Abstract: Duplex communications are facilitated. In connection with various example embodiments, current sources are used to drive transistor-based circuits coupled across a first resistive circuit, to send signals on a communications medium. While driving the transistor-based circuits, the current sources are used to drive reference transistor-based circuits coupled across a second resistive circuit. A differential output signal based upon a power-related value across the first resistive circuit, less a power-related value across the second resistive circuit. This differential output signal characterizes a power-related value corresponding to a received signal on the communications medium, as gleaned from a total signal corresponding to both transmitted and received signals, less a signal corresponding to the transmitted signal.

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 distributed antenna system includes a master unit including a downlink RF input operable to receive an RF input signal from a downlink port of a base station, a first optical port, and a second optical port. The distributed antenna system also includes a first remote unit coupled to the first optical port. The first remote unit comprises a downlink antenna port and a first uplink antenna port and a second remote unit coupled to the second optical port of the master unit. The second remote unit comprises a downlink antenna port and a second uplink antenna port. The master unit is operable to transmit a first RF signal associated with the first RF uplink signal to a first uplink port of the base station and transmit a second RF signal associated with the second RF uplink signal to a second uplink port of the base station.

Abstract: A data communications system having a plurality of communication devices including a host having a first receiver and a second receiver; and one or more clients, each client including a transmitter coupled between a signal node and a transmitter node, the transmitter selectively transmitting a multistate signal from the signal node to the transmitter node; and a single conductor daisy-chain loop redundantly communicating each multistate signal from each the transmitter to both receivers, the single conductor daisy-chain loop electrically communicating each transmitter node to the receivers. A data communications method including a) transmitting selectively a multistate signal from each of one or more clients; b) communicating electrically each multistate signal to a first location on a host using a single conductor coupled to each the client; and c) communicating electrically each multistate signal to a second location on the host using the single conductor.

Abstract: A multiple-input multiple-output (MIMO) capable system is contemplated. The communication system may include a signal processor configured to separate an input stream into multiple signal paths to facilitate simultaneous transport through a communication medium. The capability to simultaneously transmit multiples signal paths may be beneficial in order to maximize throughput and/or minimize expense.

Abstract: A video multiviewer system may include a plurality of video inputs and a multiviewer video processor coupled to the plurality of video inputs for generating video data based upon the plurality of video inputs. The system may further include a display coupled to the multiviewer video processor for displaying multiple video windows based upon the video data, and at least one user input device. The multiviewer video processor may permit scrolling among the multiple video windows displayed on the display at a given instant and at least one other video window not displayed on the display at the given instant based upon the at least one user input device.

Abstract: Aspects of the present disclosure are directed towards a circuit-based apparatus for receiving data communications over power distribution lines that carry power using alternating current (AC). The apparatus has a processing circuit that is configured and arranged to receive an input signal representing the data communications over power distribution lines. For a quadrature encoded signal, the input signal is separated into intermediary signals representing a real portion of and an imaginary portion. The processing circuit can then determine timing information from the real portion of and the imaginary portion. The intermediary signals can then be decimated according to a variable rate of decimation that is responsive to the determined timing information. The decimated intermediary signals are also filtered.

Abstract: In a master apparatus, a reference device generates a reference signal, a power feeding signal generation portion divides or multiples a frequency of the reference signal to generate a power feeding signal, a first communication carrier generation portion divides or multiples the frequency of the reference signal to generate a first communication carrier, a communication signal generation portion generates a communication signal, and a superimposition portion superimposes the communication signal on the power feeding signal.

Abstract: A signal extender system including a first electronic apparatus, a second electronic apparatus, and a signal extender. The signal extender system includes a transmission module, a receiving module, and pairs of differential transmission lines. The receiving module includes a timing memory unit. The transmission module receives a digital image differential signal including differential data signals, a differential timing signal, and a two-way differential signal. A first pair of differential transmission lines, a second pair of differential transmission lines, and a third pair of differential transmission lines of the pairs of differential transmission lines transmit the differential data signals respectively. A fourth pair of differential transmission lines alternately transmits the two-way differential signal and a part of differential timing signal.

