Apparatus and method of transmitting data over a coaxial cable in a noisy environment
First Claim
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1. A method of transmitting data over a cable in a noisy environment having interfering frequencies, the method comprising the steps of:
- receiving a serial data bit stream;
converting said serial data bit stream into a parallel data bit stream comprising n-bits;
generating n-carrier frequencies, each corresponding to one of said n-bits of said parallel data bit stream, wherein said n-carrier frequencies are selected such that they are located between the interfering frequencies;
modulating each of said n-bits onto said corresponding n-carrier frequency to produce n-modulated data signals; and
combining said n-modulated data signals for transmission over the cable.
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Abstract
An apparatus and method of transmitting digital data over a coaxial cable a noisy environment using several carriers with narrower bandwidths in place of the single carrier with a wide bandwidth. In a frequency spectrum, these several carriers are located between interfering harmonic and spurious noise frequencies generated by the other signals, an particularly clock signals. These narrow signals are then combined for transmission over a cable, substantially reducing noise in the signal recovered at the receiving end.
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Citations
9 Claims
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1. A method of transmitting data over a cable in a noisy environment having interfering frequencies, the method comprising the steps of:
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receiving a serial data bit stream; converting said serial data bit stream into a parallel data bit stream comprising n-bits; generating n-carrier frequencies, each corresponding to one of said n-bits of said parallel data bit stream, wherein said n-carrier frequencies are selected such that they are located between the interfering frequencies; modulating each of said n-bits onto said corresponding n-carrier frequency to produce n-modulated data signals; and combining said n-modulated data signals for transmission over the cable. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for transmitting data over a cable in a noisy environment having interfering frequencies, comprising:
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means for converting a serial data bit stream into a parallel data bit stream comprising n-bits; means for generating n-carrier frequencies, each corresponding to one of said n-bits of said parallel data bit stream and being selected such that they are located between the interfering frequencies; means for modulating each of said n-bits of said parallel data bit stream onto said corresponding one of said carrier frequencies to produce n-modulated data signals; and means for combining said n-modulated data signals for transmission over the cable. - View Dependent Claims (7, 8, 9)
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Specification