Pulse or digital communications – Repeaters – Testing
Patent
1982-04-13
1984-08-07
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
371 56, 375 36, H04L 2534
Patent
active
044647654
ABSTRACT:
In a multi-level transmission system, a binary digital signal is converted into a multi-level signal by generating successive multi-level symbols each having a polarity opposite the polarity of the average DC level of preceding symbols, with the first symbol having a first polarity when the first binary bit is a logical "0" and having a second polarity when the first bit is a logical "1". If desired, the logical values of all bits after the first bit can be complemented prior to generating the appropriate multi-level symbols.
REFERENCES:
patent: 2700696 (1955-01-01), Barker
patent: 3571794 (1971-03-01), Tong
patent: 3695294 (1976-06-01), Renz et al.
patent: 3783383 (1974-01-01), Forster
patent: 4003041 (1977-01-01), Duuren et al.
IEEE Transactions on Communications, vol. COM-29, No. 11, Nov. 1981, pp. 1565.1572.
IEEE Transactions on Communications, vol. COM-27, No. 7, Jul. 1979, pp. 1096-1103.
Nippon Electric Co. Ltd.
Safourek Benedict V.
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