Selective active cancellation system for repetitive phenomena

Details Selective active cancellation system for repetitive phenomena Selective active cancellation system for repetitive phenomena

1988-08-30

1989-10-31

Harkcom, Gary V.

Boots, shoes, and leggings

381 71, G06F 1531

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048781886

ABSTRACT:
A cancellation system including a processor having single adaptive filters adapting its filtering characteristic as a function of a phenomena signal and phenomena timing signal and a phase circuit to maintain the adapting of the filtering characteristics within 90 degrees phase of the phenomena signal. The phase circuit has the capability to measure the delays of the processor and the environment.

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patent: 4677676 (1987-06-01), Eriksson
patent: 4677677 (1987-06-01), Eriksson
"Adaptive Noise Cancelling Principles and Applications", Widrow et al., Proceedings of IEEE, vol. 63, No. 12, Dec. 1975, pp. 1692-1716.
"Adaptive Noise Cancelling of Sinusoidal Interferences", Ph.D. Dissertation, Stanford University, Stanford, CA, May 1975, Glover, Jr.

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