S 19/40: Correcting position, velocity or attitude - G01S 19/43: using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry - G01S 19/44: Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract A global navigation satellite system (GNSS) device may receive GNSS correction data from a correction data source and obtain a first carrier-phase measurement of a first GNSS signal having a first carrier frequency, and a second carrier-phase measurement of a second GNSS signal having a second carrier frequency. The GNSS device may apply the GNSS correction data to the first carrier-phase measurement, the second carrier-phase measurement, or both. The GNSS device may, subsequent to applying the GNSS correction data, perform a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement and determine whether the GNSS correction data includes an error based at least in part on whether a difference between a float ambiguity value for the WL combination and a closest integer exceeds a threshold value. ## Claims ### Claim 1 A method of identifying an error in global navigation satellite system (GNSS) correction data for precise positioning of a GNSS device, the method comprising: receiving, at the GNSS device, the GNSS correction data from a correction data source; obtaining, using a multi-band GNSS receiver of the GNSS device: a first carrier-phase measurement of a first GNSS signal having a first carrier frequency, and a second carrier-phase measurement of a second GNSS signal having a second carrier frequency; applying the GNSS correction data to the first carrier-phase measurement, the second carrier-phase measurement, or both; subsequent to applying the GNSS correction data, performing a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement; and determining whether the GNSS correction data includes an error based at least in part on whether a difference between a float ambiguity value for the WL combination and a closest integer exceeds a threshold value. ### Claim 2 (depends on 1) The method of claim 1, further comprising, responsive to determining that the GNSS correction data includes the error, determining a precise GNSS position estimate of the GNSS device without using the GNSS correction data to for ambiguity resolution. ### Claim 3 (depends on 2) The method of claim 2, further comprising outputting the precise GNSS position estimate of the GNSS device to an application, an operation system, a component of the GNSS device, a second device, or any combination thereof. ### Claim 4 (depends on 1) The method of claim 1, further comprising determining the float ambiguity value for the WL combination, wherein determining the float ambiguity value for the WL combination comprises solving a geometry component of the WL combination. ### Claim 5 (depends on 1) The method of claim 1, further comprising determining the float ambiguity value for the WL combination, wherein determining the float ambiguity value for the WL combination comprises taking a difference between a carrier phase value of the WL combination and a narrow-lane (NL) pseudorange value. ### Claim 6 (depends on 1) The method of claim 1, wherein the WL combination comprises an ultra-wide lane (UWL) combination in which an effective wavelength of the UWL combination is greater than 3 m. ### Claim 7 (depends on 1) The method of claim 1, wherein the GNSS correction data comprises real-time kinematic (RTK) or precise point positioning (PPP) correction data. ### Claim 8 (depends on 1) The method of claim 1, wherein threshold value is 0.25 or less. ### Claim 9 A global navigation satellite system (GNSS) device comprising: a multi-band GNSS receiver; one or more memories; and one or more processors communicatively coupled with the multi-band GNSS receiver and the one or more memories, wherein the one or more processors are configured to: receive GNSS correction data from a correction data source; obtain, using the multi-band GNSS receiver: a first carrier-phase measurement of a first GNSS signal having a first carrier frequency, and a second carrier-phase measurement of a second GNSS signal having a second carrier frequency; apply the GNSS correction data to the first carrier-phase measurement, the second carrier-phase measurement, or both; subsequent to applying the GNSS correction data, perform a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement; and determine whether the GNSS correction data includes an error based at least in part on whether a difference between a float ambiguity value for the WL combination and a closest integer exceeds a threshold value. ### Claim 10 (depends on 9) The GNSS device of claim 9, wherein the one or more processors are further configured to, responsive to determining that the GNSS correction data includes the error, determine a precise GNSS position estimate of the GNSS device without using the GNSS correction data to for ambiguity resolution. ### Claim 11 (depends on 10) The GNSS device of claim 10, wherein the one or more processors are further configured to output the precise GNSS position estimate of the GNSS device to an application, an operation system, a component of the GNSS device, a second device, or any combination thereof. ### Claim 12 (depends on 9) The GNSS device of claim 9, wherein the one or more processors are further configured to determine the float ambiguity value for the WL combination, wherein determining the float ambiguity value for the WL combination comprises solving a geometry component of the WL combination. ### Claim 13 (depends on 9) The GNSS device of claim 9, wherein the one or more processors are further configured to determine the float ambiguity value for the WL combination, wherein determining the float ambiguity value for the WL combination comprises taking a difference between a carrier phase value