Abstract: There is provided a imaging device including: an N-type region formed for each pixel and configured to perform photoelectric conversion; an inter-pixel light-shielding wall penetrating a semiconductor substrate in a depth direction and formed between N-type regions configured to perform the photoelectric conversion, the N-type regions each being formed for each of pixels adjacent to each other; a P-type layer formed between the N-type region configured to perform the photoelectric conversion and the inter-pixel light-shielding wall; and a P-type region adjacent to the P-type layer and formed between the N-type region and an interface on a side of a light incident surface of the semiconductor substrate.

Abstract: A receiving apparatus comprising: an antenna control unit; a variable characteristic antenna that receives MIMO signals transmitted from a plurality of antennas while switching an antenna characteristic on the basis of a control signal output from the antenna control unit; a conversion unit that samples reception signals received by the variable characteristic antenna at a predetermined sampling period; a signal division unit that extracts each signal from a plurality of signals corresponding to a plurality of antenna characteristics obtained by the conversion unit; and a MIMO signal demodulation unit that performs MIMO demodulation processing on a signal output from the signal division unit, wherein the variable characteristic antenna includes a plurality of parasitic elements, and the antenna control unit outputs a control signal to each of the parasitic elements by providing a time difference among the control signals.

Abstract: A wireless communication method according to an embodiment includes: capturing an image by each of relay devices; detecting a position of a person captured in the image on the basis of the image captured by each of the relay devices; determining whether or not a propagation path between a radiation unit and a wireless terminal is in a line of sight on the basis of the detected position of the person and the compass information transmitted by the wireless terminal; measuring each of strengths of radio waves transmitted by the wireless terminal each time the radiation unit changes a direction in which the radio waves are radiated; selecting the relay device in which the propagation path between the radiation unit and the wireless terminal is in the line of sight on the basis of each piece of line-of-sight information indicating a result of the determination; specifying, for each of the relay devices, a direction in which radio waves radiated by the radiation unit are strongest on the basis of each piece of stre

Abstract: A wireless communication method according to an embodiment includes: capturing an image by each of radio wave reflection devices; detecting a position of a person captured in the image on the basis of the image captured by each of the radio wave reflection devices; determining whether or not each of propagation paths between a reflection unit and a wireless terminal is in a line of sight on the basis of the detected position of the person and the compass information transmitted by the wireless terminal; selecting the radio wave reflection device in which the propagation path between the reflection unit and the wireless terminal is in the line of sight on the basis of each piece of line-of-sight information indicating a result of the determination; and performing control such that the wireless terminal and the base station perform wireless communication using radio waves reflected by the selected radio wave reflection device.

Abstract: A positioning system according to an aspect of the present invention includes a wireless base station device that communicates with a wireless terminal; one or more relay devices that relay a signal between the wireless terminal and the wireless base station device; and a positioning device that estimates a position of the wireless terminal on the basis of a first signal received by the wireless base station device from the wireless terminal via a first relay device, which is one of the one or more relay devices, a position of the one or more relay devices, and a position of the wireless base station device.

Abstract: A reflection direction control method includes an arrival direction estimation step of estimating an arrival direction of radio waves transmitted by a wireless terminal to one or more reflection units each including a plurality of reflection elements capable of dynamically changing phase characteristics when the radio wave is reflected, a phase control step of controlling a phase of a radio wave reflected by each of the plurality of reflection elements so that the reflection unit reflects, in a predetermined direction, the radio wave transmitted from the estimated arrival direction, and a switching step of switching between an antenna mode in which the reflection unit is caused to receive the radio wave of which the arrival direction is estimated and a reflection mode in which the reflection unit is caused to reflect the radio wave.

Abstract: The reflection direction control system includes a plurality of reflection units each including a plurality of reflection elements, a position estimation unit for estimating a position of each of the wireless terminals on the basis of radio waves transmitted to the plurality of reflection parts wireless terminals, a direction estimation unit for estimating an incident direction of the radio waves transmitted by each of the wireless terminals to the reflection units, a phase calculation unit for calculating a phase of the radio waves to be reflected so that the reflection unit reflects the radio waves made incident in the direction estimated by the direction estimation unit in a predetermined direction, and a phase control unit for controlling the phase of the radio waves reflected by each of the plurality of reflection elements on the basis of the phase calculated by the phase calculation unit.

Abstract: A relay system includes: one or more radiation units configured to form a beam in a predetermined direction by radiating radio waves from each of a plurality of elements; a detection unit configured to detect a physical environment on a radio wave propagation path that affects the beam formed by the radiation unit; a direction determination unit configured to determine a direction in which the radiation unit should form the beam based on the physical environment detected by the detection unit; a phase calculation unit configured to calculate a phase of radio wave to be radiated by each of the plurality of elements such that the radiation unit forms a beam in the direction determined by the direction determination unit; and a phase control unit configured to control the phase of the radio wave radiated by each of the plurality of elements based on the phase calculated.

Abstract: A reflection direction control system includes a reflection unit including a plurality of reflection elements, a direction estimation unit that estimates an incident direction of a radio wave transmitted by a base station to the reflection unit on the basis of base station position information indicating a preset position of the base station, a phase calculation unit that calculates a phase of the radio wave to be reflected by each of the plurality of reflection elements so that the reflection unit reflects the radio waves transmitted by the base station toward the wireless terminal on the basis of the position information of the wireless terminal received from the wireless terminal, and a phase control unit that controls the phase of the radio wave reflected by each of the plurality of reflection elements on the basis of the phase calculated phase calculation unit.

