Method and apparatus for reduction of unwanted feedback

Details Method and apparatus for reduction of unwanted feedback Method and apparatus for reduction of unwanted feedback

2006-02-14

2006-02-14

Pendleton, Brian T. (Department: 2644)

Electrical audio signal processing systems and devices

Feedback suppression

Reexamination Certificate

active

06999594

ABSTRACT:
An RF active deflector is described for use with orthogonal frequency division multiplex signals. An input antenna receives an RF input signal and an output antenna transmits an RF signal on substantially the same frequency as the input signal. An amplification path between the input antenna and the output antenna provides substantially linear processing and includes a delay. Means responsive to the signal in the amplification path produce a plurality of control coefficients. A transversal filter receives the signal in the amplification path and, under control by the control coefficient, provides a modified signal. A combiner is provided for combining the modified signal with the signal in said amplification path so as to reduce the effect of the feedback.

REFERENCES:
patent: 5091952 (1992-02-01), Williamson et al.
patent: 5259033 (1993-11-01), Goodings et al.
patent: 5680467 (1997-10-01), Hansen
patent: 6269165 (2001-07-01), Stott et al.

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