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Receiver calibration technique for global orbiting navigation satellite system (GLONASS)

  • US 6,363,123 B1
  • Filed: 02/23/1999
  • Issued: 03/26/2002
  • Est. Priority Date: 02/23/1999
  • Status: Expired due to Term
First Claim
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1. A global orbiting satellite system (GLONASS) receiver, comprising:

  • an antenna subsystem for receiving signals from a plurality of orbiting satellites;

    a conventional receiver channel coupled to the antenna subsystem, the receiver channel being designed to receive, filter and digitally select the frequencies of signals from the plurality of orbiting satellites, wherein the satellites are distinguished by the use of different carrier frequencies and the receiver channel includes a bandpass filter; and

    a calibration channel, including a single narrow bandpass filter centered at a selected intermediate frequency, and means for processing signals from each of the satellites in turn through the single filter, to provide for each channel a reference carrier phase measurement that is independent of effects arising from group delay variation introduced by the bandpass filter in the receiver channel.

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