Noise reducing circuit for a receiver using a fuzzy controller

Details Noise reducing circuit for a receiver using a fuzzy controller Noise reducing circuit for a receiver using a fuzzy controller

1990-12-19

1993-11-16

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Squelch

4552262, 4552263, 455296, 395 3, H04B 110

Patent

active

052631842

ABSTRACT:
A noise reducing circuit for a receiver such as an FM receiver which is improved in noise reducing effect while reducing an unfamiliar feeling to and an erroneous operation of the receiver. The noise reducing circuit comprises fuzzy inference means for fuzzy inferring, using an input vector consisting of several factors defining a receiving input condition as a prerequisite, in accordance with fuzzy production rules provided by membership functions of the factors of the input vector, and a fuzzy controlling signal generating circuit for generating a fuzzy controlling signal for controlling a control object amount of any one of a separation control circuit, a frequency characteristic control circuit and muting circuit or each of any combination of the circuits in accordance with a result of inference produced by the fuzzy inference means.

REFERENCES:
patent: 3979679 (1976-09-01), Bush et al.
patent: 4006419 (1977-02-01), Liman
patent: 4833715 (1989-05-01), Sakai
patent: 4864490 (1989-09-01), Nomoto et al.
Watanabe, "A VLSI Fuzzy Logic Controller with Reconfigurable, Cascadable Architecture" Apr. 1990 IEEE Journal of Solid State Circuits pp. 376-382.
Zadeh, "Fuzzy Logic", Apr. 1988, IEEE pp. 83-92.

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