Abstract: A network infrastructure for mobile machines which are usable in explosive areas, having inherently safe participants and not inherently safe network participants the latter being arranged in pressure-resistant housings. The machine has at least one controller for actuating at least one not inherently safe participant. In order to provide a network infrastructure which avoids the drawbacks of the prior art, the machine has, outside the pressure-resistant housing for the first controller, at least one second, inherently safe controller for actuating at least one inherently safe participant, wherein the first controller forms a data distributor for a plurality of not inherently safe participants and the second controller forms a data distributor for a plurality of inherently safe participants, and wherein the first data distributor and the second data distributor are linked via an electrically decoupled data communication link.

Abstract: A network receiver and the adjusting method thereof, the network receiver includes a first delay unit, a second delay unit, a first processing unit and an adjusting circuit. The first delay unit is for delaying a first signal received from a first transmission line to generate a delayed first signal. The second delay unit is for delaying a second signal received from a second transmission line to generate a delayed second signal. The first processing unit is for processing a difference between the delayed first signal and the delayed second signal to generate first data. The adjusting circuit adjusts the first and second delay units to have a plurality of delay amount combinations, the first processing unit generates a plurality of first data respectively corresponding to the delay amount combinations, and the adjusting circuit adjusts delay amount of the first and second delay units according to the first data.

Abstract: A method, system, and devices are provided that create a network over existing power lines. Two or more modules can establish the network for two or more devices in communication with each other. The modules include components that register device(s) and determine the processing of the data signal being sent over the power line network.

Abstract: Methods and apparatus for the selection and/or configuration of scrambling operations to accommodate e.g., both scrambling and non-scrambling connections (such as to e.g., legacy type devices). In one embodiment, media interface devices (such as e.g., HDMI (High-Definition Multimedia Interface)) devices may provide enhanced scrambling capabilities; solutions disclosed herein provide, among other things, support for both enhanced scrambling capable devices and legacy devices, and enable a device to determine the scrambling capabilities of a connected device.

Abstract: In a differential signal test mode, the first control circuit causes, in response to the first control signal, the differential signal generating circuit to generate the differential signal depending upon the data signal and output the differential signal. The second control circuit stops the operation of the common mode signal generating circuit in response to the second control signal. In a common mode signal test mode, the first control circuit causes, in response to the first control signal, the differential signal generating circuit to generate a fixed differential signal and output the differential signal. The second control circuit causes, in response to the second control signal, the common mode signal generating circuit to generate the common mode signal depending upon the clock signal and output the common mode signal.

Abstract: A serial link receiver comprises first and second input terminals for receiving positive and negative inputs of a serial data signal, first and second broadband matching T-coils coupled to the first and second input terminals, first and second AC/DC coupling networks coupled to the first and second broadband matching T-coils, and a common mode level shifter coupled to the outputs from the first and second AC/DC coupling networks. This receiver architecture combines the ability to have a wide bandwidth input and pass through data signals at both low and high frequencies. This AC and DC coupled front end also incorporates the feature of a common mode level shifting network to place the common mode of the signal at the optimum point for the first active amplifier stage.

Abstract: A system for communicating data comprises a clock channel configured to transmit a clock signal at a predetermined rate and at least one data channel configured to transmit data as a sequence of blocks of multi-level symbols being sent at a fixed multiple of the clock rate. Each block of multi-level symbols comprises a sequence of at least three multi-level symbols. Each multi-level symbol has an analog voltage level selected from a predetermined number of possible values, the predetermined number being an integer greater than two. The fixed multiple of the clock rate is an integer greater than one.

Abstract: One embodiment described herein includes a method for transmitting a signal. The method includes generating a Manchester encoded data stream and combining the Manchester encoded data stream with an amplified clock signal to produce an amplitude modulated signal having a zero crossing at each edge of the amplified clock signal. The amplitude modulated signal can then be sent over a communication medium.

Abstract: A telecontrol energy-saving apparatus for simultaneous transmission of multiple signals with powerline technology comprises a supervision control unit, and at least one peripheral unit, equipped with an electricity network user device, and with a digital instrument.

