Pulse or digital communications – Systems using alternating or pulsating current
Reexamination Certificate
2011-07-26
2011-07-26
Corrielus, Jean B (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Reexamination Certificate
active
07986735
ABSTRACT:
A digital signal transmission apparatus that transmits a digital signal to another apparatus via a coaxial cable connected therebetween includes a signal divider configured to divide a digital signal to be transmitted into a plurality of signal groups; a plurality of modulators configured to modulate each of the plurality of signal groups obtained by the signal divider by using an orthogonal frequency division multiplexing method; a plurality of frequency shifters configured to shift each of the frequency bands of a plurality of modulation signals generated by the plurality of modulators from a baseband to a mutually different frequency band; and a signal sender configured to combine a plurality of modulation signals whose frequency bands are shifted by the plurality of frequency shifters and to transmit the signals to the coaxial cable.
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Ishikawa Nobuyuki
Morioka Yoshihiro
Murayama Hideaki
Corrielus Jean B
Emas Ellen Marcie
Frommer William S.
Frommer & Lawrence & Haug LLP
Sony Corporation
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