Abstract: A radio base station and a radio terminal perform radio communication based on a TDD scheme. A slot configuration includes allocation of a downlink period and an uplink period to the radio terminal. The relay reflects a signal transmitted from the radio base station or the radio terminal or receives and reradiates the signal to form a transmission path between the radio base station and the radio terminal. A relay characteristic includes a parameter determining a coverage area in which the transmission path is formed. A downlink relay characteristic during the downlink period and an uplink relay characteristic during the uplink period are not common but determined separately. Then, the relay characteristic during the downlink period is set to the downlink relay characteristic, and the relay characteristic during the uplink period is set to the uplink relay characteristic. In other words, the relay characteristic is switched between downlink communication and uplink communication.

Abstract: A wireless transmission device transmits a radio signal with a plurality of beam patterns and outputs transmission beam identifiers corresponding to the beam patterns to an object detection device, a wireless reception device receives the radio signal transmitted by the wireless transmission device with a plurality of beam patterns, measures received signal strength for each of the beam patterns and outputs reception beam identifiers and the received signal strength to the object detection device, and the object detection device detects an object within a detection area on the basis of the transmission beam identifiers, the reception beam identifiers and the received signal strength. This enables device-free object detection by utilizing a beamforming function, so that it is possible to achieve high detection accuracy while preventing increase in cost.

Abstract: Communication is performed between a radio base station and a radio terminal via a reflector. The radio base station transmits a measurement signal including a beam ID of a transmission beam for measuring communication quality between the radio base station and the radio terminal. The reflector reflects the measurement signal incident on the reflector in multiple reflection directions to generate multiple reflected measurement signals. Moreover, the reflector modulates the incident measurement signal during reflection to add information about a reflection direction ID being different for each of the multiple reflection directions to each of the multiple reflected measurement signals. The radio terminal demodulates a reflected measurement signal received from the reflector to acquire the reflection direction ID and the beam ID.

Abstract: A wireless communication system according to an embodiment includes: a wireless base station device configured to perform wireless communication of an orthogonal frequency division multiplexing (OFDM) method; a plurality of dynamic control relay devices for which a reradiation direction of incoming waves is dynamically controllable; and a wireless terminal device configured to perform wireless communication with the wireless base station device. The wireless base station device performs wireless communication with the wireless terminal device using a plurality of propagation paths that go through or do not go through the dynamic control relay devices, and a CP control unit provided in the wireless base station device changes the cyclic prefix length based on whether or not a propagation route from the wireless base station device to the wireless terminal device uses any dynamic control relay device.

Abstract: A wireless communication system according to an embodiment includes: a wireless base station device configured to perform wireless communication of an orthogonal frequency division multiplexing (OFDM) method; a plurality of dynamic control relay devices for which a reradiation direction of incoming waves is dynamically controllable by the wireless base station device; and a wireless terminal device configured to perform wireless communication with the wireless base station device using a plurality of propagation paths that go through or do not go through the dynamic control relay devices.

Abstract: To perform appropriate AMC control even if low latency is required. A transmission apparatus includes: a reception section that receives channel quality information communicated between the transmission apparatus and a reception apparatus; a control section that determines one or more first candidates for a value indicating a coding and modulation scheme based on the channel quality information, determines one or more second candidates for a value indicating the coding and modulation scheme based on a parameter related to service quality required for a service communicated between the transmission apparatus and the reception apparatus, and selects a value included in both of the first candidates and the second candidates; and a transmission section that transmits transmission data using the coding and modulation scheme corresponding to the selected value.

Abstract: To perform appropriate AMC control even if low latency is required. A transmission apparatus includes: a reception section that receives channel quality information communicated between the transmission apparatus and a reception apparatus; a control section that determines one or more first candidates for a value indicating a coding and modulation scheme based on the channel quality information, determines one or more second candidates for a value indicating the coding and modulation scheme based on a parameter related to service quality required for a service communicated between the transmission apparatus and the reception apparatus, and selects a value included in both of the first candidates and the second candidates; and a transmission section that transmits transmission data using the coding and modulation scheme corresponding to the selected value.

Abstract: Provided is a system that enables training for catheter surgery without using radiation. The system offering training for catheter surgery includes: a light source; a blood vessel model to which a catheter having a fluorescent agent applied thereto is inserted; a tank in which the blood vessel model is placed; a filter for rejecting white light that is not transmitted through the blood vessel model, of illuminating light from the light source; a camera for imaging fluorescence transmitted through the filter; a driver for changing the attitude of the light source; and a computer that performs a process of reversing black and white of an image signal output from the camera.

Abstract: If a situation in which it is difficult to make a decision about automatic processing without involving user intervention occurs, an inquiry is made to a user to clear such a situation and a response by the user to the inquiry is used as a decision criterion by which to decide the execution of automatic processing when a similar situation occurs later. If a change occurs in the broadcast time of a broadcast program set for timer-recording, this broadcast program overlaps, in broadcast time, another broadcast program set for timer-recording. However, if a need occurs for recording broadcast programs in excess of the number of broadcast programs that may be simultaneously recorded, an inquiry is made to the user which of these broadcast programs is to be preferentially recorded. A response by the user to this inquiry is also used as a criteria for selecting a broadcast program to be preferentially recorded if a similar situation occurs later.

Abstract: If a situation in which it is difficult to make a decision about automatic processing without involving user intervention occurs, an inquiry is made to a user to clear such a situation and a response by the user to the inquiry is used as a decision criterion by which to decide the execution of automatic processing when a similar situation occurs later. If a change occurs in the broadcast time of a broadcast program set for timer-recording, this broadcast program overlaps, in broadcast time, another broadcast program set for timer-recording. However, if a need occurs for recording broadcast programs in excess of the number of broadcast programs that may be simultaneously recorded, an inquiry is made to the user which of these broadcast programs is to be preferentially recorded. A response by the user to this inquiry is also used as a criteria for selecting a broadcast program to be preferentially recorded if a similar situation occurs later.