Adaptive techniques for automatic frequency determination and me

Details Adaptive techniques for automatic frequency determination and me Adaptive techniques for automatic frequency determination and me

1981-06-15

1983-09-06

Malzahn, David H.

Boots, shoes, and leggings

179 84VF, G06F 1531

Patent

active

044032986

ABSTRACT:
Various implementations of a technique are presented for capitalizing on signal correlation in a manner for providing usable frequency information. In a specific embodiment, a filter (51) is adapted to a signal component of an input signal using a variable generated by an adapter 58. The variable has a prescribed relationship to the frequency of the signal component. The variable is used to weight a combination of signal values derived from past signal history to form a prediction of a future signal. An adder 56 combines the new signal value with the prediction to form an error signal which is used by the filter (51) and the adapter (58). When the filter converges, a frequency indicator (59) using the variable provides an output signal indicative of the frequency of the signal component.

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Feintuch, "An Adaptive Recursive LMS Filter", Proceedings of the IEEE, Nov. 1976, pp. 1622-1624.
Thompson, "A Constrained Recursive Adaptive Filter for Enhancement of Narrowband Signals in White Noise", Conference Record of the Twelfth Asilomar Conference on Ckts., Systems & Computer, Pacific Grove, Ca., Nov. 6-8, 1978.

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