Unwanted signal suppression device

Details Unwanted signal suppression device Unwanted signal suppression device

1992-06-19

1994-04-19

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307521, 36472401, H04K 300, H03K 1300

Patent

active

053049403

ABSTRACT:
An unwanted signal suppression device is disclosed for suppressing unwanted signals in input signals containing desired and unwanted signals. The input signals are divided into segments in the time domain. The device includes a unit for detecting the segment having maximum power, a unit for computing reflection coefficients on the basis of the segments except the detected power segment, and a lattice filter for suppressing the unwanted signals by using the computed reflection coefficients. A second device includes a reflection coefficient computing unit, a median filter and a lattice filter. A third device includes a unit for estimating unwanted signals frequency, a filter for computing filter weights on the basis of the estimated frequency and filter coefficients and for applying the computed weights to the input signals so as to suppress the unwanted signals.

REFERENCES:
patent: 4091236 (1978-05-01), Chen
patent: 4349916 (1982-09-01), Roeder
patent: 4544919 (1985-10-01), Gerson
patent: 4587620 (1986-05-01), Niimi et al.
patent: 4695970 (1987-09-01), Renner et al.
patent: 4719649 (1988-01-01), Woodsum et al.
patent: 4939473 (1990-07-01), Eno

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