Abstract: A service provider device of a local communication network communicates a first frame with an electric vehicle via a first communication medium to associate with the electric vehicle, establish a communication link with the electric vehicle, and to add the electric vehicle to the local communication network. After an association process between the electric vehicle and the service provider device is successfully completed, the electric vehicle and/or the service provider device can execute operations that extend the utility of their respective communication devices by switching to a new communication medium. By switching to the new communication medium, the electric vehicle and/or the service provider device can connect to a remote communication network. The service provider device communicates a second frame with at least a network device of the remote communication network via the new communication medium.

Abstract: Aspects of the present disclosure are also directed towards a method that includes maintaining a transmission period which has a start time and an end time synchronized to metrological time. Further, this method, in response to the start time, begins transmission of a frame, which includes a plurality of symbols. This transmission occurs over power distribution lines that carry power using alternating current (AC). This method also includes synchronizing a transmission time for each symbol of the plurality of symbols according to a time-based parameter of the AC. In response to reaching an end of the frame, a synchronization symbol period is determined for a synchronization symbol, as a function of the transmission times, for the plurality of symbols and time from the end of the frame to the end time. The synchronization symbol is then transmitted on the power distribution lines.

Abstract: A first modular Ethernet connector and a coupled corresponding second modular Ethernet connector may communicate data based on Ethernet standards. The Ethernet connectors may be configurable and comprise at least twelve contact positions. Different connector configurations may support widely different data rates. The Ethernet connectors may fit within a handheld device and/or may be sized to fit greater than twenty-four connectors in a 1 RU faceplate of a 19 inch rack. A variable number of conductor and/or ground contact positions may be unpopulated or populated with contacts of various materials. The Ethernet connectors may be configured with a properly fitting latching mechanism, with connector shielding and/or to ground cable shielding. The Ethernet connectors may be sized and fitted for secure coupling. The Ethernet connectors may be coupled to a twisted pair cable. Differential pair conductors are terminated adjacently. The Ethernet connectors may comprise POE, a PHY and/or an antenna.

Abstract: An alternating current (AC) zero-crossing indicator apparatus including a current adjusting circuit for adjusting a DC signal current for a duration of time the same as the duration of a received zero-crossing detection signal. The zero-crossing indicator apparatus additionally includes a voltage retainer for maintaining a constant DC voltage applied to a connected load during the adjusting of the DC signal current. Also included is a zero-crossing sensor for generating a zero-crossing indication signal responsive to sensing of the adjusting of the DC signal current.

Abstract: Systems and methods are described for providing a throughput of 10 Gbps or more in a coaxial cable network and which operate at high frequencies above the existing services on home coax in the range 2 GHz to 10 GHz, or more. The network uses a wide signal bandwidth, in the range, for example, of 8 GHz. Operating above the CATV band and satellite services, the network coexists with these services without mutual interference. The system could be used in networking systems, such as MoCA 3 and Access systems. This is achieved by using a splitter with a low loss and low isolation in the 2-10 GHz range at the point-of entry (POE) of the network signal. Alternatively, an active node to provide a signal booster or a repeater function at the point-of-entry (POE) can be used.

Abstract: A method of powerline communications between a plurality of nodes on a powerline communications (PLC) channel including a first node and a second node. At least one communication quality measure is determined for the PLC channel. Based on the communication quality measure, a preamble of a data frame is dynamically switched between a reference preamble having a reference symbol length including a reference number of syncP symbols and a reference number of syncM symbols and at least a first extended preamble having an extended symbol length that is greater than (>) the reference symbol length. The data frame is then transmitted on the PLC channel.

Abstract: An expansion of known serial data links, for example ETHERNET, published in IEEE802.3, for directly transmitting random events without having to carry out synchronization with a clock signal or having to wait for a cyclical transmission time. Two different, random events are represented using two differently coded individual pulses and are transmitted in an event-controlled manner. A jitter-free latency of 45 ns between the event and its reception is possible over a line length of 8 m, for example. The expansion is particularly suitable for the short, digital data links between a node and a plurality of modules, as are required in modern electrical discharge machines, machine tools and similar electronic systems.

