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Cross-correlated quadrature modulated spread spectrum, OFDM and position finder system

DC
  • US 7,899,491 B2
  • Filed: 12/14/2008
  • Issued: 03/01/2011
  • Est. Priority Date: 08/03/2005
  • Status: Expired due to Fees
First Claim
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1. A position finder and communication system comprising:

  • a first processor for receiving and processing multiple signals received from multiple locations and for generating from said received signals a processed position finder signal;

    a second processor, comprising a first cross-correlator and a transmit baseband filter, for generating cross-correlated in-phase and quadrature-phase processed filtered baseband signals from an input signal;

    a third processor, comprising a spread spectrum processor and a second cross-correlator, for generating cross-correlated in-phase and quadrature-phase processed spread spectrum signals;

    a fourth processor comprising an orthogonal frequency division processor for generating a orthogonal frequency division processed signal;

    a fifth processor for generating a signal from a processing of the processed position finder signal generated by the first processor, with one or more of the signals generated by the second, third and fourth processors;

    a quadrature modulator for quadrature modulation of the signal generated by the fifth processor; and

    a transmitter for transmission of the quadrature modulated signal.

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