Abstract: A method limits the effect of repetitive electrical impulse noise in a communication system. The presence of the repetitive electrical impulse noise is detected during communication service. If the repetitive electrical impulse noise is detected, then a message is transmitted which signals that the repetitive electrical impulse noise is present. Other systems and methods are disclosed.

Abstract: The invention relates to a method for reducing the crest factor of a data symbol to be transmitted in a multi-carrier data transmission system, in which the data symbol to be transmitted is a function of a multiplicity of signals provided within a predetermined data frame and each of these signals is allocated to a carrier, each carrier occupying in each case at least one frequency from a transmit data spectrum, at least one carrier being reserved which is not provided for the data transmission and the predetermined data frame exhibiting the data symbol and a prefix which is derived from a part of the data symbol, in which peak values within the prefix are also taken into consideration for reducing the crest factor.

Abstract: In a communication device, a multi-carrier signal with at least one group of signal carriers is received from a communication connection. For each of the signal carriers, at least one individual error value is evaluated or generated. From the individual error values, a combined error value is evaluated or generated. The combined error value is transmitted on a backchannel of the communication connection.

Abstract: An apparatus includes a transmitter configured to transmit data via a plurality of communication channels of a communication connection. The transmitter is further configured to transmit a same sequence for vector training on each of the communication channels. The sequences for at least two of the communication channels are shifted with respect to each other.

Abstract: An arrangement for use in a telecommunication system includes a binder of subscriber lines, a local transceiver circuit, and a far-end crosstalk cancellation circuit. Each of the subscriber lines ends at one of a plurality of remote user terminals. The local transceiver circuit is associated with the binder of subscriber lines and comprises a plurality of substantially identical transceiver modules, each of the transceiver modules being associated to one or a small number of subscriber lines. The far-end crosstalk cancellation circuit is configured to reduce far-end crosstalk between the subscriber lines of the binder, and is operably connected to interface with at least parts of the received data of the respective local transceiver modules. The far-end crosstalk cancellation circuit operable to implement a blind training algorithm for at least one victim subscriber line based on signals received by the respective associated transceiver modules.

Abstract: One embodiment relates to a method for transitioning from an initial data rate utilizing an initial transmission variable to a new data rate in a multi-carrier communication system. In the method, a first function or a second function is selected to calculate a modified transmission variable, wherein the first function or second function is selected as a function of relative priorities of first and second communication parameters. The new data rate is implemented by modification of transmission variable. Other methods and systems are also disclosed.

Abstract: A method and an apparatus for the transmission of data is provided, wherein the data, in a first operating mode, are transmitted in a plurality of first frequency bands and, in a second operating mode, are transmitted in a plurality of second frequency bands. A number of the first frequency bands is in this case greater than a number of the second frequency bands. The first operating mode is used if there is a large quantity of data to be transmitted. If only a small quantity of data is to be transmitted, switchover to the second operating mode is effected, whereby a power saving can be achieved, particularly in digital parts of a transmitting device and of a receiving device.

Abstract: Allocation of different signal-to-noise margins to different carriers in a multi-carrier system is described. A preferred embodiment comprises assigning signal-to-noise ratio (SNR) margins to carriers in a multi-carrier system, comprises assigning a first SNR margin to a first data service based upon a first service characteristic, assigning a second SNR margin to a second data service based upon a second service characteristic, transmitting data associated with the first data service using the first signal-to-noise margin, and transmitting data associated with the second data service using the second signal-to-noise margin.

