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System for preventing global positioning satellite signal reception to unauthorized personnel

  • US 5,822,429 A
  • Filed: 09/17/1996
  • Issued: 10/13/1998
  • Est. Priority Date: 09/17/1996
  • Status: Expired due to Fees
First Claim
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1. A system for preventing reception and recognition of global positioning satellite (GPS) signals by unauthorized receivers comprising:

  • a jamming unit including transmitter means for transmitting plural GPS jamming signals over a geographic area, and transmitter encryption means for enabling said transmitter means to transmit said plural GPS jamming signals in accordance with an encrypted sequence;

    one or more receiver units, each receiver unit including GPS jamming signal suppression means for receiving GPS jamming signals and GPS signals and for suppressing said GPS jamming signals to enable detection of the GPS signals, suppression encryption means for enabling said jamming signal suppression means to suppress each of said plural GPS jamming signals in accordance with an encrypted sequence identical to the encrypted sequence of said transmitter encryption means, and GPS signal receiving means for receiving the GPS signals detected by said GPS jamming signal suppression means.

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