Method and apparatus for transmitting signals over wire connections

A transmitting device for transmitting data to one or more receiver devices, each of which is connected to the transmitter device via a respective wire connection, the transmitter device being operable to transmit signals onto the wire connections over one or more different channels, the transmitting device configured to, for each of the one or more different channels:

• determine a value of a first function, the first function being a function of a power mask for transmitting the data over the one or more different channels;
• determine a value of a second function, the second function being a function of an upper bound for a channel capacity of the one or more channels;
• determine a value of a third function, the third function being a function of the value of the first function and the value of the second function;
• using the determined value of the third function, determine a transmission power for transmitting data along that channel, wherein a transmission power, smj,j, is determined using:
• s
• j
• ,
• j
• m
• =
• 1
• (
• ln
• ⁢
• ⁢
• 2
• )
• ⁢
• λ
• 3
• j
• ,
• j
• m
• -
• 1
• γ
• j
• ,
• j
• m
• where:
• j is a channel index;
• λm3j,j is the third function;
• and
• γmj,j is the gain of the jth channel;
• and
• transmit data over that channel to one or more of the receiver devices, the data being transmitted at the transmission power determined for that channel.

A method of transmitting data from a transmitter device to one or more receiver devices, each of the one or more receiver devices being connected to the transmitter device via a respective wire connection, the transmitter device being operable to transmit signals onto the wire connections over one or more different channels, the method comprising, for each of the one or more different channels:

• determining a value of a first function, the first function being a function of a power mask for transmitting the data over the one or more different channels;
• determining a value of a second function, the second function being a function of an upper bound for a channel capacity of the one or more channels;
• determining a value of a third function, the third function being a function of the value of the first function and the value of the second function;
• using the determined value of the third function, determining a transmission power for transmitting data along that channel;
• and
• transmitting, by the transmitter device, data over that channel to one or more of the receiver devices, the data being transmitted at the transmission power determined for that channel;
• wherein, the first function is additionally a function of a gain of the one or more channels, the gain of a channel being a ratio of a power coupling coefficient to a noise level on that channel.

A method of transmitting data from a transmitter device to one or more receiver devices, each of the one or more receiver devices being connected to the transmitter device via a respective wire connection, the transmitter device being operable to transmit signals onto the wire connections over one or more different channels, the method comprising, for each of the one or more different channels:

• determining a value of a first function, the first function being a function of a power mask for transmitting the data over the one or more different channels;
• determining a value of a second function, the second function being a function of an upper bound for a channel capacity of the one or more channels;
• determining a value of a third function, the third function being a function of the value of the first function and the value of the second function;
• using the determined value of the third function, determining a transmission power for transmitting data along that channel;
• and
• transmitting, by the transmitter device, data over that channel to one or more of the receiver devices, the data being transmitted at the transmission power determined for that channel;
• wherein, the second function is additionally a function of a gain of the one or more channels, the gain of a channel being a ratio of a power coupling coefficient to a noise level on that channel.

A method of transmitting data from a transmitter device to one or more receiver devices, each of the one or more receiver devices being connected to the transmitter device via a respective wire connection, the transmitter device being operable to transmit signals onto the wire connections over one or more different channels, the method comprising, for each of the one or more different channels:

• determining a value of a first function, the first function being a function of a power mask for transmitting the data over the one or more different channels;
• determining a value of a second function, the second function being a function of an upper bound for a channel capacity of the one or more channels;
• determining a value of a third function, the third function being a function of the value of the first function and the value of the second function;
• using the determined value of the third function, determining a transmission power for transmitting data along that channel;
• and
• transmitting, by the transmitter device, data over that channel to one or more of the receiver devices, the data being transmitted at the transmission power determined for that channel;
• wherein the determining of the transmission power for transmitting data over a channel comprises determining the transmission power as a function of the value of the third function and a gain of the one or more channels, the gain of a channel being a ratio of a power coupling coefficient to a noise level on that channel.