Digital communication system

Details Digital communication system Digital communication system

1985-08-22

1988-02-16

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 57, 375 86, 455 65, H04L 2713

Patent

active

047260386

ABSTRACT:
The present invention provides a communication system which employs a signal whose carrier phase is shifted by a constant amount .DELTA..theta. per time slot in correspondence to each symbol (1 or 0) transmitted, and the phase shift is performed by .DELTA..theta./2 (or -.DELTA..theta./2) in the first 1/2 time slot and further by .DELTA..theta./2 (or -.DELTA..theta./2) in the second 1/2 time slot thereby to improve the bit error rate in multipath propagation.

REFERENCES:
patent: 3419804 (1968-12-01), Gorog et al.
patent: 3914695 (1975-10-01), Giusto
patent: 4130802 (1978-12-01), Nossen et al.
patent: 4174505 (1979-11-01), Querry
patent: 4229821 (1980-10-01), Jager et al.
patent: 4584693 (1986-04-01), Levy et al.
Performance of MSK High-Speed Digital Transmission in Land Mobile Radio Channels, by Hata et al., IEEE Global Telecommunications Conference, Atlanta, Georgia, Nov. 26-29, 1984, Conference Record, vol. 1 of 3, pp. 518-523.
Mobile Communications Engineering, by William C. Y. Lee, pp. 248-257.

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