Method and apparatus for saving power in a global postioning system receiver
First Claim
1. A method for conserving power in a positioning system receiver used in connection with a positioning system providing ranging signals, the receiver using the ranging signals to determine a state of motion of the receiver, the method comprising:
- a) a step (32) of performing at least a predetermined number of solutions of the state of motion of the receiver using a filter solution based on a mix of models of the motion of the receiver, a mix that is varied from one solution to the next according to a predetermined criteria, and of providing the model mix used in each solution; and
b) a step (35) of adopting a partial duty cycle indicating a percentage of time selected receiver components are powered on, based on the mix of models used in successive solutions.
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Abstract
A method and apparatus for conserving power in a positioning system receiver using ranging signals to determine a state of motion of the receiver, the method including: a step (32) of performing at least a predetermined number of solutions of the state of motion of the receiver using a filter solution based on a variable mix of models of the motion of the receiver, and of providing the model mix used in each solution; and a step (35) of adopting a partial duty cycle indicating a percentage of time selected receiver components are powered on, based on the mix of models used in successive solutions. Typically, the receiver includes a radiofrequency (RF) front end module and a baseband processor module and the selected components that are powered on and off to save power typically include the RF front end module and the baseband processor module.
93 Citations
8 Claims
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1. A method for conserving power in a positioning system receiver used in connection with a positioning system providing ranging signals, the receiver using the ranging signals to determine a state of motion of the receiver, the method comprising:
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a) a step (32) of performing at least a predetermined number of solutions of the state of motion of the receiver using a filter solution based on a mix of models of the motion of the receiver, a mix that is varied from one solution to the next according to a predetermined criteria, and of providing the model mix used in each solution; and
b) a step (35) of adopting a partial duty cycle indicating a percentage of time selected receiver components are powered on, based on the mix of models used in successive solutions. - View Dependent Claims (2, 3)
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4. An apparatus for conserving power in a positioning system receiver used in connection with a positioning system providing ranging signals, the receiver using the ranging signals to determine a state of motion of the receiver, the apparatus comprising:
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a) means (15) for performing at least a predetermined number of solutions of the state of motion of the receiver using a filter solution based on a mix of models of the motion of the receiver that are varied from one solution to the next according to a predetermined criteria, and for providing the model mix used in each solution; and
b) means (18) for determining a partial duty cycle indicating a percentage of time selected receiver components are powered on, based on the mix of models used in successive solutions. - View Dependent Claims (5, 6)
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7. A system, including:
- a transmitter for transmitting a ranging signal, and a ranging receiver for receiving the ranging signal and for determining a state of motion of the ranging receiver, the ranging receiver characterized in that it includes an apparatus for conserving power that in turn comprises;
a) means (15) for performing at least a predetermined number of solutions of the state of motion of the ranging receiver using a filter solution based on a mix of models of the motion of the ranging receiver that are varied from one solution to the next according to a predetermined criteria, and for providing the model mix used in each solution; and
b) means (18) for determining a partial duty cycle indicating a percentage of time selected ranging receiver components are powered on, based on the mix of models used in successive solutions. - View Dependent Claims (8)
- a transmitter for transmitting a ranging signal, and a ranging receiver for receiving the ranging signal and for determining a state of motion of the ranging receiver, the ranging receiver characterized in that it includes an apparatus for conserving power that in turn comprises;
Specification