Multipath fade equalizer

Details Multipath fade equalizer Multipath fade equalizer

1980-06-11

1982-05-18

Gensler, Paul L.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

307262, 307264, 455304, 455305, H03H 1106

Patent

active

043307647

ABSTRACT:
An adaptive multipath fade equalizer is disclosed comprising differencing means (24) for forming a difference between an input equal to said equalizer and a component of the equalizer output signal and a feedback loop (21) for coupling said component of output signal to the differencing means. The feedback loop includes a fixed delay T (22), a variable attenuator (23) and a variable phase shifter (25). A phase control network (30) and an attenuation control network (31) compare selected portions of the frequency spectrum of the signal and adjust the variable controls to minimize the effects of multipath fades upon the signal. It is an advantage of the equalizer that it automatically adjusts for changes in the frequency and depth of the fade notch.

REFERENCES:
patent: 2896176 (1959-07-01), Bellows, Jr.
patent: 3321719 (1967-05-01), Kaenel
patent: 3447103 (1969-05-01), Port
patent: 3638134 (1972-01-01), Beurrier et al.
patent: 4261056 (1981-04-01), Barnett et al.

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