Abstract: A radio transmission device includes a transmitter (209) and a controller (203). The transmitter (209) transmits a radio signal in which a demodulation reference signal is mapped. When a plurality of the demodulation reference signals are to be mapped respectively to first and second unit resources consecutive in a time domain of the radio signal, the controller (203) applies the same sequence to each of the plurality of the demodulation reference signals to be mapped to the first and the second unit resources.

Abstract: The present invention is designed to implement a format for UL reference signals and/or the like that is suitable for future radio communication systems. The user terminal of the present application includes a transmission section that transmits an uplink (UL) reference signal, and a control section that controls transmission of the UL reference signal, and the control section maps the UL reference signal to at least one resource element based on a first grid, which defines each resource element composed of a subcarrier and a symbol, and a second grid, which defines the arrangement interval of the UL reference signal in the frequency direction and the arrangement interval of the UL reference signal in the time direction.

Abstract: A user equipment (UE) includes a transmitter that transmits, to a base station (BS), Demodulation Reference Signals (DM-RSs) using Discrete Fourier Transform (DFT)-spread (s)-Orthogonal Frequency-Division Multiplexing (OFDM). The resource elements (REs) that do not multiplex the DM-RSs in an OFDM symbol are set as Null. The transmission power for transmission of the DM-RSs is different from transmission power for transmission of normal DM-RSs. The normal DM-RS is a DM-RS using a Cyclic Prefix (CP)-OFDM. The UE further includes a processor that determines the transmission power for the DM-RSs based on a reciprocal of frequency multiplexing density of the DM-RSs. The transmission power for the DM-RSs is two times more than the normal DM-RSs when a configuration of the DM-RSs is a DM-RS configuration type 1. The transmission power for the DM-RSs is three times more than the normal DM-RSs when a configuration of the DM-RSs is a DM-RS configuration type 2.

Abstract: Provided is an uplink signal configuration for a wireless communication system capable of performing uplink transmission by a plurality of communication schemes. A user equipment capable of performing uplink transmission by a plurality of communication schemes, includes: a transmission/reception unit configured to transmit and receive a radio signal to and from a base station; and a signal processing unit configured to process the radio signal, wherein the signal processing unit generates an uplink control signal and an uplink data signal according to a first uplink signal configuration mapping the uplink control signal to an uplink control channel and mapping the uplink data signal to an uplink shared channel, and wherein the transmission/reception unit simultaneously transmits the uplink control signal and the uplink data signal generated according the first uplink signal configuration according to a selected communication scheme.

Abstract: A radio transmission apparatus may include transmission section (105) that transmits a radio link signal, and control section (101). The radio link signal includes a phase variation correction reference signal used for correction of phase variation in a propagation channel in some cases. Control section (101) controls whether to map the phase variation correction reference signal to the radio link signal, or controls a mapping interval of the phase variation correction reference signal in the radio link signal, based on a time length or a type (Non-slot-based type or not) of a slot as a resource allocation unit.

Abstract: A radio transmission apparatus may include a transmission section (105) that transmits a radio link signal including a demodulation reference signal and a control section (101). The control section (101) may perform hopping of a position at which the demodulation reference signal is mapped to a radio resource for the radio link signal to a different frequency at a different time.

Abstract: A new configuration suitable for a downlink single carrier is provided in a downlink control signal of a radio communication system of the future. A user terminal includes: a reception section that receives a downlink signal including a downlink control signal and a downlink data signal; and a demodulation and decoding section that uses the downlink control signal to demodulate and decode the downlink data signal, in which the downlink control signal is mapped to signal transmission points of a single carrier in units of control channel elements.

Abstract: A first reference signal which is referred to during demodulation of a physical control channel, and a second reference signal which is referred to during demodulation of a physical data channel are mapped in time domains in the downlink signal. The first reference signal and/or the second reference signal are/is shared by a plurality of user terminals. A demodulation/decoding unit (110) of a user terminal (20) uses a channel estimation result based on the first reference signal to demodulate and decode a physical control channel addressed to the host device. Furthermore, the demodulation/decoding unit (110) uses a downlink control signal addressed to the host device, and a channel estimation result based on the second reference signal, to demodulate and decode a physical data channel addressed to the host device.

Abstract: The present invention is designed so that the decrease of spectral efficiency can be reduced even when coverage enhancement is attempted in communication by user terminals in which the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth. A radio base station communicates with a user terminal in which the bandwidth to use is limited to partial reduced bandwidths in a system bandwidth, and this radio base station has a transmission section that transmits a downlink signal to the user terminal in repetitions, and a control section that controls transmission by applying a transmission method to use frequency hopping or a transmission method to use frequency scheduling to the downlink signal, and the transmission section transmits information about the transmission method to apply to the downlink signal to the user terminal.

Abstract: In user terminal 20, reception section 204 receives one or more downlink signals mapped to a plurality of signal transmission points in a single carrier, and extraction section 214 extracts at least one of the one or more downlink signals that is assigned to at least one of the signal transmission points that belongs to a resource block group associated with user terminal 20, in which the resource block group is in units of a predetermined number of signal transmission points and the at least one of the one or more downlink signals is extracted based on a definition of the resource block group. This processing makes it possible to multiplex downlink signals for a plurality of terminals in a single-carrier transmission.

