Channel selection apparatus

Details Channel selection apparatus Channel selection apparatus

1976-11-16

1980-06-24

Martin, John C.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

364200, H04B 106

Patent

active

042097517

ABSTRACT:
A channel selection apparatus wherein digitized voltages corresponding to frequencies of respective channel or boundary frequencies each between respective adjacent channels are Hadamard transformed and stored, which are subsequently inverse-Hadamard transformed to reproduce the digitized voltages, which are then used for channel selection or channel indication.

REFERENCES:
patent: 3593801 (1976-04-01), Podowski
patent: 3792355 (1974-02-01), Miyata et al.
patent: 3810019 (1974-05-01), Miller
patent: 3940702 (1976-02-01), Yoshimura et al.
patent: 3984626 (1976-10-01), Mounts et al.
patent: 3990027 (1976-11-01), Kawashima
patent: 4001563 (1977-01-01), Bied-Charreton et al.
patent: 4001564 (1977-01-01), Bied-Charreton et al.
patent: 4011514 (1977-03-01), Wroblewski
patent: 4013957 (1977-03-01), Tojo
patent: 4080659 (1978-03-01), Francini

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