Vestigial sideband signal decoder

Details Vestigial sideband signal decoder Vestigial sideband signal decoder

1986-04-04

1988-03-08

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

328165, H03D 124

Patent

active

047303450

ABSTRACT:
A technique for decoding a vestigial sideband signal formed from a double-sideband signal having modulated quadrature-related carrier signals is disclosed. Within the receiver, the vestigial sideband signal is demodulated into a pair of received signals. Each of these received signals comprises a data signal which has been distorted by the double-sideband to vestigial sideband transformation. Pursuant to the present invention, each data signal is recovered in response to the associated received signal and the other data signal. Advantageously, the disclosed technique reduces the bandwidth required to transmit a given amount of information in systems which transmit modulated quadrature-related carrier signals.

REFERENCES:
patent: 3443229 (1969-05-01), Becker
patent: 3735266 (1973-05-01), Amitay
patent: 4076956 (1978-02-01), Dogliotti
patent: 4112370 (1978-09-01), Monsen
patent: 4220923 (1980-09-01), Pelchat et al.
patent: 4367555 (1983-01-01), Namiki et al.
patent: 4577330 (1986-03-01), Kavehrad
patent: 4592072 (1986-05-01), Stewart
patent: 4606054 (1986-08-01), Amitay et al.
U.S. patent application Ser. No. 835,265; filed 03/03/86; Peter D. Karabinis Case 11; "Suppressed Double-Sideband Communication System".

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