System and method for modifying symbol duration for the efficient transmission of information in a time duplex noise environment
First Claim
1. A system for modifying symbol duration in a time duplex noise environment, wherein a total number of Discrete MultiTone (DMT) symbols are transmitted within a Time compressed Multiplex Integrated Service Digital Network timing reference (TTR) period, comprising:
- a first transceiver; and
a second transceiver, wherein said first transceiver transmits a first half of said total number of DMT symbols to said second transceiver while said first transceiver receives far end crosstalk noise, and said first transceiver transmits a second half of said total number of DMT symbols to said second transceiver while said first transceiver receives near end crosstalk noise.
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Abstract
A system and method for modifying symbol duration for the efficient transmission of information in a time duplex noise environment is disclosed. In a simplified embodiment, the system modifies the length of Discrete MultiTone (DMT) symbols, thereby providing a system wherein a first half of the DMT symbols are transmitted entirely during a period in which there is far end crosstalk (FEXT) noise, and a second half of the DMT symbols are transmitted entirely during a period in which there is near end crosstalk (NEXT) noise. Preferably, the duration of each DMT symbol is selected to be 0.25 ms such that exactly ten DMT symbols fall within a time duplex period of 2.5 ms. As such, during a FEXT period, exactly five DMT symbols are transmitted, and during a NEXT period, exactly five DMT symbols are transmitted. Therefore, in each TTR period, an additional DMT symbol, with modified length, is transmitted during the FEXT period, during which information is transmitted at a high bit rate.
83 Citations
20 Claims
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1. A system for modifying symbol duration in a time duplex noise environment, wherein a total number of Discrete MultiTone (DMT) symbols are transmitted within a Time compressed Multiplex Integrated Service Digital Network timing reference (TTR) period, comprising:
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a first transceiver; and
a second transceiver, wherein said first transceiver transmits a first half of said total number of DMT symbols to said second transceiver while said first transceiver receives far end crosstalk noise, and said first transceiver transmits a second half of said total number of DMT symbols to said second transceiver while said first transceiver receives near end crosstalk noise. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of modifying symbol duration in a time duplex noise environment so as to transmit a total number of Discrete MultiTone (DMT) symbols within a Time Compressed Multiplex Integrated Service Digital Network timing reference (TTR) period, comprising the steps of:
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transmitting a first half of said total number of DMT symbols during a far end crosstalk period; and
transmitting a second half of said total number of DMT symbols during a near end crosstalk period. - View Dependent Claims (15, 16, 17)
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18. A system for modifying symbol duration in a time duplex noise environment, wherein a total number of Discrete MultiTone (DMT) symbols are transmitted within a Time Compressed Multiplex Integrated Service Digital Network timing reference (TTR) period, comprising:
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a first transceiving means; and
a second transceiving means, wherein said first transceiving means transmits a first half of said total number of DMT symbols to said second transceiving means while said first transceiving means receives far end crosstalk noise, and said first transceiving means transmits a second half of said total number of DMT symbols to said second transceiving means while said first transceiving means receives near end crosstalk noise. - View Dependent Claims (19, 20)
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Specification