Abstract: A method for remote crosstalk cancellation in an xDSL system is provided. The method includes: receiving, at a first transmitting end, a noise statistic related value fed back from a first receiving end, wherein the noise statistic related value reflects a numeric value of a signal-to-noise ratio of a first line; pre-coding, at the first transmitting end, the first signal and crosstalk source signals according to values of filtering parameters; and transmitting the pre-coded signals. A corresponding device for remote crosstalk cancellation is provided.

Abstract: Three-phase electrical power is used to distribute electrical power to electronic devices in a cluster. A power distribution system includes circuit breaker panels and power distribution units for providing electrical power to the electronic devices. The electrical connections within the power distribution system form a digital communication network that communicates identification codes for the purpose of identifying each electrical connection in the power distribution system. A cluster management entity may then collect the identification codes associated with each electrical connection in order to detect the actual configuration of the power distribution system. By further knowing the load of each electronic device and their association with entities of the power distribution system, the cluster management entity may determine the load on each phase and take steps to balance the load.

Abstract: A communication apparatus according to the present invention comprises first communication means configured to transmit differential signals serving as first information over a first wire pair; second communication means configured to transmit differential signals serving as second information over a second wire pair; and third communication means configured to transmit third information by transmitting one of differential signals over the first wire pair and transmitting the other of the differential signals over the second wire pair. It is possible to provide a communication apparatus that spurious emission is suppressed.

Abstract: The present disclosure includes systems and techniques relating to power line communications (PLC) systems and apparatus. In some implementations, a method includes determining information regarding a potential data rate to be used with a powerline communications (PLC) channel, reducing a bias current or voltage of an analog front end of a PLC transceiver based on the determined information to reduce power consumption of the analog front end of the PLC transceiver, and transmitting or receiving data over the PLC channel with the reduced bias current or voltage of the analog front end of the PLC transceiver.

Abstract: In communication method for communicating via a transmission channel to which first communication apparatuses communicating based on a first communication system, second communication apparatuses communicating based on a second communication system, and third communication apparatuses communicating based on a third communication system are connected, a data transmission domain and a notification domain for notifying a data transmission within the data transmission domain are allocated to the first communication apparatuses, the second communication apparatuses, and the third communication apparatuses, respectively. In the communication method, notices of the data transmission for each of the first communication apparatuses, the second communication apparatuses and the third communication apparatuses are transmitted within the notification domain, and the data transmission domain is reallocated in accordance with the notices transmitted from the first, second and third communication apparatuses.

Abstract: Systems and methods for synchronizing a power line communication system including a power line and one or more devices communicatively coupled to the power line. A mains frequency of the power line is estimated at the devices, and corresponding local frequencies of the devices are adjusted based on the corresponding estimated mains frequency. Data signals are transmitted from or received by the devices based on the adjusted local frequencies.

Abstract: A power line carrier communication apparatus which prevents leakage of an electromagnetic wave and stably operates while employing a simplified configuration is provided. The power line carrier communication apparatus may include a transmission circuit which is connected to a power line and which transmits a signal to the power line; a reception circuit which is connected to the power line and which receives the signal from the power line; and an output suppression circuit which is connected to the power line and which, by connecting a signal attenuating element between the transmission circuit and a common only when the transmission circuit transmits the signal, suppresses an output of the signal transmitted from the transmission circuit.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for transmitting data. In one aspect, a method obtains a baseline data rate for transmissions from a node that are received over a channel of a power line communications system and a set of available modulation techniques for the node. The set of available modulation techniques can include at least two modulation techniques with which the node is configured to encode data that are transmitted over the channel. Using the set of available modulation techniques, a modulation technique that is capable of providing at least the baseline data rate with at least a threshold confidence for the node is selected. In turn, data is provided to the node specifying the selected modulation technique.

