Method and apparatus for data transmission
First Claim
Patent Images
1. A device comprising:
- a terminal to receive a first transmission signal;
a machine generating information related to crosstalk by comparing first information based on the received first transmission signal with second information based on predetermined information; and
a transmitter coupled to the terminal to transmit a second signal representing the second information.
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Abstract
A first device provides a first signal transmitted to a second device. The second device generates information related to precompensation based on the first signal.
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Citations
55 Claims
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1. A device comprising:
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a terminal to receive a first transmission signal; a machine generating information related to crosstalk by comparing first information based on the received first transmission signal with second information based on predetermined information; and a transmitter coupled to the terminal to transmit a second signal representing the second information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system comprising:
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a first device; a second device; a first transmission line coupling the first and second device; the first device comprising; a modulator to receive first information and to generate a plurality of transmission signals based on modulating the first information onto a plurality of carriers of the first transmission line; a first terminal to transmit the plurality of transmission signals over the first transmission line; a controller controlling the modulator to generate a first transmission signal of the plurality of transmission signals based on predetermined information; the second device comprising; a second terminal to receive the first transmission signal; a machine generating third information related to a crosstalk on the transmission line during the transmission of the first signal based on a comparing of second information related to the received first transmission signal with information based on the predetermined information; and a transmitter coupled to the terminal to transmit a second transmission signal representing the third information from the second device to the first device. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method comprising:
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receiving a first signal transmitted over an transmission line, the first signal being generated based on predetermined information; generating at least one first information based on the received first signal; generating second information related to crosstalk on the transmission line based on a comparing of the at least one first information with information based on the predetermined information; transmitting a second signal representing the second information related to crosstalk. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A method comprising receiving a plurality of signals transmitted over a transmission line;
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selecting a first signal from the plurality of signals by using a predetermined scheme; and providing information related to crosstalk during the transmission of the first signal based on the selected signal. - View Dependent Claims (25, 26, 27)
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28. A device comprising:
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a terminal to receive a plurality of signals transmitted over a transmission line; a selector selecting a first signal from the plurality of signals based on a predetermined scheme; and a machine providing information related to crosstalk during the transmission of the first signal based on the selected first signal. - View Dependent Claims (29)
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30. A system comprising:
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a first device; a second device; a third device; a first transmission line coupling the first and second device; a second transmission line coupling the first and third device; the first device comprising; a first transceiver to transmit a first plurality of signals on a first transmission line and to receive a second plurality of signals from the first transmission line; a second transceiver to transmit a third plurality of signals on a second transmission line and to receive a fourth plurality of signals from the second transmission line; a controller controlling the first transceiver to generate a first signal of the first plurality of signals based on first information and controlling the second transceiver to generate, time shifted with respect to the first signal, a second signal of the second plurality of signals based on second information; the second device comprising; a terminal to receive the first plurality of signals transmitted over the first transmission line; a selector identifying the first signal from the first plurality of received signals by using a predetermined scheme; and a machine providing third information related to crosstalk during the transmission of the first signal based on the identified signal; the third device comprising; a terminal to receive the third plurality of signals transmitted over the second transmission line; a selector identifying the second signal from the third plurality of received signals by using a predetermined scheme; and a machine providing third information related to crosstalk during the transmission of the second signal based on the identified signal. - View Dependent Claims (31)
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- 32. A scheduler controlling transmission of first synchronisation DMT-symbols transmitted by a first VDSL-transceiver and controlling transmission of second synchronisation DMT-symbols transmitted by a second VDSL-transceiver, the scheduler comprising a control circuit to time-shift transmission of the second synchronisation DMT-symbols relative to the transmission of the first synchronization DMT-symbols by a predetermined time interval.
- 35. A computer program, when executed on a computing system, controlling a first VDSL-transceiver and a second VDSL-transceiver to transmit first synchronisation DMT-symbols transmitted by the first VDSL-transceiver time-shifted to second synchronisation DMT-symbols transmitted by the second VDSL-transceiver.
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38. A method comprising:
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transmitting a first signal on a first transmission line from a first device to a second device and transmitting time-shifted with respect to the first signal a second signal on a second transmission line from the first device to a third device; generating first information related to cross-talk on the first transmission line based on the first signal, and generating second information related to cross-talk on the second transmission line based on the second signal; modifying a first value related to precompensation of cross-talk based on the first information; and modifying a second value related to precompensation of cross-talk based on the second information. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46)
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47. A xDSL-transmission system comprising:
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a first device; a second device; a transmission line coupling the first and second device; the first device comprising a modulator to receive a plurality of information and to generate a plurality of signals based on encoding the plurality of information to a plurality of carriers of a transmission line according to a bitloading map; a controller controlling the modulator to generate a first signal independent of the bitloading map by using only QPSK modulation or BPSK modulation; the second device comprising; a terminal to receive the plurality of signals transmitted over the transmission line; a selector to identify the first signal from the plurality of received signals; a machine to generate, based on the first signal, information related to crosstalk on the transmission line during the transmission of the first signal; a transmitter to transmit the information related to crosstalk over the transmission line to the first device. - View Dependent Claims (48, 49, 50, 51)
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52. A method comprising:
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generating a first signal by coding data using QPSK modulation or BPSK modulation. transmitting the first signal over a transmission line from a first device to a second device; generating information related to crosstalk on the transmission line based on the first signal; and modifying a value related to precompensation of crosstalk based on the information.
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- 53. The method according to claim 53, wherein generating the first signal and transmitting the first signal is permanently repeated and wherein between each of the repeated first signals at least one signal representing user data is transmitted over the transmission line.
Specification