Patent
1975-10-17
1977-04-26
Claffy, Kathleen H.
H04J 108
Patent
active
040202887
ABSTRACT:
Parallel data transmission system in which the data signals are converted to multilevel digital signals and transmitted through the channels of a frequency division multiplex system. To compensate for the delays between the data signals received in the various channels of the multiplex, a pilot signal is transmitted in each channel in the form of a signal which only has a real component. At the receiver side a filter circuit is used which comprises a first fixed coefficient part at whose input the data signal is multiplied by a component of the received pilot signal and a second part having two variable coefficients which are derived from the two components of the received pilot signal.
REFERENCES:
patent: 3733438 (1973-05-01), Haley
patent: 3872257 (1975-03-01), Bleickardt
patent: 3912870 (1975-10-01), Roy
Bellanger Maurice Georges
Daguet Jacques Lucien
Claffy Kathleen H.
Cohen Simon L.
Popek Joseph A.
Telecommunications Radioelectriques et Telephoniques T.R.T.
Trifari Frank R.
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