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

1984-03-20

Chin, Gary

Boots, shoes, and leggings

364484, 328138, G06F 1534

Patent

active

044385048

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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patent: 4034196 (1977-07-01), Butterweck et al.
patent: 4213187 (1980-07-01), Lawrence et al.
patent: 4236224 (1980-11-01), Chang
patent: 4245325 (1981-01-01), Kikuchi et al.
patent: 4277650 (1981-07-01), Arend et al.
patent: 4351032 (1982-09-01), Challen
patent: 4356558 (1982-10-01), Owen et al.
"Digital MF Receiver Using Discrete Fourier Transform", by Koval et al., Published in IEEE Transactions on Communications, vol. COM-21, No. 12, Dec. 1973, pp. 1331-1335.

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