Control and features for satellite positioning system receivers
First Claim
Patent Images
1. A satellite positioning receiver enabled device comprising:
- a first subsystem within the satellite positioning receiver enabled device;
a second subsystem within the satellite positioning receiver enabled device; and
a semaphore of bits that contains a first set of bits associated with the first subsystem and a second set of bits associated with the second subsystem where the first subsystem and the second subsystem communicate using the first set of bits and the second set of bits contained in the semaphore of bits.
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Abstract
Control and feature systems for processing signals from a satellite positioning system include an expert system receiver manager; a joint detection, carrier centering and bit sync acquisition subsystem; peak detection; a multi-dimensional measurement interpolation subsystem; a subsystem for mode switching between a navigational signal; and power control module for a receiver.
138 Citations
35 Claims
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1. A satellite positioning receiver enabled device comprising:
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a first subsystem within the satellite positioning receiver enabled device; a second subsystem within the satellite positioning receiver enabled device; and a semaphore of bits that contains a first set of bits associated with the first subsystem and a second set of bits associated with the second subsystem where the first subsystem and the second subsystem communicate using the first set of bits and the second set of bits contained in the semaphore of bits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of communicating between subsystems within a satellite positioning receiver enabled device comprising:
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associating a first set of bits in a semaphore with a first subsystems within the satellite positioning receiver; associating a second set of bits in a semaphore with a second subsystem; and communicating between the first subsystem and the second subsystem with the semaphore of bits. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A signal-bearing medium with machine-readable instructions for communicating between subsystems within a satellite positioning receiver, the instructions comprising:
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instructions for associating a first set of bits in a semaphore with a first subsystems within the satellite positioning receiver; instructions for associating a second set of bits in a semaphore with a second subsystem; and instructions for communicating between the first subsystem and the second subsystem with the semaphore of bits. - View Dependent Claims (17, 18, 19, 20)
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21. A satellite positioning receiver comprising:
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a first subsystem within the satellite positioning receiver that processes satellite positioning signals into processed satellite signals; a second subsystem that receives processed satellite positioning signals; and a structure that enables the processed satellite positioning signals to be passed from the first subsystem to the second subsystem, where the data structure has a first circular data structure that receives the processed satellite signals and a second circular data structure that makes the processed satellite signals available to the second subsystem. - View Dependent Claims (22, 23, 24)
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25. A satellite positioning receiver, comprising:
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a signal processing subsystem having a signal input; a Fast Fourier Transfer (FFT) subsystem; and a signal tracking loop that receives parameters from the FFT subsystem and adjust the signal input to the signal processing subsystem and is controlled by an oscillator and augmented by a software tracking loop. - View Dependent Claims (26, 27)
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29. A satellite positioning receiver, comprising:
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an input subsystem; a Fast Fourier Transfer (FFT) subsystem; a signal processing subsystem; and a power control means that enables at least one of the input subsystem, Fast Fourier Transfer subsystem, and the signal processing subsystem to be placed in a reduced power state while the other subsystems are operating at normal power.
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30. The satellite positioning receiver, where the power control means further includes:
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a first signaling bit that signals a reduced power state associated with the FFT subsystem; and a second signaling bit that signals a reduced power state associated with the signal processing subsystem.
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31. A method of controlling a satellite positioning receiver in receipt of satellite positioning signals, comprising:
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determining a search strategy for acquiring the satellite positioning signals; configuring the satellite positioning receiver in accordance with the search strategy; processing the satellite positioning signals storing a plurality of data associated with the processing of the satellite positioning signal in a memory periodically; and enabling power control of the satellite receiver based on the processing of the satellite positioning signals and the plurality of data in the memory. - View Dependent Claims (32)
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34. A method of synchronization in a satellite positioning receiver, comprising:
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receiving a positioning signal at a receiver; summing samples of positioning signals received at the satellite positioning receiver within a pre-selected range over a moving window of pre-selected length resulting in a plurality of different hypothesis; filling a plurality of bins with the sum of linear envelope over successive data bits where each bin is associated with one of the plurality of different hypothesis; determining the bin with the largest magnitude; and outputting a bit location for synchronization that enables the receiver to synchronize to the satellite positioning signal. - View Dependent Claims (35)
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Specification