Differential coding system and apparatus therefor

Details Differential coding system and apparatus therefor Differential coding system and apparatus therefor

1984-06-26

1987-04-28

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

375 27, H04J 1100, H04B 1406

Patent

active

046619453

ABSTRACT:
A differential coding system applicable to a staggered quadrature amplitude modulation transmission system is disclosed. Even when ambiguities with respect to phase and time have developed in combination in the transmission system, the differential coding system performs differential coding with ease and, thereby, faithfully regenerates an original data code sequence.

REFERENCES:
patent: 3710257 (1973-01-01), Low et al.
patent: 3732375 (1973-05-01), Kuribayashi
patent: 4520490 (1985-05-01), Wei
IEEE Transactions on Communications, vol. COM 23, No. 2, Mar. 1975; "The Performance of Staggered Quadrature Amplituoe Modulation in the Presence of Phase Jitter", Gitlin et al.

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