A method of transmitting, using a discrete multi-tone technique, data between a first and a second transceiver over a plurality of metallic pairs connected between the first and second transceivers, providing a plurality of transmission channels, is disclosed.

A transmission system of at least one electrical signal to be transmitted by a transmitting electronic device to at least a receiving electronic device, comprising: at least one signal line which connects the transmitting electronic device to the at least one receiving electronic device and which is suitable to transmit the respective electrical signal to be transmitted; a signal generation unit, that generates the electrical signal to be transmitted on each signal line; at least one noise compensation line; a noise compensation circuit that generates on each noise compensation line a noise compensation signal.

A method for transmitting control systems over twisted pair cabling. The method includes: receiving a first single-ended transmission signal; converting the first single-ended transmission signal to a first differential transmission signal; transmitting the first differential transmission signal over a first two pairs of wires via a common mode of a transformer; receiving a first differential reception signal over a second two pairs of wires via the common mode of the transformer; and converting the first differential reception signal to a first single-ended reception signal.

Techniques are provided for fallback authorization routing. A merchant processor may receive authorization requests from one or more merchant systems. These authorization requests may be to authorize a transaction. The merchant processor may transmit these authorization requests over a first communication channel to an acquirer processor, which may then forward the requests to a payment network. If the merchant processor determines that the acquirer processor is not receiving the authorization requests, or is otherwise unavailable, the merchant processor may, as a fallback, transmit the authorization requests directly to the payment network through a second communication channel, thereby bypassing the acquirer processor. When the merchant processor receives some indication that the acquirer processor is available to process authorization requests, new authorization requests can be transmitted to the acquirer processor via the first communication channel.

A method for transmitting three data signals from a USB signal in which the first data signal is transmitted differentially via a first conductor pair and the second data signal is transmitted differentially via a second conductor pair. A signal portion of the third data signal is transmitted as a common mode component via the first conductor pair and a reference portion of the third data signal is transmitted as a common mode component via the second conductor pair. A USB transmission system for carrying out this method and an adapter for a USB transmission system are presented.

A method for transmitting three data signals from a USB signal in which the first data signal is transmitted differentially via a first conductor pair and the second data signal is transmitted differentially via a second conductor pair. A signal portion of the third data signal is transmitted as a common mode component via the first conductor pair and a reference portion of the third data signal is transmitted as a common mode component via the second conductor pair. A USB transmission system for carrying out this method and an adapter for a USB transmission system are presented.

Methods, systems, and devices for wireless communication are described. The method may include an energy harvesting (EH) device receiving a first control signal that includes scheduling information for the EH device. The scheduling information may indicate a first set of resources for communicating a first signal and a first offset between receiving the first control signal and communicating the first signal. Further, the method may include transmitting, via a second set of resources, a second signal indicating a second offset between receiving the first control signal and communicating the first signal and communicating the first signal via the first set of resources based on the second offset.

Methods, systems, and devices for wireless communication are described. The method may include an energy harvesting (EH) device receiving a first control signal that includes scheduling information for the EH device. The scheduling information may indicate a first set of resources for communicating a first signal and a first offset between receiving the first control signal and communicating the first signal. Further, the method may include transmitting, via a second set of resources, a second signal indicating a second offset between receiving the first control signal and communicating the first signal and communicating the first signal via the first set of resources based on the second offset.

Apparatus for communicating data between a transmitter device 16 and a first 51 and a second 52 receiver device, the receiver devices being connected, in use, to the transmitter device via a first 21 and a second 22 pair of wires respectively. Each receiver device is operable to receive signals detected as a change over time in the potential difference across the local ends of each respective pair of wires extending between the respective receiver device and the transmitter device, and the transmitter device is operable to transmit signals onto the wires at the transmitter ends thereof in order to transmit signals via a direct differential mode to each respective receiver via its respective pair of wires. The transmitter device is additionally operable to transmit signals to both receivers via a single common indirect channel and comprises: a channel estimator 1670, 1680, 1690 for estimating the extent of coupling between the common indirect channel and each of the receiver devices based on readings received by the transmitter device from the receiver devices; and a processor 1690 for determining a plurality of weighting values in dependence upon the estimated extents of the couplings; the transmitter 16 being operable to transmit a first signal via the direct differential mode over the first pair 21, to transmit a second signal via the direct differential mode over the second pair 22 and to transmit a combined signal onto the indirect channel, wherein the combined signal comprises a weighted sum of the first and second signals, the weighting being done in accordance with the determined weighting values; and wherein the transmitter further comprises a precoder 1640 for precoding the first, second and combined signals to pre-compensate them for the expected effects of cross-talk from the other ones of these signals, wherein the pre-coding of each signal, including the first and the second signals, is performed in dependence upon the determined weighting values.

Apparatus for communicating data between a transmitter device 16 and a first 51 and a second 52 receiver device, the receiver devices being connected, in use, to the transmitter device via a first 21 and a second 22 pair of wires respectively. Each receiver device is operable to receive signals detected as a change over time in the potential difference across the local ends of each respective pair of wires extending between the respective receiver device and the transmitter device, and the transmitter device is operable to transmit signals onto the wires at the transmitter ends thereof in order to transmit signals via a direct differential mode to each respective receiver via its respective pair of wires. The transmitter device is additionally operable to transmit signals to both receivers via a single common indirect channel and comprises: a channel estimator 1670, 1680, 1690 for estimating the extent of coupling between the common indirect channel and each of the receiver devices based on readings received by the transmitter device from the receiver devices; and a processor 1690 for determining a plurality of weighting values in dependence upon the estimated extents of the couplings; the transmitter 16 being operable to transmit a first signal via the direct differential mode over the first pair 21, to transmit a second signal via the direct differential mode over the second pair 22 and to transmit a combined signal onto the indirect channel, wherein the combined signal comprises a weighted sum of the first and second signals, the weighting being done in accordance with the determined weighting values; and wherein the transmitter further comprises a precoder 1640 for precoding the first, second and combined signals to pre-compensate them for the expected effects of cross-talk from the other ones of these signals, wherein the pre-coding of each signal, including the first and the second signals, is performed in dependence upon the determined weighting values.