Multilevel data transmission system

Details Multilevel data transmission system Multilevel data transmission system

1974-09-25

1976-03-30

Libman, George H.

Telegraphy

Systems

Printing

178 68, H04B 162

Patent

active

039477673

ABSTRACT:
An improved multilevel code transmission system for transmission of a data signal in the form of an N-level code signal based on a partial response shaping employs a special differential coding prior to partial response shaping on the transmitter side and, on the receiver side subsequent to partial response decoding, a differential decoding corresponding to the differential coding. The system is characterized in that each pair of input, parallel binary codes is so arranged that only the most significant bit is different from each other and the remaining bits are represented by the same binary codes, and in that only the most significant bit is affected by the differential coding and decoding.

REFERENCES:
patent: 3829779 (1974-08-01), Fujimoto

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