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Robust low-frequency spread-spectrum navigation system

  • US 7,876,267 B2
  • Filed: 10/30/2009
  • Issued: 01/25/2011
  • Est. Priority Date: 10/17/2006
  • Status: Expired due to Fees
First Claim
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1. A radiolocation receiver, comprising:

  • a first decoder configured to receive an input comprising radiolocation data from a plurality of different transmitters, where the first decoder is configured to demodulate the input and extract radiolocation data transmitted from at least one transmitter of the plurality of transmitters;

    a remodulator coupled to an output of the first decoder and configured to remodulate an output signal received from the first decoder;

    a summer coupled to an output of the remodulator and configured to subtract an output signal of the remodulator from the input received at the first decoder; and

    a second decoder coupled to an output of the summer and configured to demodulate an output signal of the summer and extract radiolocation data transmitted from at least one other transmitter.

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