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Cross correlation detection in a satellite navigation receiver

  • US 9,864,065 B2
  • Filed: 09/08/2013
  • Issued: 01/09/2018
  • Est. Priority Date: 07/08/2013
  • Status: Active Grant
First Claim
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1. A method for detecting cross correlation in a satellite navigation receiver in real time, comprising:

  • providing a system for said detection of said cross correlation in said satellite navigation receiver in real time, said system comprising;

    at least one processor;

    a navigation signal reception unit;

    a non-transitory computer readable storage medium communicatively coupled to said at least one processor and storing modules of said satellite navigation receiver, said at least one processor configured to execute said modules of said satellite navigation receiver, said modules of said satellite navigation receiver comprising a data extraction module, a comparison module and a cross correlation detection module;

    receiving navigation signals from a plurality of satellites, by said navigation signal reception unit, wherein said navigation signal reception unit comprises a plurality of input channels, wherein each of said plurality of input channels receives a navigational signal from one of said plurality of satellites, and wherein each of said received navigation signals comprises sub-frames of navigation data;

    extracting ephemeris data from said sub-frames of said navigation data received via each of said input channels, by said data extraction module, wherein ephemeris data extracted from said sub-frames of said navigation data received via each of said input channels is stored separately in a database;

    comparing ephemeris data extracted from said sub-frames of said navigation data received via each of said input channels with ephemeris data extracted from said sub-frames of said navigation data received via each of other of said input channels, by said comparison module; and

    detecting said cross correlation between said received navigation signals, by said cross correlation detection module, when ephemeris data extracted from said sub-frames of said navigation data received via any of said input channels matches with ephemeris data extracted from said sub-frames of said navigation data received via another of said input channels.

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