Radio frequency receive chain control for receiving satellite positioning signals

Patent metadata

Field	Value
Publication number	US-11894919-B2
Application number	US-202117411864-A
Country	US
Kind code	B2
Filing date	Aug 25, 2021
Priority date	Aug 25, 2021
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A satellite signal processing method includes: receiving, at a user equipment, a first satellite signal of a first frequency band from at least one satellite of a constellation of satellites; receiving, at the user equipment, a second satellite signal of a second frequency band and from the at least one satellite of the constellation of satellites; and controlling an activation status of at least one of: a first satellite signal receive chain, of the user equipment, configured to measure the first satellite signal; or a second satellite signal receive chain, of the user equipment, configured to measure the second satellite signal.

First claim

The invention claimed is:

1. A user equipment comprising:
a memory;
a controller communicatively coupled to the memory; and
a satellite positioning system receiver communicatively coupled to the controller and comprising:
a first satellite signal receive chain configured to receive a first satellite signal, of a first frequency band, from at least one satellite of a constellation of satellites; and
a second satellite signal receive chain configured to measure a second satellite signal, of a second frequency band, from the at least one satellite of the constellation of satellites;

wherein the controller is configured to control an activation status of at least one of the first satellite signal receive chain or the second satellite signal receive chain, and
wherein the first satellite signal has at least one of fewer associated search hypotheses than the second satellite signal or a smaller bandwidth than the second satellite signal, and wherein the controller is configured to control the first satellite signal receive chain to be active in response to receiving a request to acquire a third satellite signal from the at least one satellite of the constellation of satellites.

2. The user equipment of claim 1 , wherein the controller is configured to control an activation status of at least one component of the second satellite signal receive chain to be inactive based on at least one of a time uncertainty being above a time uncertainty threshold associated with the second satellite signal or a position uncertainty of the user equipment being above a position uncertainty threshold associated with the second satellite signal.

3. The user equipment of claim 1 , wherein the controller is configured to control, while the first satellite signal receive chain is active, the second satellite signal receive chain to become active, and then to control the first satellite signal receive chain to become inactive in response to receiving a request to track the at least one satellite of the constellation of satellites with the second satellite signal.

4. The user equipment of claim 3 , further comprising a processor communicatively coupled to the satellite positioning system receiver and configured to use one or more obtained satellite signal tracking parameters, corresponding to the first satellite signal from the at least one satellite of the constellation of satellites, to track the at least one satellite of the constellation of satellites with the second satellite signal while both the first satellite signal receive chain and the second satellite signal receive chain are active.

5. The user equipment of claim 1 , wherein the controller is configured to control the activation status of the first satellite signal receive chain to be active, and the activation status of the second satellite signal receive chain to be active, in response to receiving a request to validate an acquired satellite signal from the at least one satellite of the constellation of satellites.

6. The user equipment of claim 5 , wherein the controller is configured to control an activation status of at least one component of the second satellite signal receive chain to be inactive in response to validation of the acquired satellite signal.

7. The user equipment of claim 5 , wherein the controller is configured to control, periodically, the second satellite signal receive chain to be active, while the first satellite signal receive chain is active and in response to receiving the request to validate the acquired satellite signal, to validate the acquired satellite signal.

8. A user equipment comprising:
a memory;
a controller communicatively coupled to the memory; and
a satellite positioning system receiver communicatively coupled to the controller and comprising:
a first satellite signal receive chain configured to receive a first satellite signal, of a first frequency band, from at least one satellite of a constellation of satellites; and
a second satellite signal receive chain configured to measure a second satellite signal, of a second frequency band, from the at least one satellite of the constellation of satellites;

wherein the controller is configured to control an activation status of at least one of the first satellite signal receive chain or the second satellite signal receive chain; and
wherein the first satellite signal has a smaller bandwidth than the second satellite signal, and wherein the controller is configured to control the second satellite signal receive chain to be active, and at least one component of the first satellite signal receive chain to be inactive, in response to receiving a request to track the at least one satellite of the constellation of satellites with the second satellite signal.

9. The user equipment of claim 8 , wherein the controller is configured to control the second satellite signal receive chain to be active, and the at least one component of the first satellite signal receive chain to be inactive, based on determining that a time uncertainty of the user equipment is below a time uncertainty threshold and a position uncertainty of the user equipment is below a position uncertainty threshold.

10. A user equipment comprising:
a memory;
a controller communicatively coupled to the memory; and
a satellite positioning system receiver communicatively coupled to the controller and comprising:
a first satellite signal receive chain configured to receive a first satellite signal, of a first frequency band, from at least one satellite of a constellation of satellites; and
a second satellite signal receive chain configured to measure a second satellite signal, of a second frequency band, from the at least one satellite of the constellation of satellites;

wherein the controller is configured to control an activation status of at least one of the first satellite signal receive chain or the second satellite signal receive chain,
wherein the controller is configured to control the first satellite signal receive chain to be active, and the second satellite signal receive chain to be active, in response to receiving a request to determine an ionospheric delay from the at least one satellite of the constellation of satellites.

11. The user equipment of claim 10 , wherein the controller is configured to control, periodically, the second satellite signal receive chain to be active while the first satellite signal receive chain is active and in response to receiving the request to determine the ionospheric delay.

12. A user equipment comprising:
a memory;
a controller communicatively coupled to the memory; and
a satellite positioning system receiver communicatively coupled to the controller and comprising:
a first satellite signal receive chain configured to receive a first satellite signal, of a first frequency band, from at least one satellite of a constellation of satellites; and
a second satellite signal receive chain configured to measure a second satellite signal, of a second frequency band, from the at least one satellite of the constellation of satellites;

wherein the controller is configured to control an activation status of at least one of the first satellite signal receive chain or the second satellite signal receive chain; and
wherein the controller is configured to control at least one of the first satellite signal receive chain to be active, or the second satellite signal receive chain to be active, or a combination thereof, based on:
signal acquisition speeds associated with acquiring the first satellite signal and acquiring the second satellite signal, and a desired satellite signal acquisition speed; or
position accuracy associated with the first satell

Assignees

• Qualcomm Inc

Inventors

• Pon Rayman
• Iyengar Pranav
• Zhao Liang

Classifications

• G01S19/21

  Interference related issues {; Issues related to cross-correlation, spoofing or other methods of denial of service} · CPC title

• H04W88/02

  Terminal devices · CPC title

• H04W76/25

  Maintenance of established connections · CPC title

• H04W64/003

  locating network equipment · CPC title

• H04B7/22

  Scatter propagation systems {, e.g. ionospheric, tropospheric or meteor scatter} · CPC title