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AssigneeInfineon Technologies AG
InventorsTorbjorn Randahl, Albin Johansson, Anders Soderbarg, Tore Andre, Allan Olson
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To minimize power dissipation in a line driver (3) in a central office (CO) for driving a DSL connection to a network terminal (NT) with a predetermined maximum constellation size, the central office (CO) supplies the line driver (3) with a predetermined supply voltage during a training sequence, and transfers data with a predetermined power spectral density in all available channels. The network terminal (NT) measures the signal-to-noise ratio of each channel, and transfers information to the central office (CO) about channels having signal-to-noise ratios that enable transfer of data. The central office (CO) reduces the power spectral density to a lowest possible value that still enables transfer of data in all channels having signal-to-noise ratios above a predetermined threshold as set by the maximum constellation size, calculates a sum of power to be transmitted in said channels, converts said sum into a corresponding line driver output voltage, and reduces the line driver supply voltage in correspondence thereto.
A method of minimizing power dissipation in a line driver in a central office for driving a DSL connection of unknown length to a network terminal with a predetermined maximum constellation size, characterized by the following steps during a training sequence initiated by the central office to set up the connection:
An arrangement for minimizing power dissipation in a line driver (3) in a central office (CO) for driving a DSL connection of unknown length to a network terminal (NT) with a predetermined maximum constellation size, characterized in
Dependencies are inferred from the claim text.