Periodic noise canceling system and method

Details Periodic noise canceling system and method Periodic noise canceling system and method

1989-10-11

1991-07-02

Lall, Parshotam S.

Boots, shoes, and leggings

36472419, 364574, G06F 1531

Patent

active

050291181

ABSTRACT:
A system and method for canceling a periodic noise superposed on a real signal component of an original signal. The system comprises: a synchronous adaptive noise canceling filter which sequentially produces and corrects a noise component at each predetermined phase of the original signal in synchronization with a signal having a corelationship to a period of the original signal; a subtractor which subtracts the noise signal component produced by the synchronous adaptive noise canceling filter from the original signal so as to produce the real signal component as a target signal; and a signal generator which produces and sends a signal to the synchronous adaptive noise canceling filter so that the synchronous adaptive noise canceling filter produces a real periodic noise signal component without the real signal component on the basis of the signal component derived previously from the subtractor and original signal.

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Kobatake, "A Synchronous Adaptive Noise Cancelling System for Periodic Interference", Transactions of the Society of Instrument and Control Engineers, vol. 19, No. 3, pp. 34-40, 1983.
Widrow et al, "Adaptive Noise Cancelling: Principles and Application", Proceedings of the IEEE, vol. 63, No. 12, pp. 1692-1716, Dec. 1975.
Glover, Jr., "Adaptive Noise Canceling Applied to Sinusoidal Interference", Dec. 1977, IEEE Vol. ASSP-25, No. 6, pp. 484-491.

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