Abstract: A power line communication method for realizing data communication between at least one first or sending power line communication partner device and at least one second or receiving power line communication partner device. The method checks transmission conditions of a plurality of possible communication channels, thereby generating transmission condition data descriptive for the communication conditions of the respective possible communication channels. Additionally, communication conditions of the plurality of possible communication channels are selected as actual communication conditions based on the transmission condition data.

Abstract: A method for transmitting a signal from a transmitter over a channel to a receiver on a Power Line Network, wherein said signal is OFDM-modulated on a set of sub-carriers, is proposed, wherein an OFDM tonemap and an eigenbeamforming encoding matrix are determined based on a channel estimation for each sub-carrier, a tonemap feedback signal and an eigenbeamforming feedback signal are generated, which are descriptive of said OFDM tonemap and said eigenbeamforming encoding matrix, respectively, and transmitted to the transmitter. A corresponding receiver, a transmitter, a power line communication and a power line communication system are described as well.

Abstract: A power line communication method for realizing data communication between at least one first or sending power line communication partner device and at least one second or receiving power line communication partner device. The method checks transmission conditions of a plurality of possible communication channels, thereby generating transmission condition data descriptive for the communication conditions of the respective possible communication channels. Additionally, communication conditions of the plurality of possible communication channels are selected as actual communication conditions based on the transmission condition data.

Abstract: A system for transmitting data via a power line including: a first communications device and a second communications device, the first communications device including a transmit unit adapted to generate OFDM symbols to be transmitted using sub-carriers; a roll-off interval indication unit adapted to generate a transmit message indicating that no roll-off interval before and/or after the OFDM symbols is used when transmitting the data; the transmit unit being further adapted to transmit the transmit message; the second communications device including a receive unit adapted to generate the data from the transmitted OFDM symbols by taking into account the received transmit message.

Abstract: A device for determining a common-mode signal in a power line communication network. The device includes a first line, a second line, and a third line that are connected to a first terminal, to a second terminal, and to a third terminal, respectively. The first, the second, and the third terminal are configured to be connected to a phase line, a neutral line, and a protective ground line of the power line communication network, respectively. The device further includes a common-mode choke configured to couple out the common signal from the first, second, and third line, and the common-mode choke is connected to a termination impedance which is higher than an impedance of the power line communication network.

Abstract: A method for receiving signals over a power line network, within the power line network at least one transmitter and at least one receiver communicate via at least two channels, each of the channels having a respective feeding port of the at least one transmitter and a respective receiving port of the at least one receiver, and the receiver having at least two receiving ports. The method determines a channel characteristic of each of the channels, applies a receiving port selection criterion based on the channel characteristic, and selects an excluded receiving port among the at least two receiving ports based on the receiving port selection criterion, the excluded receiving port is not used during further communication.

Abstract: A device for bit-demultiplexing in a multicarrier MIMO communication system (e.g. precoded spatial multiplexing MIMO communication systems using adaptive OFDM), including a multicarrier MIMO transmitter and a multicarrier MIMO receiver. The multicarrier MIMO transmitter includes a demultiplexer and symbol mapper unit receiving an input bit stream and generating a plurality of symbol streams, each symbol stream being associated with a different transmission channel and including a plurality of data symbols, each data symbol being attributed to a different carrier; one or more multicarrier modulators generating at least two multicarrier modulated signals based on the symbol streams; and at least two transmit ports respectively transmitting the at least two multicarrier modulated signals, wherein a data throughput rate of each transmission channel is separately variable.

Abstract: A method for transmitting a signal over a power line channel and a corresponding power line communication modem, wherein the signal is OFDM-modulated on a set of sub-carriers, the sub-carriers being separated by a frequency separation. The method includes receiving a noise signal via the power line channel, determining respective signal values of the received noise signal within a plurality of fine frequency bands with a first resolution bandwidth, wherein the first resolution bandwidth is smaller than the frequency separation, determining a first disturbed frequency band of the plurality of fine frequency bands based on the respective signal values, and notching the signal in the first disturbed frequency band before transmitting the signal.

Abstract: A power line communication modem is provided including a transmitter configured to transmit a power line signal on at least one carrier of a plurality of carriers via a power line to a further power line communication modem; and a processor configured to allocate transmit powers to individual carriers of the plurality of carriers, wherein the sum of the transmit powers of individual carriers located in the first frequency range is below or equal to a first predetermined power maximum value for the first frequency range. A corresponding power line communication system and a power line communication method are provided as well.

Abstract: A method for transmitting a signal from a transmitter over a channel to a receiver on a Power Line Network, wherein said signal is OFDM-modulated on a set of sub-carriers, is proposed, wherein an OFDM tonemap and an eigenbeamforming encoding matrix are determined based on a channel estimation for each sub-carrier, a tonemap feedback signal and an eigenbeamforming feedback signal are generated, which are descriptive of said OFDM tonemap and said eigenbeamforming encoding matrix, respectively, and transmitted to the transmitter. A corresponding receiver, a transmitter, a power line communication and a power line communication system are described as well.

