Broadband network for coaxial cable using multi-carrier modulation
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United States of America Patent
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Apr 2, 2013
Grant Date -
Aug 11, 2011
app pub date -
Apr 20, 2011
filing date -
Aug 30, 2001
priority date (Note) -
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Abstract
A broadband local area data network uses coaxial cable wiring for interconnection of terminal devices. Orthogonal frequency division multiplexing (OFDM) with bit loading is used to overcome channel impairments and provide a path for terminal devices to transmit to and receive from other terminal devices. Probe messages are sent between devices to characterize the communication channel and determine optimum bit loading. The data network shares the cable spectrum with other services and uses frequency bands not used by other services. Adaptive power control can be used to maintain signal to noise ratio in a communication between terminal devices. Frequency coordination can be used to avoid interference between the LAN communications and other services transmitted on the cable.
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