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GPS pseudolite and receiver system using high anti-jam pseudolite signal structure

  • US 6,031,487 A
  • Filed: 03/25/1998
  • Issued: 02/29/2000
  • Est. Priority Date: 03/25/1998
  • Status: Expired due to Term
First Claim
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1. A global positioning system (GPS) type navigation system comprising:

  • a first pseudolite transmitter adapted to transmit a first phase modulated L-band signal at a first signal pulse repetition rate, the first phase modulated L-band signal being modulated with a short period code having a code epoch of at least about one millisecond, the first signal pulse repetition rate having a first period time duration associated therewith, wherein for each of a plurality of consecutive transmission intervals having the first period time duration the pseudolite transmitter transmits the first phase modulated L-band signal during less than about one half of the first period time duration, and for at least about 1 millisecond so that the first pseudolite transmits an epoch of the short period code during each transmission pulse; and

    a receiver adapted to receive the first phase modulated L-band signal.

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