Sharp Kabushiki Kaisha Corporation

Fg Innovation Company Limited

Atsushi Shirakawa

Hiromichi Tomeba

Ryota Yamada

Hideo Namba

Yasuhiro Hamaguchi

Osamu Nakamura

Jungo Goto

Kazuhiko Fukawa

Hideo Nanba

Takamitsu Kitayama

Tetsuo Ueno

A communication apparatus that maintains a first connection and a second connection, the communication apparatus including a frame generator configured to generate a first frame and a second frame, and a transmitter configured to transmit the first frame based on the first connection and transmit the second frame based on the second connection, wherein a frame length of the first frame and a frame length of the second frame are configured based on destination information of the first frame and destination information of the second frame, respectively.

Communication apparatus and communication method

Provided are communication apparatus and a communication method that allow for secure communication even in a case that an eavesdropper has multiple antennas. An apparatus includes a transmitter configured to transmit a constant amplitude signal from three or more transmit antennas; a controller configured to control a phase of the constant amplitude signal, based on channel information and a target symbol; and a modulation unit configured to generate a modulation symbol from bits. The target symbol is generated by multiplying the modulation symbol by an amplitude coefficient.

A base station apparatus provided with a function of performing communication using multiple beams implements appropriate beamforming while reducing interference power, thereby communication quality becomes stable and frequency efficiency or throughput is improved. The base station apparatus according to the present invention is a base station apparatus for communicating with a terminal apparatus, the base station apparatus including: a transmitter configured to transmit a synchronization signal block including a synchronization signal in a prescribed transmission window; and a controller configured to configure a size of the prescribed transmission window in which the synchronization signal block is transmitted, in which the transmitter notifies the terminal apparatus of information associated with QCL between two of the synchronization signal blocks transmitted in the prescribed transmission window.

Transmission and reception of synchronization signal blocks in a wireless network

A terminal apparatus and a communication method are provided. The terminal apparatus communicates with a base station apparatus. The terminal apparatus includes a receiver and a measurement unit. The receiver is configured to receive downlink signals and configuration information in a first component carrier and a second component carrier. The measurement unit is configured to calculate Channel State Information (CSI) of the first component carrier and the second component carrier. In a case that spatial Quasi-coloration (QCL) for reception parameters is configured between the first component carrier and the second component carrier in the configuration information, the CSI of the first component carrier and the CSI of the second component carrier are calculated with a same reception parameter.

Base station apparatus, terminal apparatus, and communication method

A base station apparatus according to the present invention includes a transmitter configured to transmit a downlink signal by using a first component carrier and a second component carrier, and a receiver configured to receive an uplink signal transmitted by the terminal apparatus by using at least the second component carrier. The transmitter transmits spatial relation information in the uplink signal, the spatial relation information is information indicating a spatial domain transmission filter for transmitting the uplink signal, and the spatial relation information in the second component carrier includes information indicating the first component carrier.

A terminal apparatus according to an aspect of the present embodiment acquires multiple pieces of sounding reference signal (SRS) resource set configuration information indicating a configuration of multiple SRS resources, transmits an SRS and an uplink shared channel (PUSCH) based on the multiple SRS resources, acquires information (SRI) indicating one of the multiple SRS resources included in a piece of SRS resource set configuration information of the multiple pieces of SRS resource set configuration information, from control information (DCI) transmitted via a downlink control information channel (PDCCH), and acquires, from the DCI, information indicating whether only one of the multiple pieces of SRS resource set configuration information is associated with the PUSCH.

Terminal apparatus, base station apparatus, and communication method

A terminal apparatus for communicating with a base station apparatus, the terminal apparatus including: a receiver configured to receive downlink control information and a downlink shared channel; and a signal detection unit configured to demodulate the downlink shared channel (PDSCH) by using the downlink control information, wherein the downlink control information includes information for indicating an antenna port number and the number of code division multiplexing (CDM) groups for a demodulation reference signal (DMRS), each of the CDM groups indicates a DMRS port to be multiplexed by CDM, the PDSCH is demodulated in consideration of a power ratio of the DMRS and the PDSCH, and whether or not to consider powers of the DMRS and the PDSCH, based on the number of the CDM groups, is determined based on the downlink control information.

A base station apparatus controls an access scheme for each radio resource by using higher layer signaling such that only signals generated by a same type of a signal generation method are multiplexed for each radio resource.

Communication apparatus

A receiver device in accordance with the present invention (for example, wireless LAN device) includes: a radio frequency signal processor section converting an incoming radio frequency signal to a lower frequency; an RSSI circuit (reception strength sensor section) sensing the signal strength of the radio frequency signal; an intermediate frequency signal processor section converting a signal from the radio frequency signal processor section to an even lower frequency; a digital demodulator section (demodulator section) demodulating a signal from the intermediate frequency signal processor section; and a power control circuit controlling power supply to circuits in the intermediate frequency signal processor section which makes up part of the analog section (AGC circuit, IF mixer circuit, LPF circuit, and amplifier circuit) according to a result of sensing by the RSSI circuit. The structure provides a power saving receiver device.

Receiver device, communications device, wireless LAN device, power control method for a receiver device, power control program for a receiver device, and storage medium

Growing community of inventors

Sakai, Japan

Atsushi Shirakawa