The invention relates to a method of cancelling noise present in a data signal received on an electrical bifilar line (L), implemented by a sender-receiver device (M) comprising a first transformer (TD), termed the differential mode circuit, comprising a primary side (TDp) and a secondary side (TDs), the primary side being connected by two wires to the bifilar line, a second transformer (TC), termed the common mode circuit, comprising a primary side (TCp) and a secondary side (TCs), the primary side being connected by a wire (c) to the primary side (TDp) of the differential mode circuit, and to an earth by another wire, the method comprising the following steps during an adjustment phase: obtaining a first value of voltage on the bifilar line, termed the differential mode voltage; obtaining a second value of voltage corresponding to a voltage at the level of the two wires of the secondary side of the common mode circuit, termed the image voltage of the common mode, resulting from said differential mode voltage; calculating the ratio between the second value and the first value, termed the noise conversion ratio; and the method comprising the following steps during a cancellation phase, subsequent to the adjustment phase; receiving the data signal originating from the bifilar line; simultaneously with the receiving step, obtaining a third value corresponding to the voltage at the level of the two wires of the secondary side of the common mode circuit; cancelling the noise in the data signal, by subtracting an estimation of the noise, the estimation being calculated by dividing the third value by said conversion ratio.

A radio device includes an amplifier; a storage that stores therein distortion compensation coefficients each of which compensates distortion that is generated in the amplifier; an updater that reads, from the storage in a first time section, the distortion compensation coefficients associated with a portion of an input signal input during the first time section and stores the read distortion compensation coefficients in a memory, and that updates, in a second time section, the distortion compensation coefficients stored in the memory and writes the updated distortion compensation coefficients in the storage; and a controller that controls the updater such that, when the same input signal is repeatedly input, the distortion compensation coefficients associated with a portion that is different from the portion of the input signal input the last time are stored in the memory in the first time section.

Example embodiments of the present disclosure relate to a line driver apparatus. In some example embodiments, an apparatus is provided. The apparatus includes a capacitive feed-through module and a driving module. The capacitive feed-through module includes a first pre-driver operable to receive input differential signals and delayed signals of the input differential signals, generate first drive signals from the input differential signals and the delayed signals, and equalize the first drive signals. The capacitive feed-through module also includes a capacitance reducing module arranged between the first pre-driver and transmission lines and operable to reduce parasitic capacitance at the transmission lines in response to the first drive signals. The driving module is coupled to the transmission lines and operable to generate output differential signals from the input differential signals for transmission on the transmission lines.

Using a transformation based at least in part on a non-simple orthogonal or unitary matrix, data may be transmitted over a data bus in a manner that is resilient to one or more types of signal noise, that does not require a common reference at the transmission and acquisition points, and/or that has a pin-efficiency that is greater than 50% and may approach that of single-ended signaling. Such transformations may be implemented in hardware in an efficient manner. Hybrid transformers that apply such transformations to selected subsets of signals to be transmitted may be used to adapt to various signal set sizes and/or transmission environment properties including noise and physical space requirements of given transmission environments.

A PLC modem (131-133) is prompted to increase, starting from a predetermined minimum transmit power, a transmit power of data transmission on a PLC channel (112) at a given time or time period defined with respect to a mutual time reference of a DSL channel (111) and the PLC channel (112). A DSL modem (121) is prompted to measure a signal-to-noise value at the given time or time period defined with respect to the mutual time reference. Mitigation of interference 190 between the PLC channel (112) and the DSL channel (111) becomes possible.

Various embodiments relate to an end of packet (EOP) circuit, including: a reset pulse generator circuit configured to generate a reset pulse when a input signal transitions to a new value; an analog counter circuit configured to receive a squelch signal to start the counter and to receive the reset pulse to reset the counter; and an EOP detector circuit configured to produce a signal indicative that the input signal is an EOP signal based upon an output of the analog counter circuit.

The method includes transmitting by a first remote communication unit an upstream symbol with a first structure onto a first communication line at a reference time point trf, wherein the reference time point trf is determined based on a time of reception of a downstream symbol with the first structure tFDX_DS_RX and a first propagation delay over the first communication line tPD1, as trf=tFDX_DS_RX−tPD1; transmitting by a second remote communication unit an upstream symbol with a second structure onto the second communication line at tTDD_US_TX=trf−tPD2 during a time interval assigned for upstream transmission on the second communication line, wherein tPD2 is a second propagation delay over the second communication line, so that the upstream symbol with the second structure transmitted by the second remote communication unit arrives at the access node at the reference time point trf.

Systems and methods are described for transmitting data over physical channels to provide a high bandwidth, low latency interface between a transmitting device and a receiving device operating at high speed with low power utilization. Communication is performed using group signaling over sets of four wires using a vector signaling code, where each wire of a set carries a low-swing signal that may take on one of four signal values. Topologies and designs of wire sets are disclosed with preferred characteristics for group signaling communications.

A circuit for compensation of baseline voltage wander operating at an input of an isolator is disclosed. The circuit can compensate electronically the frequency response of an isolation circuit (e.g., a transformer) by increasing the pass band in the low frequency region in order to minimize the baseline wander caused by low inductance windings. The compensation circuit can be used to inject a current ramp proportional to the amplitude and the duration of the pulse and inversely proportional to the open circuit inductance of the isolation circuit.

An electronic device includes a signal sender that sends a pair of transmission signals of mutually opposite phases to an external device via a pair of transmission paths. The signal sender differentiates each amplitude of the pair of transmission signals.