Methods and systems are described for obtaining a set of carrier-modulated symbols of a carrier-modulated codeword, each carrier-modulated symbol received via a respective wire of a plurality of wires of a multi-wire bus, applying each carrier-modulated symbol of the set of carrier-modulated symbols to a corresponding transistor of a set of transistors, the set of transistors further connected to a pair of output nodes according to a sub-channel vector of a plurality of mutually orthogonal sub-channel vectors, recovering a demodulation signal from the carrier-modulated symbols, and generating a demodulated sub-channel data output as a differential voltage on the pair of output nodes based on a linear combination of the set of carrier-modulated symbols by controlling conductivity of the set of transistors according to the demodulation signal.

In a distribution shaping method, information compression and distribution shaping are executed at the same time. A symbol sequence of a predetermined length is allocated to an input bit sequence of a predetermined length on a one-to-one basis. In the allocation, a bit sequence smaller in entropy is allocated a symbol sequence smaller in average power.

Ultra-Wideband (UWB) technology exploits modulated coded impulses over a wide frequency spectrum with very low power over a short distance for digital data transmission. Today's leading edge modulated sinusoidal wave wireless communication standards and systems achieve power efficiencies of 50 nJ/bit employing narrowband signaling schemes and traditional RF transceiver architectures. However, such designs severely limit the achievable energy efficiency, especially at lower data rates such as below 1 Mbps. Further, it is important that peak power consumption is supportable by common battery or energy harvesting technologies and long term power consumption neither leads to limited battery lifetimes or an inability for alternate energy sources to sustain them. Accordingly, it would be beneficial for next generation applications to exploit inventive transceiver structures and communication schemes in order to achieve the sub nJ per bit energy efficiencies required by next generation applications.

Methods and systems are described for receiving a plurality of signals via a plurality of wires of a multi-wire bus, the plurality of signals corresponding to symbols of a codeword of a vector signaling code, generating, using an interconnected resistor network connected to the plurality of wires of the multi-wire bus, a plurality of combinations of the symbols of the codeword of the vector signaling code on a plurality of output nodes, the plurality of output nodes including a plurality of pairs of sub-channel output nodes associated with respective sub-channels of a plurality of sub-channels, and generating a plurality of sub-channel outputs using a plurality of differential transistor pairs, each differential transistor pair of the plurality of differential transistor pairs connected to a respective pair of sub-channel output nodes of the plurality of pairs of sub-channel output nodes.

A communication system in vehicle according to an aspect includes a transmission unit and a receiving unit. The transmission unit includes a modulation unit that generates a PWM signal having a predetermined duty ratio, an output unit that outputs the PWM signal, a feedback unit that feedbacks the PWM signal, and a transmission controller that controls the modulation unit using the feedbacked signal. The receiving unit includes a reception controller that determined whether to drive a load based on the PWM signal and a switching unit that is turned on or turned off based on the determination of the reception controller.

A communication method includes generating at a first node, a message of a predetermined message temporal length that indicates an input value to be encoded and transmitting, at the first node, a signal including a pulse train corresponding to the generated message. The signal including the pulse train includes two pulses that define start and end of the message, respectively, and further two pulses that define within the message, a first time interval calculated from the input value in accordance with a first function and a second time interval calculated from the input value in accordance with a second function, respectively.

An electrical system may include a processing circuit and one or more electrical components that emit thermal heat energy. The processing circuit may be configured to identify signal degradation or failure of an in-band communication channel between the electrical system and a second electrical system, identify a data message to transmit to the additional electrical system via an out-of-band communication channel, and direct the one or more electrical components to adjust an electrical workload to modulate and transmit the data message on the out-of-band communication channel as a recoverable sequence of thermal pulses.

A transmitter (TX)-side feedforward equalizer (FFE) includes one or more “roaming” filter taps which can be used to compensate reflections that occur at unpredictable and substantial time offsets from a main pulse. The roaming filter taps are realized in a hardware- and power-efficient manner by implementing a programmable delay serializer in which the phases of multi-rate clocks are switched to introduce binary weighted delays on the roaming tap. In this way a variable difference in latencies is introduced between the main and the roaming tap data paths. The TX-side FFE implementations provide a fully programmable roaming tap generator having a 1-Unit Interval (UI) resolution of delay setting integrated into the data serializer of the TX macro.

An apparatus includes a decoding circuit, and a communication bus that is configured to transfer a particular data payload and a control signal that indicates whether the particular data payload includes a mask value. The mask value is indicative of enabled and non-enabled data words in the particular data payload. The decoding circuit is configured to receive, from an encoding circuit via the communication bus, the particular data payload and the control signal. In response to a determination that the control signal indicates that the particular data payload does not include the mask value, the decoding circuit is configured to use a default value for the mask value, and to create an uncompressed data payload from the particular data payload using the default value, wherein the default value causes the decoding circuit to maintain positions of data words between the particular data payload and the uncompressed data payload.

It is made possible to favorably perform signal transfer between a plurality of daisy-chain-connected devices. There is a communication line for performing communication between a first electronic device and a second electronic device. A data generating section generates first data to be transmitted to the first electronic device. Then, a data input section inputs the first data to a first position on the communication line. In addition, a first data suppressing section is provided at a second position on the communication line, the second position being closer to the second electronic device than the first position is, and the first data suppressing section prevents the first data from being sent to the second electronic device.