Nec Corporation

Mingqi Wu

Eiji Hankui

Keishi Kosaka

Hiroshi Toyao

Yoshiaki Kasahara

An object of the present disclosure is to provide a data processing device, a data processing method and a non-transitory computer readable medium capable of suppressing impairments of signal transmission. A data processing device includes at least one memory configured to store instructions and at least one processor configured to execute the instructions to: obtain input information bits; and generate a first output information bits and a second output information bits based on the input information bits, wherein the first output information bits correspond to constellation points of a constellation diagram on a first axis and the second output information bits correspond to constellation points of the constellation diagram on a second axis, and a probability of the constellation points on at least one of the first or the second axis follows a distribution, the distribution having a plurality of local maxima.

Data processing device, data processing method and computer readable medium for transmitting a carrier signal

To carry out automatic bias control to an optical modulator without a dither signal with reduced cost, an optical transmitter comprises a light source configured to output a light, an optical first modulator configured to modulate the light and output a first modulated optical signal, a DC component detector configured to detect a DC component of the first modulated optical signal and a controller configured to apply a first specific bias voltage identified based on the DC component to the optical first modulator.

Optical transmitter, optical transmission system, and method of transmitting an optical signal

An object is to actively control a phase of electromagnetic wave with high efficiency. A phase control device includes a phase control lens and a control circuit. The phase control lens includes metamaterial boards arranged in a first direction and separated from each other. Each metamaterial board shifts a phase of electromagnetic wave passing therethrough. The control circuit controls admittance distribution in a plane perpendicular to the first direction of each metamaterial board.

Phase control device, antenna system, and method of controlling phase of electromagnetic wave

A phase control device () includes a two-dimensional array of three-dimensional units () and is configured to control a phase of an electromagnetic wave passing through the three-dimensional units (). Each three-dimensional unit () includes a substrate () and an active control layer (). The active control layer () includes metal patches () and (), and a modulator () disposed between the two metal patches and connected to each of the two metal patches. The substrate () includes at least one bias line (or) connected to one of the two metal patches and extending in a direction perpendicular to a direction of an electric field of the electromagnetic wave.

Phase control device and communication device

An object is to advantageously control a phase of an electromagnetic wave with high efficiency at target operational frequency band. A phase control device () comprising a two-dimensional array of three-dimensional units () and configured to shift a phase of an electromagnetic wave passing through the three-dimensional units (). The two nearest three-dimensional units () having same phase shift coverage are configured such that the distance difference from phase center of the phase control device () to the units () is a wavelength of a reference frequency f, and the reference frequency fis higher than center frequency fof operational frequency band and not higher than the highest frequency fof the operational frequency band.

Phase control device, antenna system, and phase control method

The present invention provides a phase control plate including n layers (n&#x2265;4) of overlapping admittance sheets (-to-) each of which includes a plurality of plane unit cells, in which an admittance of a first plane unit cell included in an admittance sheet in a layer a (1&#x2264;a&#x2264;n) and an admittance of a second plane unit cell being included in an admittance sheet in a layer b (1&#x2264;b&#x2264;n and b&#x2260;a) and overlapping the first plane unit cell are different from each other.

Phase control plate

An object is to advantageously control a phase of an electromagnetic wave with high efficiency in wide bandwidth. A phase control device includes a two dimensional array of a plurality of cube units that are configured to shift a phase of an electromagnetic wave passing through the cube units. The cube units include at least two basic structures including different number of stacked metal layers separated from each other.

The present invention provides a polarization control plate including n layers (n&#x2265;4) of overlapping admittance sheets (-to-) each of which includes a plurality of plane unit cells, in which an admittance of a first plane unit cell included in an admittance sheet in a layer a (1&#x2264;a&#x2264;n) and an admittance of a second plane unit cell being included in an admittance sheet in a layer b (1&#x2264;b&#x2264;n and b&#x2260;a) and overlapping the first plane unit cell are different from each other, and an admittance of the plane unit cell in an x direction and an admittance of the plane unit cell in a y direction are different from each other.

Growing community of inventors

Tokyo, Japan

Mingqi Wu