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Phase weighted adaptive processor

  • US 4,417,249 A
  • Filed: 09/08/1980
  • Issued: 11/22/1983
  • Est. Priority Date: 09/08/1980
  • Status: Expired due to Term
First Claim
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1. An adaptive processor system of the type employed to eliminate undesired signals, comprising:

  • a first signal path having an undesirable reference signal thereon,a second signal path having an attenuated and delayed replica of said undesired reference signal thereon, which is processed to track said reference signal,a phase tracking feedback path connected in parallel with said second signal path and adapted to shift the phase of said attenuated and delayed replica of said undesired reference signal in said second path to equal the phase of said reference signal,said phase tracking feedback path comprising therein, a voltage controlled oscillator and a delay coupled to the output of said voltage controlled oscillator,the output of said delay being phase shifted as a function of the frequency of said voltage controlled oscillator to provide a phase shifted oscillator output signal, andmeans in said second signal path for coupling said oscillator output signal and said phase shifted oscillator output signal to the attenuated and delayed replica of said reference signal to provide a phase shifted attenuated and delayed replica signal in phase with said reference signal.

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