Abstract: A method for transmitting a signal from a transmitter over a channel to a receiver on a Power Line Network, wherein said signal is OFDM-modulated on a set of sub-carriers, is proposed, wherein an OFDM tonemap and an eigenbeamforming encoding matrix are determined based on a channel estimation for each sub-carrier, a tonemap feedback signal and an eigenbeamforming feedback signal are generated, which are descriptive of said OFDM tonemap and said eigenbeamforming encoding matrix, respectively, and transmitted to the transmitter. A corresponding receiver, a transmitter, a power line communication and a power line communication system are described as well.

Abstract: In a MIMO communications system a first communications device applies beamforming to a complete transmission packet including both synchronization data and either payload data or training symbols. A second communications device evaluates the beamformed synchronization data and determines and transmits a feedback information indicating minimum required synchronization data and/or a minimum number of training symbols. The first communications device tailors the synchronization data and/or number of training symbols on the basis of the feedback information. Beamforming the complete transmission packet facilitates signal suppression at defined locations. When the channel properties change, the second communications device may provide further channel state information to adapt beamforming in the first communications device without transmission of not beamformed training symbols. The communications system may be a powerline telecommunications system.

Abstract: A power line communication modem includes a receiver that receives a noise signal over a power line channel. The signal is OFDM-modulated on a set of sub-carriers, the sub-carriers being separated by a frequency separation. The power line communication modem also includes a processor that identifies a presence of a radio service within one or more fine frequency bands with a first resolution bandwidth by analyzing a plurality of fine frequency bands. The first resolution bandwidth is smaller than the frequency separation. The power line communication modem additionally includes a transmitter that excludes a signal in at least one of the plurality of fine frequency bands, in which the presence of the radio service has been identified, before transmitting the excluded signal.

Abstract: A transmitting device, a receiving device, and a communication method for transmitting and receiving data modulated on frequency subcarriers of an OFDM communication system. An OFDM burst includes a preamble part and payload data part, whereby the preamble includes a section of pilot symbols mapped onto every n-th frequency subcarrier and signaling data mapped onto the frequency subcarriers between the frequency subcarriers with the pilot symbols. A first channel estimation on the basis of the received pilot symbols is performed, the result of which is used to reconstruct the entire section of the received preamble as a training pattern for an accurate channel estimation, which is used for a channel equalization of the received payload part.

Abstract: A method for transmitting a signal from a transmitter over a channel to a receiver on a Power Line Network, wherein said signal is OFDM-modulated on a set of sub-carriers, is proposed, wherein an OFDM tonemap and an eigenbeamforming encoding matrix are determined based on a channel estimation for each sub-carrier, a tonemap feedback signal and an eigenbeamforming feedback signal are generated, which are descriptive of said OFDM tonemap and said eigenbeamforming encoding matrix, respectively, and transmitted to the transmitter. A corresponding receiver, a transmitter, a power line communication and a power line communication system are described as well.

Abstract: A testing device including: a first terminal configured to be connected to an equipment under test; a common-mode detector configured to detect a common-mode part of a signal emitted from the equipment under test; and a first impedance unit connected in series between the first terminal and the common-mode detector. The first impedance unit is configured to adjust a longitudinal conversion loss of the testing device to a predetermined value. A corresponding method determines a common mode signal of an electrical telecommunication.

Abstract: A system for transmitting data via a power line including: a first communications device and a second communications device, the first communications device including a transmit unit adapted to generate OFDM symbols to be transmitted using sub-carriers; a roll-off interval indication unit adapted to generate a transmit message indicating that no roll-off interval before and/or after the OFDM symbols is used when transmitting the data; the transmit unit being further adapted to transmit the transmit message; the second communications device including a receive unit adapted to generate the data from the transmitted OFDM symbols by taking into account the received transmit message.

Abstract: A method for transmitting a signal from a transmitter over a channel to a receiver on a Power Line Network, wherein said signal is OFDM-modulated on a set of sub-carriers, is proposed, wherein an OFDM tonemap and an eigenbeamforming encoding matrix are determined based on a channel estimation for each sub-carrier, a tonemap feedback signal and an eigenbeamforming feedback signal are generated, which are descriptive of said OFDM tonemap and said eigenbeamforming encoding matrix, respectively, and transmitted to the transmitter. A corresponding receiver, a transmitter, a power line communication and a power line communication system are described as well.

Abstract: In a MIMO communications system a communication device receives one or more receive signals on at least one receiver port. A receiver unit recovers, from the at least one receive signal, at least a first transmit signal transmitted to the receiving communication device via a transmission channel. A multi-link decoder unit decodes the receive signals using a multi-link decoder algorithm with parameters derived from a first channel state information describing the transmission channel and second channel state information describing at least one interference channel via which one or more second transmit signals arrive at the communication device.

Abstract: A power line communication method for realizing data communication between at least one first or sending power line communication partner device and at least one second or receiving power line communication partner device. The method checks transmission conditions of a plurality of possible communication channels, thereby generating transmission condition data descriptive for the communication conditions of the respective possible communication channels. Additionally, communication conditions of the plurality of possible communication channels are selected as actual communication conditions based on the transmission condition data.