Abstract: According to the invention, a circuit for reducing the crest factor is provided: (A) with a transmit path with a data symbol to be transmitted; (B) with a model path, which is arranged in parallel with a section of the transmit path, which exhibits a model filter to which the non-oversampled data symbol to be transmitted can be supplied, the non-oversampled data symbol exhibiting a non-flat PSD power spectrum, which exhibits an analysis and evaluation circuit which is arranged following the model filter and which checks whether the time domain function of the data symbol to be transmitted exhibits within a predetermined time interval at least one maximum, the amount of which exceeds a first threshold and/or determines the associated position of the maximum within the time interval, and which, by scaling and displacing a dirac-like sample function generates a correction function in dependence on the position and the amplitude of the maximum; (C) with a subtracting device which is connected to outputs of

Abstract: The invention relates to a method for reducing the crest factor, comprising the following method steps: (a) IFFT transformation of a data symbol to be transmitted; (b) looking for all peak values within a frame of the IFFT-transformed data symbol the amount of which is above a predetermined threshold; (c) providing a sample correction function; (d) allocating a scaling and phase rotation to the sample correction function according to the amplitude and position of the peak values found; (e) generating a correction signal in the frequency domain from a linear combination of rotated and scaled vectors according to the scaling and position determined; (f) modifying, particularly reducing the peak value of the data symbol to be transmitted by subtracting the correction signal, and IFFT transformation of the peak-value-modified data symbol into the time domain. The invention also relates to a circuit for reducing the crest factor.

Abstract: According to an embodiment, a DSL transceiver is set in a low power mode and moved out of the low power mode responsive to the DSL transceiver receiving data. Data is transmitted only on a first group of sub-carriers when moving the DSL transceiver out of the low power mode, the first group of sub-carriers being a subset of the sub-carriers available to the DSL transceiver for transmission.

Abstract: According to an embodiment, a DSL transceiver includes a power mode controller and a transmitter. The power mode controller is configured to set the DSL transceiver in a low power mode and move the DSL transceiver out of the low power mode responsive to the DSL transceiver receiving data. The transmitter is configured to transmit data only on a first group of sub-carriers when the power mode controller is moving the DSL transceiver out of the low power mode, the first group of sub-carriers being a subset of the sub-carriers available to the DSL transceiver for transmission.

Abstract: Allocation of different signal-to-noise margins to different carriers in a multi-carrier system is described. A preferred embodiment comprises assigning signal-to-noise ratio (SNR) margins to carriers in a multi-carrier system, comprises assigning a first SNR margin to a first data service based upon a first service characteristic, assigning a second SNR margin to a second data service based upon a second service characteristic, transmitting data associated with the first data service using the first signal-to-noise margin, and transmitting data associated with the second data service using the second signal-to-noise margin.

Abstract: In an embodiment, a communication device is provided comprising transmit circuitry and crosstalk reduction circuitry. In an embodiment, the crosstalk reduction circuitry is configured to receive crosstalk information indicative of crosstalk between a plurality of communication connections for only a part of communication channels of said communication connections.

Abstract: One embodiment of the present invention relates to a method of limiting data loss in a point-to-multipoint communication system. Data is transferred on a communication channel among network nodes of the point-to-multipoint communication system according to an initial frequency band plan. If a characteristic of the communication channel changes, then data is transferred among the network nodes according to a modified frequency band plan that differs from the initial frequency band plan.

Abstract: Methods for adding a communication connection to a vectored group of communication connections and corresponding apparatuses are disclosed.

Abstract: Methods for adding a communication connection to a vectored group of communication connections and corresponding apparatuses are disclosed.

Abstract: One embodiment of the present invention relates to a transceiver. The transceiver includes a transmitter having a first transmission path configured to transmit a digital baseband signal over a wireline medium. In addition, the transmitter has a second transmission path configured to transmit a radio frequency signal over a wireless medium. Other systems and methods are also disclosed.

Abstract: Allocation of different signal-to-noise margins to different carriers in a multi-carrier system is described. A preferred embodiment comprises assigning signal-to-noise ratio (SNR) margins to carriers in a multi-carrier system, comprises assigning a first SNR margin to a first data service based upon a first service characteristic, assigning a second SNR margin to a second data service based upon a second service characteristic, transmitting data associated with the first data service using the first signal-to-noise margin, and transmitting data associated with the second data service using the second signal-to-noise margin.

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.