公开(公告)号：US11378697B2

公开(公告)日：2022-07-05

申请号：US17081973

申请日：2020-10-27

Applicant: QUALCOMM Incorporated

Inventor： Jordan Cookman ,  Krishnaranjan Rao ,  Sandeep Padmanabhan

IPC: G01S19/22 ,  G01S19/42 ,  G01S19/24 ,  G01S19/32

Abstract: Described herein are systems and techniques for mitigating the impact of attenuated satellite signals received at mobile devices. A mobile device receives multiple signals from a single satellite on different carrier frequencies. The mobile device calculates two pseudorange measurements, each pseudorange measurement from a different signal of the multiple signals. The mobile device calculates the difference between the two pseudorange measurements, and if the difference exceeds a first threshold and the first pseudorange measurement is larger than the second pseudorange measurement, the mobile device marks the first pseudorange measurement as impaired. If the difference exceeds a second threshold and the second pseudorange measurement is larger than the first pseudorange measurement, the second pseudorange measurement is marked as impaired. The impaired measurements may be weighted or excluded from use in calculating a position of the mobile device or in another pseudorange measurement based calculation.

公开(公告)号：US11686853B2

公开(公告)日：2023-06-27

申请号：US17809265

申请日：2022-06-27

Applicant: QUALCOMM Incorporated

Inventor： Jordan Cookman ,  Krishnaranjan Rao ,  Sandeep Padmanabhan

IPC: G01S19/22 ,  G01S19/42 ,  G01S19/24 ,  G01S19/32

CPC classification number: G01S19/22 ,  G01S19/24 ,  G01S19/428 ,  G01S19/32

Abstract: In some aspects, a mobile device is configured to obtain a set of satellite signal measurements through measuring, for each satellite in a first plurality of satellites, a first signal from the satellite in a first frequency band and a second signal from the satellite in a second frequency band. The first plurality of satellites can include at least a first satellite, a second satellite, and a third satellite. The mobile device can determine that at least one measurement in the set of satellite signal measurements is impaired, based on a difference between a measurement of the first signal from a particular satellite (e.g., the first satellite, the second satellite, or the third satellite) and a measurement of the second signal from the particular satellite. A position of the mobile device can then be determined based on non-impaired measurements in the set of satellite signal measurements.