Intermittent tracking for GNSS
First Claim
1. A GNSS receiver comprising:
- a position calculation and reporting module; and
a tracking and acquisition module, said GNSS receiver adapted to enter a low-power mode following each tracking phase, or each acquisition and tracking phase, said GNSS receiver being further adapted to exit the low-power mode in response to instructions from a control unit to calculate a position of the GNSS receiver and to reenter the low-power mode after the position of the GNSS receiver is calculated, wherein the position of the GNSS receiver is calculated and reported only in response to instructions from the control unit.
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Accused Products
Abstract
A GNSS system operates intermittently and has adaptive activity and sleep time in order to reduce power consumption. The GNSS system provides an enhanced estimate of its position in the absence of GNSS signals of sufficient strength. The user'"'"'s activity and behavior is modeled and used to improve performance, response time, and power consumption of the GNSS system. The user model is based, in part, on the received GNSS signals, a history of the user'"'"'s positions, velocity, time, and inputs from other sensors disposed in the GNSS system, as well as data related to the network. During each activity time, the GNSS receiver performs either tracking, or acquisition followed by tracking. The GNSS receiver supports both normal acquisition as well as low-power acquisition.
31 Citations
30 Claims
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1. A GNSS receiver comprising:
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a position calculation and reporting module; and a tracking and acquisition module, said GNSS receiver adapted to enter a low-power mode following each tracking phase, or each acquisition and tracking phase, said GNSS receiver being further adapted to exit the low-power mode in response to instructions from a control unit to calculate a position of the GNSS receiver and to reenter the low-power mode after the position of the GNSS receiver is calculated, wherein the position of the GNSS receiver is calculated and reported only in response to instructions from the control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of operating a GNSS receiver comprising a position calculation and position reporting module, and a tracking and acquisition module, the method comprising:
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causing the GNSS receiver to enter a low-power mode following each acquisition phase, or each tracking/acquisition phase; causing the GNSS receiver to exit the low-power mode in response to instructions from a control unit to calculate a position of the GNSS receiver, wherein the position of the GNSS receiver is calculated and reported only in response to instructions from the control unit; and causing the GNSS receiver to enter the low-power mode after calculating and reporting the position of the GNSS receiver. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification