System for digitally converting baseband channel signals into a

Details System for digitally converting baseband channel signals into a System for digitally converting baseband channel signals into a

1975-06-20

1982-01-19

Cook, Daryl W.

Multiplex communications

Wide area network

Packet switching

370 70, H04J 100

Patent

active

043120628

ABSTRACT:
System for digitally converting baseband channel signals into a frequency-division multiplex signal. The system comprises at its input converter circuits by each of which the sequence of codewords of the digital signal which correspond to each signal to be converted is divided into two interlaced sequences. The two devices required for processing each of the two digital signals supplied by the input circuits in the form of converters are combined so as to use in cascade a Fourier transformation device, a set of arithmetic units in the form of digital filters and a time-division multiplexer which supplies the desired multiplex signal. Use: multiplex transmission of speech signals.

REFERENCES:
patent: 3403227 (1968-09-01), Malm
patent: 3423729 (1969-01-01), Heller
patent: 3605019 (1971-09-01), Cutter

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