VDSL modem divided into a digital and an analog part
First Claim
1. A VDSL-modem comprising:
- an optical node for connection to at least one subscriber, and including an analog unit comprising an analog-to-digital (A/D) converter for converting analog signals received from the at least one subscriber to digital signals for transmission;
at least one local station, at a separate location from the optical node, and including a digital unit in communication with the analog unit for receiving the digital signals therefrom; and
an optical fiber connecting the analog unit and the digital unit.
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Accused Products
Abstract
A VDSL-modem which is divided into an analog part which is placed in an optical node and a digital part which is placed in a local station. The analog part of the VDSL-modem includes an A/D-converter and D/A-converter, a filter, an amplifier, a hybrid/balun, an adaptive noise attenuator, an optical interface, and possibly an echo canceller. The digital part of the modem includes an FFT/IFFT-processor, a synchronizer, an equalizer, an interleaving unit, an error correction unit, a protocol manager, and an optical interface. The VDSL-modem simplifies synchronization of the modem and reduces power consumption in the optical node. A multiplexor function in the optical node in addition is simpler because it need not manage a protocol.
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Citations
11 Claims
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1. A VDSL-modem comprising:
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an optical node for connection to at least one subscriber, and including an analog unit comprising an analog-to-digital (A/D) converter for converting analog signals received from the at least one subscriber to digital signals for transmission; at least one local station, at a separate location from the optical node, and including a digital unit in communication with the analog unit for receiving the digital signals therefrom; and an optical fiber connecting the analog unit and the digital unit. - View Dependent Claims (2, 3, 4, 5)
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6. A DSL-modem comprising:
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an optical node for connection to at least one subscriber, and including an analog unit comprising an analog-to-digital (A/D) converter for converting analog signals received from the at least one subscriber to digital signals for transmission; and at least one local station, at a separate location from the optical node, and including a digital unit in communication with the analog unit for receiving the digital signals therefrom. - View Dependent Claims (7, 8, 9, 10)
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11. A method of providing a Very High Data Rate Digital Subscriber Line (VDSL) to a subscriber comprising:
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connecting an optical node to the subscriber, the optical node including an analog unit comprising an analog-to-digital (A/D) converter for converting analog signals received from the subscriber to digital signals for transmission; providing a digital unit in at least one local station at a separate location from the optical node, the digital unit in communication with the analog unit for receiving the digital signals therefrom; and connecting the analog unit and the digital unit with an optical fiber.
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Specification