• An adaptive canceller filter module having signal sensors and signal filters in a circuit for use with filtered-x algorithms to adapt the coefficients of one of said filters to minimize the measure of the error.

U.S. REFERENCES: none

EXEMPLARY CLAIM(s): Show all 10 claims

• 1. An adaptive canceller filter module means for use with filtered-X algorithms in active noise cancellation systems, said module means comprising:
• • a first signal sensor means to receive a reference signal;
  • a first filter means adapted to produce a cancellation signal in response to said reference signal;
  • a second filter means adapted to filter the reference signal produced by the first filter means, the impulse response of which models at least the phase characteristics of the external environment and produces an output signal;
  • second signal sensor means to receive an error signal; and
  • adaptive means using an adaptive output signal of said second filter means and said error signal to adapt the coefficients of said first filter means to minimize a measure of error.

RELATED U.S. APPLICATIONS: none

FOREIGN APPLICATION PRIORITY DATA: none
FOREIGN REFERENCES: none
OTHER REFERENCES: none
PRIMARY/ASSISTANT EXAMINERS: Mai; Tan V.;
ADDED TO DATABASE: Nov. 5 , 1996