Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Patent
1979-05-18
1981-01-06
Tokar, Michael J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Analysis of complex waves
324 77H, 324 78F, 324 77B, G01R 2316
Patent
active
042439353
ABSTRACT:
An adaptive detector comprises an adaptive linear prediction filter (ALPF) nd a detection processor.
The adaptive filter comprises an input filter, adapted to receive an input signal x(k) and delay it by a time .DELTA.. An L-point, or L-tap, adaptive filter has an input connected to the output of the input filter, a signal r(k) appearing at the output of the filter. A means for summing has two inputs, one for receiving the signal x(k) and the other for receiving an inverted signal from the adaptive filter, the output of the summer being an error signal .epsilon.(k). A feedback amplifier, whose input is connected to the output of the summer, takes a portion 2.mu., of the output signal .epsilon.(k) and feeds it back to the adaptive filter, thereby modifying the tap weights of the adaptive filter.
The detection processor comprises a circuit, whose input is connected to the output of the adaptive filter, to receive the signal r(k), for performing a K-point discrete Fourier transform (DFT) on the signal r(k). A spectral analyzer, whose input is connected to the output of the DFT circuit, performs a spectral analysis on the output signal.
REFERENCES:
patent: 3636333 (1972-01-01), Klund
patent: 3702393 (1972-11-01), Fuss
patent: 3792245 (1974-02-01), Hocker
patent: 3875500 (1975-04-01), Fletcher 324
patent: 4080661 (1978-03-01), Niwa
patent: 4093989 (1978-06-01), Flink
Chabries Douglas M.
Hearn Robert H.
McCool John M.
Moore Randall H.
Widrow Bernard
Johnston Ervin F.
Sciascia Richard S.
Stan John
The United States of America as represented by the Secretary of
Tokar Michael J.
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