Terminals, wireless communication methods, base stations and systems

Claims

1. A transmitter that reports the ability to support a low Peak-to-Average Power Ratio (PAPR) demodulation reference signal (DMRS) for a physical downlink shared channel (PDSCH), and the ability to support an extended DMRS type, A receiving unit that receives the DMRS settings of the PDSCH and receives downlink control information (DCI) indicating multiple DMRS ports for the PDSCH, A terminal having a control unit that determines that a DMRS sequence of the PDSCH is generated, depending on the Code Division Multiplexing (CDM) group, when the DMRS setting indicates that the extended DMRS type and the low PAPR DMRS are applied, and the DCI indicates a specific combination of DMRS ports.

2. The terminal according to claim 1, wherein the specific combination of DMRS ports is a combination of DMRS ports using multiple CDM groups.

3. The steps include reporting the ability to demonstrate support for low-peak-to-average power ratio (PAPR) demodulation reference signals (DMRS) of physical downlink shared channels (PDSCHs), and the ability to demonstrate support for extended DMRS types, The steps include receiving the DMRS settings of the PDSCH, The steps include receiving downlink control information (DCI) indicating multiple DMRS ports for the PDSCH, A wireless communication method for a terminal, comprising the steps of determining that if the DMRS setting indicates that the extended DMRS type and the low PAPR DMRS are applied, and the DCI indicates a specific combination of DMRS ports, then a DMRS sequence of the PDSCH dependent on the Code Division Multiplexing (CDM) group is generated.

4. A receiver that receives the ability to indicate support for a low Peak-to-Average Power Ratio (PAPR) demodulation reference signal (DMRS) of a physical downlink shared channel (PDSCH), and the ability to indicate support for an extended DMRS type, A transmitting unit that transmits the DMRS settings of the PDSCH and transmits downlink control information (DCI) indicating multiple DMRS ports for the PDSCH, A base station comprising: a control unit that generates a DMRS sequence of the PDSCH dependent on a Code Division Multiplexing (CDM) group, where the DMRS setting indicates that the extended DMRS type and the low PAPR DMRS are applied, and the DCI indicates a specific combination of DMRS ports.

5. A system having a terminal and a base station, The terminal includes a transmitter that reports the ability to support a low Peak-to-Average Power Ratio (PAPR) demodulation reference signal (DMRS) for a physical downlink shared channel (PDSCH), and the ability to support an extended DMRS type. A receiving unit that receives the DMRS settings of the PDSCH and receives downlink control information (DCI) indicating multiple DMRS ports for the PDSCH, The control unit determines that, if the DMRS setting indicates that the extended DMRS type and the low PAPR DMRS are applied, and the DCI indicates a specific combination of DMRS ports, then a DMRS sequence of the PDSCH dependent on the Code Division Multiplexing (CDM) group is generated. The base station includes a receiving unit that receives the ability to support the low PAPR DMRS and the ability to support the extended DMRS type, A transmitting unit that transmits the DMRS settings and the DCI, A system comprising: a control unit that generates the DMRS sequence dependent on the CDM group, where the DMRS setting indicates that the extended DMRS type and the low PAPR DMRS are applied, and the DCI indicates the specific combination of DMRS ports.