Digital signal transmission apparatus and method, digital signal receiving apparatus and method, and digital signal transmission system
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United States of America Patent
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Jul 26, 2011
Grant Date -
Jul 24, 2008
app pub date -
Apr 23, 2007
filing date -
Apr 25, 2006
priority date (Note) -
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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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