A repeater generates repetition signals by repeating an uplink signal over a plurality of subframes. If the plurality of subframes do not include a transmission candidate subframe of a sounding reference signal used to measure uplink reception quality, a controller sets a first transmission format to all the plurality of subframes, and if the plurality of subframes include the transmission candidate subframe, the controller sets a second transmission format to all the plurality of subframes. A transmitter transmits the repetition signals using the set transmission format.

The present invention is designed so that communication is performed properly when contention-based UL transmission is used. A user terminal has a transmission section that transmits a first reference signal and a UL data signal, without a UL transmission indication from a radio base station, and a control section that controls generation of the first reference signal by using code resource associated with the user terminal, and the control section controls generation of the first reference signal by using more code resources than code resources that can be used for a second reference signal that is transmitted with the UL data signal in response to the UL transmission indication.

The present invention is designed so that communication is performed properly when contention-based UL transmission is used. A user terminal has a transmission section that transmits a first reference signal and a UL data signal, without a UL transmission indication from a radio base station, and a control section that controls generation of the first reference signal by using code resource associated with the user terminal, and the control section controls generation of the first reference signal by using more code resources than code resources that can be used for a second reference signal that is transmitted with the UL data signal in response to the UL transmission indication.

A terminal is disclosed including a transmitter that transmits a demodulation reference signal for an uplink control channel; a receiver that receives: frequency hopping information indicating that frequency hopping of the uplink control channel is enabled, and information regarding a resource block index corresponding to a first frequency hop and a resource block index corresponding to a second frequency hop; and a processor that determines a sequence of the demodulation reference signal based on the frequency hopping information regardless of whether a distance between the first frequency hop and the second frequency hop is zero. In other aspects, a radio communication method, a base station, and a system are also disclosed.

A terminal is disclosed including a transmitter that transmits a demodulation reference signal for an uplink control channel; a receiver that receives: frequency hopping information indicating that frequency hopping of the uplink control channel is enabled, and information regarding a resource block index corresponding to a first frequency hop and a resource block index corresponding to a second frequency hop; and a processor that determines a sequence of the demodulation reference signal based on the frequency hopping information regardless of whether a distance between the first frequency hop and the second frequency hop is zero. In other aspects, a radio communication method, a base station, and a system are also disclosed.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a downlink communication that includes one or more codepoints indicating a plurality of transmit precoder matrix indicator (TPMI) indices and/or a sounding reference signal (SRS) resource indicator (SRI) codepoint indicating one or more SRS resources. The UE may identify, based at least in part on the one or more codepoints, one or more TPMI indices, of the plurality of TPMI indices, for one or more repetitions of a codebook-based PUSCH transmission and/or may identify, based at least in part on the SRI codepoint, one or more SRS resources for the one or more repetitions. Numerous other aspects are provided.

A radio communication apparatus includes spreading circuitry that spreads a response signal using a first set of orthogonal sequences to produce a spread response signal. Each orthogonal sequence in the first set has a first length. The spreading circuitry also spreads a reference signal using a second set of orthogonal sequences to produce a spread reference signal. Each orthogonal sequence in the second set has a second length that is shorter than the first length. A radio transmitter transmits the spread response signal and the spread reference signal.

A radio communication apparatus includes spreading circuitry that spreads a response signal using a first set of orthogonal sequences to produce a spread response signal. Each orthogonal sequence in the first set has a first length. The spreading circuitry also spreads a reference signal using a second set of orthogonal sequences to produce a spread reference signal. Each orthogonal sequence in the second set has a second length that is shorter than the first length. A radio transmitter transmits the spread response signal and the spread reference signal.

In the present invention, regarding a narrowband used in a subframe for transmitting uplink data, if a switch is made from a first narrowband used in a first subframe to a second narrowband that is different from the first narrowband, with respect to a second subframe continuing to the first subframe, a final one symbol of the first subframe and an initial one symbol of the second subframe are punctured and set as a retuning time to transmit the uplink data in the first narrowband and the second narrowband.

In the present invention, regarding a narrowband used in a subframe for transmitting uplink data, if a switch is made from a first narrowband used in a first subframe to a second narrowband that is different from the first narrowband, with respect to a second subframe continuing to the first subframe, a final one symbol of the first subframe and an initial one symbol of the second subframe are punctured and set as a retuning time to transmit the uplink data in the first narrowband and the second narrowband.