Demodulation apparatus

Details Demodulation apparatus Demodulation apparatus

1989-12-04

1991-01-08

Shoop, Jr., William M.

Coded data generation or conversion

Digital code to digital code converters

To or from nrz codes

341100, H03M 514, H03M 900

Patent

active

049839659

ABSTRACT:
An original digital signal is converted into either a Miller-squared code signal or a Miller code signal, and undergoes serial-to-parallel conversion to produce n-phase signals (where n is desired to be a positive even number). N-phase virtual demodulated signals are simultaneously generated at clock timing having a period equivalent to 1
times the period of the transmission clock. Out of the n-phase virtual demodulated signals, n/2 phases are selected to undergo parallel-to-serial conversion, the original digital signal being thus obtained.

REFERENCES:
patent: 4027335 (1977-05-01), Miller
patent: 4456884 (1984-06-01), Yarborough, Jr.
patent: 4533958 (1985-08-01), Herget
patent: 4620311 (1986-10-01), Schouhamer
patent: 4675652 (1987-06-01), Machado
Wood, Roger, "Viterbi Reception of Miller-Squared Code on a Tape Channel", Video and Data Recording Report, IRE, 1982, pp. 1-11.
Periodical of the Institute of Television Engineers of Japan, vol. 35, No. 7, 1981, pp. 546-548.

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