Abstract: An apparatus for converting terminal polarity for RS communication includes a comparator configured to discriminate polarities of a first signal line and a second signal line by comparing voltage levels indicated on the first and second signal lines of a cable for RS-485 communication, a switch unit configured to connect a TRXD+ terminal to the first signal line and connect a TRXD? terminal to the second signal line, or to connect a TRXD+ terminal to the second signal line or connect a TRXD? terminal to the first signal line in response to a provided switch control signal, and a switch controller configured to transmit the switch control signal to the switch unit in response to a polarity discrimination result by the comparator relative to the first signal line and the second signal line.

Abstract: A splitter includes, in parallel between trunk terminals and branch terminals, a signal branching circuit that blocks distributed power and passes a PLC communication signal and a power branching circuit that blocks the communication signal and passes the distributed power. In the signal branching circuit, impedance viewed from the branch terminal side is matched with characteristic impedance of a power line and impedance viewed from the trunk terminal side is higher than impedance viewed from the branch terminal side, in the frequency band of the communication signal. In the power branching circuit, input/output impedance is set to be sufficiently higher than the impedance of the signal branching circuit viewed from the trunk terminal side, in the frequency band of the communication signal.

Abstract: In some embodiments, a method includes receiving, at a receiver of a first device via a channel of a communication medium, multiple data transmissions. Each data transmission of the multiple data transmissions has a guard interval of multiple guard intervals, wherein the multiple guard intervals have different lengths. The method includes determining, based on signal characteristics of the multiple data transmissions, the data transmission from among the multiple data transmissions having a preferred physical data rate. The method includes setting a length of an adjusted guard interval for the channel for data communication from a transmitter of a second device to the receiver of the first device via the communication medium, to a length of the guard interval for the data transmission having the preferred physical data rate.

Abstract: In a communications system for differential signals, a driver circuit is connected to a receiver circuit by a pair of differential signal lines. When data is not being transmitted, the differential signal lines are maintained at a predetermined electric potential, and when data is to be transferred, a differential signal is output at predetermined electric potentials. The receiver circuit switches between a power-down state and a normal state when detecting states of the electric potentials of the differential signal lines.

Abstract: A signal receiving device obtains information data based on a plurality of signals received at a plurality of antennas. The signal receiving device is divided into a first receiving unit and a second receiving unit. The first receiving unit carries out certain part of an entire receiving process, and the second receiving unit carries out the remaining part of the receiving process. The first receiving unit demodulates and synthesizes the received signals and decodes the synthesized signal to recover received information data. The first receiving unit modulates the received information data to obtain a modulation signal and transmits the modulation signal to the second receiving unit via a transmission cable. The second receiving unit recovers the received information data by demodulating the modulation signal received via the transmission cable, and obtains the information data by decoding the recovered information data.

Abstract: Techniques for de-modulating a high-supply-domain differential signal and a common-mode clock in a front-end receiver are described herein. In one embodiment, a method for receiving a signal comprises receiving the signal via a receiver input, the received signal comprising a differential signal and a common-mode clock signal. The method also comprises shifting the received signal from a first voltage range to a second voltage range that is lower than the first voltage range, and providing the shifted received signal on a first level-shifted signal line and a second level-shifted signal line. The method further comprises sensing voltage differences between the first and second level-shifted lines to recover the differential signal, and sensing common-mode voltages on the first and second level-shifted signal lines to recover the common-mode clock signal.

Abstract: A method and a device are provided for transmitting or receiving a clock signal. The method includes the step of transmitting or receiving at least two wave bands via a digital subscriber line, wherein a clock signal is conveyed via one of the at least two wave bands. The clock signal may be used for mobile clock synchronization.

Abstract: Disclosed herein is a device for monitoring the condition of a branch circuit. A device contains a switch that is normally open to prevent the occurrence of electric shock. An optical prong detector is provided to determine weather both the hot and neutral prongs of a plug have been inserted into the receptacle. The receptacle provides conductance upon determination of insertion of a plug into the receptacle. Additional features include GFI detection, current detection heat detection warning lights and an audible alarm. The receptacle includes communication abilities with remote devices to transmit data indicative of the state of the device.

