Multiple channel data link system

Details Multiple channel data link system Multiple channel data link system

1982-06-30

1985-01-15

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 40, 455 52, 455 59, 455315, H04B 702

Patent

active

044942389

ABSTRACT:
A coherent communications link for simultaneously transmitting intelligence on a plurality of non-contiguous frequency channels by means of a plurality of coherent carrier signals which are connected to a single composite intermediate frequency signal upon reception by a fully coherent receiver. The local oscillator signals in the receiver are maintained coherent with respect to the transmitted carrier signals responsive to the composite IF signal while each of the local oscillator signals is adjusted to maintain coherence of each received carrier in the face of relatively long term drift due to thermal shifts, path effects and hardware drift.

REFERENCES:
patent: 3214691 (1965-10-01), Sproul et al.
patent: 3593147 (1971-07-01), Gurak et al.
patent: 3624513 (1971-11-01), Costas
patent: 3714573 (1973-01-01), Grossman
patent: 4063173 (1977-12-01), Nelson et al.
patent: 4146838 (1979-03-01), Takada
patent: 4361891 (1982-11-01), Lobenstein et al.

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