Ultra wide-lane (UWL) real-time kinematic (RTK)

1. A method of Global Navigation Satellite System (GNSS) positioning of a mobile device, the method comprising:

obtaining, using a multi-band GNSS receiver of the mobile device:

a first carrier-phase measurement of a first GNSS signal on a first GNSS carrier frequency, and

a second carrier-phase measurement of a second GNSS signal on second GNSS carrier frequency;

determining a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement;

determining a combined carrier phase noise of the WL combination; and

responsive to a determination that the combined carrier phase noise of the WL combination is (i) less than a measured or estimated pseudo-range noise associated with the first GNSS carrier frequency and (ii) less than a measured or estimated pseudo-range noise associated with the second GNSS carrier frequency, providing, with the mobile device, a position estimate of the mobile device, wherein the position estimate is determined from the WL combination.

2. The method of claim 1 , wherein determining the position estimate from the WL combination comprises using the WL combination as an ambiguity constraint for a positioning engine that determines the position estimate.

3. The method of claim 1 , wherein the measured or estimated pseudo-range noise associated with the first GNSS carrier frequency, the measured or estimated pseudo-range noise associated with the second GNSS carrier frequency, or both, comprise an estimated pseudo-range noise.

4. The method of claim 1 , wherein the measured or estimated pseudo-range noise associated with the first GNSS carrier frequency, the measured or estimated pseudo-range noise associated with the second GNSS carrier frequency, or both, comprise a measured pseudo-range noise.

5. The method of claim 1 , further comprising selecting the first GNSS carrier frequency and the second GNSS carrier frequency from a group comprising more than two potential GNSS carrier frequencies, wherein the selecting is based on a signal characteristic of at least one GNSS carrier frequency of the group and wherein the obtaining the first carrier-phase measurement and the second carrier-phase measurement is responsive to the selecting.

6. The method of claim 1 , further comprising resolving a carrier phase ambiguity of the WL combination to determine the position estimate from the WL combination.

7. The method of claim 1 , wherein the WL combination has an effective wavelength 3 meters or greater.

8. The method of claim 1 , wherein the combined carrier phase noise of the WL combination is 2 meters or less.

9. The method of claim 1 , wherein the mobile device comprises a mobile phone.

10. A mobile device for Global Navigation Satellite System (GNSS) positioning of a mobile device, the mobile device comprising:

a multi-band GNSS receiver;

a memory; and

one or more processors communicatively coupled with the multi-band GNSS receiver and the memory, wherein the one or more processors are configured to:

obtain, using the multi-band GNSS receiver:

a first carrier-phase measurement of a first GNSS signal on a first GNSS carrier frequency, and

a second carrier-phase measurement of a second GNSS signal on second GNSS carrier frequency;

determine a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement;

determine a combined carrier phase noise of the WL combination; and

responsive to a determination that the combined carrier phase noise of the WL combination is (i) less than a measured or estimated pseudo-range noise associated with the first GNSS carrier frequency and (ii) less than a measured or estimated pseudo-range noise associated with the second GNSS carrier frequency, provide a position estimate of the mobile device, wherein the position estimate is determined from the WL combination.

11. The mobile device of claim 10 , wherein the one or more processors, when determining the position estimate from the WL combination, are configured to use the WL combination as an ambiguity constraint for a positioning engine that determines the position estimate.

12. The mobile device of claim 10 , wherein the measured or estimated pseudo-range noise associated with the first GNSS carrier frequency, the measured or estimated pseudo-range noise associated with the second GNSS carrier frequency, or both, comprise an estimated pseudo-range noise.

13. The mobile device of claim 10 , wherein the measured or estimated pseudo-range noise associated with the first GNSS carrier frequency, the measured or estimated pseudo-range noise associated with the second GNSS carrier frequency, or both, comprise a measured pseudo-range noise.

