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Non-linear echo cancellation of data signals

  • US 4,669,116 A
  • Filed: 12/09/1982
  • Issued: 05/26/1987
  • Est. Priority Date: 12/09/1982
  • Status: Expired due to Fees
First Claim
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1. An echo cancellation circuit comprisingmeans connected to receive a first bit stream corresponding to a first transmitted multilevel data signal,means connected to receive a second transmitted data signal, said second data signal including a echo portion of said first transmitted data signal having linear and non-linear components,means for processing said first bit stream to generate an approximate echo replica of said echo portion of said second signal, said processing means includingmeans for forming a set of N linear tap output signals,means for forming a set of M-N non-linear tap output signals wherein M is greater than N but less than or equal to 2N, andlogic means for summing said linear and non-linear output signals to yield said approximate echo replica.

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