Receiving apparatus for messages with in-band signals

Details Receiving apparatus for messages with in-band signals Receiving apparatus for messages with in-band signals

1980-02-08

1981-05-19

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370119, H04J 1500

Patent

active

042689147

ABSTRACT:
Receiving apparatus for a message occupying a message frequency band which simultaneously may include noise, and includes one or more unmodulated or amplitude-modulated double-sideband constant-frequency carriers with or without carrier suppression as periodic signals, which uses sampling and reconstruction circuits to deliver the message substantially free from the periodic signals, and to deliver each periodic signal substantially free from noise, the message and any other periodic signal present in the message frequency band.

REFERENCES:
patent: 4178553 (1979-12-01), Fisher et al.
patent: 4182932 (1980-01-01), Fisher et al.
Reference Data for Radio Engineers, New York, 1969, pp. 21-13 & 21-14.
Stephen Prigozy, "Zero-Crossing Detector Provides Fast Sync Pulses", Electronics, Apr. 19, 1965, p. 91.
Philip Panter, Modulation, Noise, and Spectral Analysis, McGraw-Hill, 1965, pp. 506 to 547.
T. R. Ferrara, "Delayed Output Pulse Generator", EEE 13:10, p. 71, summarized in Marcus, Sourcebook of Electronic Circuits, New York, 1968, p. 529.

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