14. The mobile device of claim 10 , wherein the one or more processors are further configured to select the first GNSS carrier frequency and the second GNSS carrier frequency from a group comprising more than two potential GNSS carrier frequencies, wherein the selecting is based on a signal characteristic of at least one GNSS carrier frequency of the group and wherein the one or more processors are further configured to perform the obtaining of the first carrier-phase measurement and the second carrier-phase measurement responsive to the selecting.

15. The mobile device of claim 10 , wherein the one or more processors are further configured to resolve a carrier phase ambiguity of the WL combination to determine the position estimate from the WL combination.

16. The mobile device of claim 10 , wherein the mobile device comprises a mobile phone.

17. An apparatus for Global Navigation Satellite System (GNSS) positioning of a mobile device, the apparatus comprising:

means for obtaining, using a multi-band GNSS receiver of the mobile device:

a first carrier-phase measurement of a first GNSS signal on a first GNSS carrier frequency, and

a second carrier-phase measurement of a second GNSS signal on second GNSS carrier frequency;

means for determining a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement;

means for determining a combined carrier phase noise of the WL combination; and

means for providing, with the mobile device and responsive to a determination that the combined carrier phase noise of the WL combination is (i) less than a measured or estimated pseudo-range noise associated with the first GNSS carrier frequency and (ii) less than a measured or estimated pseudo-range noise associated with the second GNSS carrier frequency, a position estimate of the mobile device, wherein the position estimate is determined from the WL combination.

18. The apparatus of claim 17 , further comprising means for determining the position estimate from the WL combination, wherein the means for determining comprises means for using the WL combination as an ambiguity constraint for a positioning engine that determines the position estimate.

19. The apparatus of claim 17 , further comprising means for selecting the first GNSS carrier frequency and the second GNSS carrier frequency from a group comprising more than two potential GNSS carrier frequencies, wherein the selecting is based on a signal characteristic of at least one GNSS carrier frequency of the group and wherein the obtaining the first carrier-phase measurement and the second carrier-phase measurement is responsive to the selecting.

20. The apparatus of claim 17 , further comprising means for resolving a carrier phase ambiguity of the WL combination to determine the position estimate from the WL combination.

21. The apparatus of claim 17 , wherein the mobile device comprises a mobile phone.

22. A non-transitory computer-readable medium storing instructions for Global Navigation Satellite System (GNSS) positioning of a mobile device, the instructions comprising code for:

obtaining, using a multi-band GNSS receiver of the mobile device:

a first carrier-phase measurement of a first GNSS signal on a first GNSS carrier frequency, and

a second carrier-phase measurement of a second GNSS signal on second GNSS carrier frequency;

determining a wide-lane (WL) combination of the first carrier-phase measurement and the second carrier-phase measurement;

determining a combined carrier phase noise of the WL combination; and

responsive to a determination that the combined carrier phase noise of the WL combination is (i) less than a measured or estimated pseudo-range noise associated with the first GNSS carrier frequency and (ii) less than a measured or estimated pseudo-range noise associated with the second GNSS carrier frequency, providing, with the mobile device, a position estimate of the mobile device, wherein the position estimate is determined from the WL combination.

23. The computer-readable medium of claim 22 , wherein determining the position estimate from the WL combination comprises using the WL combination as an ambiguity constraint for a positioning engine that determines the position estimate.

24. The computer-readable medium of claim 22 , wherein the instructions further comprise code for selecting the first GNSS carrier frequency and the second GNSS carrier frequency from a group comprising more than two potential GNSS carrier frequencies, wherein the selecting is based on a signal characteristic of at least one GNSS carrier frequency of the group and wherein the obtaining the first carrier-phase measurement and the second carrier-phase measurement is responsive to the selecting.

25. The computer-readable medium of claim 22 , wherein the instructions further comprise code for resolving a carrier phase ambiguity of the WL combination to determine the position estimate from the WL combination.

26. The computer-readable medium of claim 22 , wherein the mobile device comprises a mobile phone.