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Spread spectrum transmitter and communications system using multiple spreading codes

  • US 5,790,591 A
  • Filed: 05/01/1995
  • Issued: 08/04/1998
  • Est. Priority Date: 11/01/1993
  • Status: Expired due to Term
First Claim
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1. A spread spectrum transmitter comprising:

  • a shift register having a plurality of stages including a first stage,a plurality of taps connected to selected ones of said stages,a plurality of exclusive-OR gates connected to said taps, each exclusive-OR gate outputting a different spread spectrum code, said exclusive-OR gates thereby collectively outputting a plurality of spread spectrum codes, andmeans for selecting, in response to a data signal, one of said spread spectrum codes for transmission, said one selected spread spectrum code being fed back from said means for selecting into the first stage of said shift register.

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