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Position fixing system

  • US 20030058924A1
  • Filed: 09/05/2002
  • Published: 03/27/2003
  • Est. Priority Date: 09/05/2001
  • Status: Active Grant
First Claim
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1. A method of producing an ultra-wideband signal in which (I) a carrier signal is modulated by a spreading waveform which is a periodic deterministic wideband signal and (II) the frequency of the carrier signal is changed by a predetermined amount at predetermined intervals (the reciprocal of this interval being the hopping rate), wherein there is a harmonic relationship between the carrier frequency, the predetermined amount of frequency change, and the period of the spreading waveform.

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