Abstract: In order to realize appropriate communications in a next-generation communication system, the present invention provides a user terminal having: a reception section that receives a synchronization signal and broadcast signals; and a control section that uses the synchronization signal as a basis to specify a radio resource and/or a communication parameter of a radio access scheme used for transmission of at least one of the broadcast signals.

Abstract: The present invention is designed so that downlink and/or uplink control information are transmitted and received properly in communication in which beamforming is used. A user terminal has a receiving section that receives a control channel candidate in a control channel field where a plurality of control channel candidates are able to be mapped in one subframe, and a control section that exerts control to decode control information based on the control channel candidate received in the receiving section. In the control channel field, different beams are associated with different symbols, and the control channel candidate is mapped to at least one of the different symbols.

Abstract: In user terminal 20, control section 202 determines signal waveforms according to a signal-waveform switching pattern notified by control section 102 of base station 10, and indicates the signal waveforms to preprocessing section 205, signal detection section 207, and post-processing section 208 for each TTI. Configuration IDs are assigned to respective signal-waveform switching patterns, and signal waveforms that are to be transmitted in TTIs and that are specified by the TTI index are configured for each of the Configuration IDs. With this configuration, a plurality of signal waveforms whose symbol lengths are different from one signal waveform to another are used together while no symbol spans two adjacent TTIs.

Abstract: Disclosed is a downlink signal configuration for transmitting a downlink control signal for uplink transmission in a radio communication system capable of performing uplink transmission by a plurality of communication schemes. An aspect of the present invention relates to a base station including a scheduler configured to schedule radio resources to user equipment capable of performing uplink transmission by a plurality of communication schemes; and a scheduling information notification unit configured to notify scheduling information indicating the radio resources scheduled to the user equipment for the uplink transmission, wherein the scheduling information indicates a start radio resource block group among contiguously scheduled radio resource block groups and a number of scheduled radio resource block groups.

Abstract: The present invention is designed to ensure the robustness of beams addressed to user terminals and/or to properly recover beams addressed to user terminals when beam forming is adopted. A user terminal according to the present invention has a receiving section that receives downlink control (DL) information via a downlink control channel (DCI), and a control section that monitors a plurality of DL control channel candidates in a search space and detects the DCI. The control section determines the resource units that constitute each of the plurality of DL control channel candidates based on at least one of information related to beams in which the plurality of DL control channel candidates are provided, the number of DL control channel candidates provided in the beams and the number of these beams.

Abstract: Provided is an uplink signal configuration for a wireless communication system capable of performing uplink transmission by a plurality of communication schemes. A user equipment capable of performing uplink transmission by a plurality of communication schemes, includes: a transmission/reception unit configured to transmit and receive a radio signal to and from a base station; and a signal processing unit configured to process the radio signal, wherein the signal processing unit generates an uplink control signal and an uplink data signal according to a first uplink signal configuration mapping the uplink control signal to an uplink control channel and mapping the uplink data signal to an uplink shared channel, and wherein the transmission/reception unit simultaneously transmits the uplink control signal and the uplink data signal generated according the first uplink signal configuration according to a selected communication scheme.

Abstract: There is provided user equipment of a radio communication system including a base station and the user equipment. The user equipment includes a creation unit that creates an uplink reference signal in accordance with a predetermined uplink reference signal configuration that is reported from the base station, or a predetermined uplink reference signal configuration that is defined in a specification; and a transmission unit that transmits the created uplink reference signal. In the predetermined uplink reference configuration, frequency resources for transmitting the uplink reference signal are discretely mapped in a frequency direction in one symbol within a predetermined time domain.

Abstract: Provided is a user equipment in a radio communication system including a base station and the user equipment. The user equipment includes: an acquisition unit that acquires a first transmission power parameter in a case of using OFDM in an uplink and a second transmission power parameter in a case of using DFT-s-OFDM in the uplink; and a control unit that controls transmission power of an uplink signal by using the first transmission power parameter in a case of using ODFM in the uplink, and controls transmission power of the uplink signal by using the second transmission power parameter in a case of using DFT-s-OFDM in the uplink.

Abstract: A user equipment according to one embodiment of the present invention is a user equipment that transmits an uplink signal to a base station using one of a multicarrier scheme and a single carrier scheme, which includes a reception unit that receives downlink control information from the base station through a downlink control channel, a determination unit that determines whether the multicarrier scheme is used or the single carrier scheme is used based on the received downlink control information, and a transmission unit that transmits the uplink signal using the determined scheme.

Abstract: A user equipment according to one embodiment of the present invention includes a reception unit that receives signal waveform configuration information related to either or both of a multicarrier scheme and a single carrier scheme to be applicable in uplink communication from a base station, a setting unit that sets the received signal waveform configuration information, and a transmission unit that transmits an uplink signal in accordance with the set signal waveform configuration information.