of the WL combination and a narrow-lane (NL) pseudorange value. ### Claim 14 (depends on 9) The GNSS device of claim 9, wherein the WL combination comprises an ultra-wide lane (UWL) combination in which an effective wavelength of the UWL combination is greater than 3 m. ### Claim 15 (depends on 9) The GNSS device of claim 9, wherein, to receive the GNSS correction data, the one or more processors are configured to receive real-time kinematic (RTK) or precise point positioning (PPP) correction data. ### Claim 16 (depends on 9) The GNSS device of claim 9, wherein threshold value is 0.25 or less. ### Claim 17 An apparatus for identifying an error in global navigation satellite system (GNSS) correction data for precise positioning of a GNSS device, the apparatus comprising: means for receiving the GNSS correction data from a correction data source; means for obtaining: a first carrier-phase measurement of a first GNSS signal having a first carrier frequency, and a second carrier-phase measurement of a second GNSS signal having a second carrier frequency; means for applying the GNSS correction data to the first carrier-phase measurement, the second carrier-phase measurement, or both; subsequent to applying the GNSS correction data, performing a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement; and means for determining whether the GNSS correction data includes an error based at least in part on whether a difference between a float ambiguity value for the WL combination and a closest integer exceeds a threshold value. ### Claim 18 (depends on 17) The apparatus of claim 17, further comprising means for determining, responsive to determining that the GNSS correction data includes the error, a precise GNSS position estimate of the GNSS device without using the GNSS correction data to for ambiguity resolution. ### Claim 19 (depends on 18) The apparatus of claim 18, further comprising means for outputting the precise GNSS position estimate of the GNSS device to an application, an operation system, a component of the GNSS device, a second device, or any combination thereof. ### Claim 20 (depends on 17) The apparatus of claim 17, further comprising means for determining the float ambiguity value for the WL combination, wherein determining the float ambiguity value for the WL combination comprises solving a geometry component of the WL combination. ### Claim 21 (depends on 17) The apparatus of claim 17, further comprising means for determining the float ambiguity value for the WL combination, wherein determining the float ambiguity value for the WL combination comprises taking a difference between a carrier phase value of the WL combination and a narrow-lane (NL) pseudorange value. ### Claim 22 (depends on 17) The apparatus of claim 17, wherein the WL combination comprises an ultra-wide lane (UWL) combination in which an effective wavelength of the UWL combination is greater than 3 m. ### Claim 23 (depends on 17) The apparatus of claim 17, wherein the means for receiving GNSS correction data comprises means for receiving real-time kinematic (RTK) or precise point positioning (PPP) correction data. ### Claim 24 (depends on 17) The apparatus of claim 17, wherein threshold value is 0.25 or less. ### Claim 25 A non-transitory computer-readable medium storing instructions for identifying an error in global navigation satellite system (GNSS) correction data for precise positioning of a GNSS device, the instructions comprising code for: receiving, at the GNSS device, the GNSS correction data from a correction data source; obtaining, using a multi-band GNSS receiver of the GNSS device: a first carrier-phase measurement of a first GNSS signal having a first carrier frequency, and a second carrier-phase measurement of a second GNSS signal having a second carrier frequency; applying the GNSS correction data to the first carrier-phase measurement, the second carrier-phase measurement, or both; subsequent to applying the GNSS correction data, performing a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement; and determining whether the GNSS correction data includes an error based at least in part on whether a difference between a float ambiguity value for the WL combination and a closest integer exceeds a threshold value. ### Claim 26 (depends on 25) The computer-readable medium of claim 25, wherein the instructions further comprise code for, responsive to determining that the GNSS correction data includes the error, determining a precise GNSS position estimate of the GNSS device without using the GNSS correction data to for ambiguity resolution. ### Claim 27 (depends on 26) The computer-readable medium of claim 26, wherein the instructions further comprise code for outputting the precise GNSS position estimate of the GNSS device to an application, an operation system, a component of the GNSS device, a second device, or any combination thereof. ### Claim 28 (depends on 25) The computer-readable medium of claim 25, wherein the instructions further comprise code for determining the float ambiguity value for the WL combination, wherein determining the float ambiguity value for the WL combination comprises solving a geometry component of the WL combination. ### Claim 29 (depends on 25) The computer-readable medium of claim 25, wherein the instructions further comprise code for determining the float ambiguity value for the WL combination, wherein determining the float ambiguity value for the WL combination comprises taking a difference between a carrier phase value of the WL combination and a narrow-lane (NL) pseudorange value. ### Claim 30 (depends on 25) The computer-readable medium of claim 25, wherein the WL combination comprises an ultra-wide lane (UWL) combination in which an effective wavelength of the UWL combination is greater than 3 m.