US 12,487,369 B2
Integer ambiguity search space reduction
Jean-Michel Raymond-Marie Rousseau, San Diego, CA (US); and Ning Luo, Cupertino, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM INCORPORATED, San Diego, CA (US)
Filed on May 7, 2024, as Appl. No. 18/656,875.
Application 18/656,875 is a continuation of application No. 17/479,825, filed on Sep. 20, 2021, granted, now 12,038,517.
Prior Publication US 2024/0288591 A1, Aug. 29, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 19/44 (2010.01); G01S 13/87 (2006.01); G01S 19/46 (2010.01); H04W 4/029 (2018.01)
CPC G01S 19/44 (2013.01) [G01S 13/876 (2013.01); G01S 19/46 (2013.01); H04W 4/029 (2018.02)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a receiver;
a memory; and
a processor communicatively coupled to the receiver and the memory and configured to:
obtain a code phase measurement of a satellite vehicle signal received via the receiver, the satellite vehicle signal comprising a pseudorandom noise code and a carrier signal;
obtain spatial information corresponding to a wireless terrestrial signal transferred between the apparatus and a terrestrial base station; and
determine a satellite positioning system carrier phase integer ambiguity search space based on an intersection region that is an intersection of a satellite positioning system error space, based on the code phase measurement, and an uncertainty region of a location of the apparatus corresponding to the spatial information.