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Control and features for satellite positioning system receivers

  • US 9,869,770 B2
  • Filed: 12/12/2014
  • Issued: 01/16/2018
  • Est. Priority Date: 09/02/2003
  • Status: Active Grant
First Claim
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1. A satellite positioning receiver, comprising:

  • a signal processing subsystem including a signal input and configured to process an inputted signal at the signal input and output the processed signal;

    a Fast Fourier Transfer (FFT) subsystem configured to receive the processed signal, determine parameters from the processed signal, and output the determined parameters;

    a hardware tracking loop configured to receive the determined parameters from the FFT subsystem and determine one or more corrections for adjusting the signal input to the signal processing subsystem, wherein the hardware tracking loop is controlled by an oscillator;

    a processor; and

    a memory coupled to the processor, the memory including one or more instructions that when executed by the processor, cause the satellite positioning receiver to implement a software tracking loop for selectively assisting the hardware tracking loop in determining the one or more corrections for adjusting the signal input to the signal processing subsystem.

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