Provided are a communication device, an industrial machine, and a communication method that contribute to accurate evaluation of communication quality. The present invention comprises: a reception unit that receives a serial signal; and a signal string acquisition unit that samples the serial signal at second periods that are shorter than a first period, which is a 1-bit period of the serial signal, thereby acquiring a signal string corresponding to 1 bit of the serial signal.

A de-skew circuit, a de-skew method and a receiver are provided. The de-skew circuit includes N data synchronization circuits and a controller. An nth data synchronization circuit among the N data synchronization circuits includes an nth command detector and an nth buffer. The nth command detector changes an nth command detection signal when an nth input data stream satisfies a single channel condition. The nth buffer stores the nth input data stream in response to a voltage change of the nth command detection signal. The controller receives the nth command detection signal and changes a pop signal when a global channel condition is satisfied. The nth buffer outputs an nth timing-aligned data stream in response to a voltage change of the pop signal.

[Object] To adaptively adjust a symbol interval in accordance with a communication environment. [Solution] An apparatus including: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information for adjusting a symbol interval in a complex symbol sequence into which a bit sequence is converted is transmitted from the communication unit to a terminal, the control information being set on a basis of a predetermined condition.

A Faster-Than-Nyquist (FTN) signal transmission apparatus and method thereof. The signal transmission apparatus includes a pilot interference estimator and compensator configured to estimate interference on pilot symbols by a Faster-Than-Nyquist (FTN) signal generated by FTN modulating a sequence of data symbols, and generate a compensated pilot symbol sequence to cancel the estimated interference; a pilot FTN modulator configured to generate an FTN pilot signal in which inter-pilot symbol interference does not occur, by performing FTN pulse-shaping on the compensated pilot symbol sequence; and a transmitter configured to transmit an FTN data signal and the FTN pilot signal.

A de-skew circuit, a de-skew method and a receiver are provided. The de-skew circuit includes N data synchronization circuits and a controller. An nth data synchronization circuit among the N data synchronization circuits includes an nth command detector and an nth buffer. The nth command detector changes an nth command detection signal when an nth input data stream satisfies a single channel condition. The nth buffer stores the nth input data stream in response to a voltage change of the nth command detection signal. The controller receives the nth command detection signal and changes a pop signal when a global channel condition is satisfied. The nth buffer outputs an nth timing-aligned data stream in response to a voltage change of the pop signal.

An optical network includes a transmitter portion configured to (i) precode an input digitized stream of symbols into a precoded symbol stream, (ii) pulse shape the precoded symbol stream with an eigenvalue channel matrix, and (iii) transmit the pulse shaped symbol stream over a digital optical link. The optical network further includes a receiver portion configured to (i) recover the pulse shaped symbol stream from the digital optical link, (ii) decompose eigenvalues of the eigenvalue channel matrix from the recovered symbol stream, and (iii) decode the decomposed symbol stream into an output symbol stream.

A receiver includes an equalization circuit configured to output a data sample signal and an edge sample signal by sampling a data input signal according to clock signal, and to perform an equalization operation according to the data sample signal and the edge sample signal; and a clock gate circuit configured to select the clock signals from among a plurality of multi-phase clock signals according to a selection signal.

[Object] To adaptively adjust a symbol interval in accordance with a communication environment.

[Solution] An apparatus including: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information for adjusting a symbol interval in a complex symbol sequence into which a bit sequence is converted is transmitted from the communication unit to a terminal, the control information being set on a basis of a predetermined condition.

A receiver includes an equalization circuit configured to output a data sample signal and an edge sample signal by sampling a data input signal according to clock signal, and to perform an equalization operation according to the data sample signal and the edge sample signal; and a clock gate circuit configured to select the clock signals from among a plurality of multi-phase clock signals according to a selection signal.

The disclosed systems and methods are directed to transmitting and receiving symbols. In particular, splitting, a symbol dataset into symbol subsets, modulating, the symbol subsets using different sub-carriers, roll off factors and time acceleration factors, performing frequency shifting and combining the frequency shifted and modulated symbol subsets to generate a digital multiband (DMB) signal, transmitting and receiving the DMB signal, down converting the received DMB signal into a plurality of baseband signals, segregating the plurality of baseband signals in accordance with a manner by which the symbol subsets have been processed before transmission, forwarding a first portion of the plurality of baseband signals to a minimum mean square error (MMSE) based receiver, forwarding a second portion of the plurality of baseband signals to a matched filter-based receiver, and combining the output of the MMSE based receiver and matched filter-based receiver to generate an equivalent symbol dataset.