Communication system for bi-phase transmission of data and havin

Details Communication system for bi-phase transmission of data and havin Communication system for bi-phase transmission of data and havin

1983-12-12

1986-02-25

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 87, 375101, 360 42, H04B 166, H03C 300, H03D 300

Patent

active

045731691

ABSTRACT:
A data communication system for transmission of bi-phase signals modulated by data symbols and in which the signals are filtered in accordance with a frequency response which approximates zero at 0 H.sub.z and at and exceeding the frequency 3/(2T) H.sub.z and which has an approximately sinusoidal variation between those frequencies, T being the symbol interval. This filter characteristic minimizes intersymbol interference and improves the signal-to-noise ratio. The requisite filtering may be provided in the receiver or in part in the receiver and in part in the transmitter of the communication system.

REFERENCES:
patent: 3441921 (1969-04-01), Jacoby
patent: 3892916 (1975-07-01), Boulter
patent: 4123710 (1978-10-01), Stuart et al.
patent: 4142065 (1979-02-01), Tannhauser
patent: 4313203 (1982-01-01), van Gerwen et al.
patent: 4317212 (1982-02-01), van Gerwen et al.
"Differentiate", Data Communications Dictionary, Charles J. Sippl, van Nostrand Reinhold Co., 1976.

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