Abstract: Three-phase electrical power is used to distribute electrical power to electronic devices in a cluster. A power distribution system includes circuit breaker panels and power distribution units for providing electrical power to the electronic devices. The electrical connections within the power distribution system form a digital communication network that communicates identification codes for the purpose of identifying each electrical connection in the power distribution system. A cluster management entity may then collect the identification codes associated with each electrical connection in order to detect the actual configuration of the power distribution system. By further knowing the load of each electronic device and their association with entities of the power distribution system, the cluster management entity may determine the load on each phase and take steps to balance the load.

Abstract: Nodes are connected in parallel between two transmission lines and configured to utilize a telecommunications standard of a differential transmission. At least one of the nodes includes two input/output terminals, a driver, a receiver, a resistor, and a comparator. The two input/output terminals are connected to the two transmission lines. The driver includes two output terminals connected to the two input/output terminals. The receiver includes two input terminals connected to the two input/output terminals. The resistor is connected between each of the two input/output terminals and one of a grand and a power supply voltage. The comparator compares a voltage between the transmission lines with a reference voltage to determine whether the transmission lines are in an idle state or in a communication state.

Abstract: A method provides digital communication over an electrical power supply cable between a management processor in a circuit breaker panel (CBP) and a management processor in a power distribution unit (PDU), wherein the CBP has a CBP identification code (ID) and the PDU has a PDU ID. The digital communication provides the CBP management processor with the PDU ID for the PDU that is connected through the electrical power supply cable to the CBP, or the digital communication provides the PDU management processor with the CBP ID for the CBP that is connected through the electrical power supply cable to the PDU. The method further comprises identifying the electrical power supply cable connection by communicating first and second endpoints of the electrical power cable connection to a cluster management entity, wherein the first endpoint is identified by the CBP ID and the second endpoint is identified by the PDU ID.

Abstract: A receiving unit converts a pulse received from a transmission unit into a digital output signal and send back the received pulse to the transmission unit via an isolated communication unit, when it receives the pulse transmitted from the transmission unit; the transmission unit includes: an edge pulse generating circuit for generating a pulse corresponding to a transition of the digital input signal between a first level and a second level; and a verification circuit configured to receive the pulse sent back from the receiving unit, determine whether or not the pulse has been sent back from the receiving unit, and generate an additional pulse when the verification circuit determines that the pulse has not been sent back from the receiving unit and is configured to transmit the pulses generated in the edge pulse generating circuit and in the verification circuit, to the receiving unit, via the isolated communication unit.

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 of detecting a signal transmitted over one phase of a multi-phase power distribution system, components of the signal concurrently appearing on all phases of the system. The method includes detecting the components of each signal appearing on each phase, including neutral, of the system. Detected signals are provided to a signal processor which processes them to produce a detected signal which is a composite of all the components. The signals are combined by a weighted summation scheme that takes into account signal and noise correlation properties to simultaneously maximize signal strength and suppress noise. If other signals are present on other phases of the system, any resulting interference is canceled out from the detected signal to further improve the quality of the detected signal.

Abstract: In the present invention, time information is sent through a common power line in executing home automation devices or using various industrial equipments. In the power line broadcasting, a small amount of data, such as time information, is transmitted unidirectionally, and long-distance power line broadcasting can be possible using carriers of a low frequency band. time setting for various instruments is automatically performed in response to a power signal after a breakdown of electric current, making unnecessary a user's action to perform the time setting, and the existing power line can be used without change.

Abstract: Systems and methodologies are described that facilitate constructing unitary matrices that may be utilized in linear precoding for multiple-input multiple-output (MIMO) wireless communication systems. Each unitary matrix may be generated by combining (e.g., multiplying) a diagonal matrix with a Discrete Fourier Transform (DFT) matrix. The unitary matrices may be utilized to provide feedback related to a channel and/or control transmission over a channel based upon obtained feedback.

Abstract: Apparatus (and related methods) for a power line communication network include a processor configured to receive beacons over a communication interface. The processor determines a link quality indicator (LQI) for each received beacon and ignores the beacons for at most a predetermined maximum number of beacon receptions when each LQI is below a threshold. The processor responds to a received beacon if the LQI for such received beacon exceeds the threshold or if a predetermined maximum number of beacons have been received with LQIs below the threshold.