Multipath distortion reducing circuit

Details Multipath distortion reducing circuit Multipath distortion reducing circuit

1984-06-19

1986-05-20

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455295, 455206, 455 65, H04B 110

Patent

active

045906157

ABSTRACT:
A multipath distortion reducing circuit particularly adapted for use with stereophonic receiving circuits in which the amount of mixing between right and left channels is reduced. In accordance with the invention, the envelope of the received FM signal is AM detected, and the envelope detected circuit is multiplied by the FM detected signal differentiated to provide a distortion cancelling signal. The distortion cancelling signal is summed with the detected FM signal to provide an output having a reduced multipath distortion component.

REFERENCES:
patent: 3176231 (1965-03-01), Vallese et al.
patent: 4166251 (1979-08-01), Ishigaki et al.
patent: 4266296 (1981-05-01), Ishigaki
Ishigaki et al.; "Electronic Reduction of FM Distortion Caused by Multipath Transmission"; I.E.E.E.-Trans. on Consumer Electr.; vol. CE-26, Feb. 1980, pp. 28-35.

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