Terminal, radio communication method, and base station

A radio communication method for a terminal, comprising:

• receiving a higher layer signaling for configuring a first enhanced Demodulation Reference Signal (DMRS) configuration type or a second enhanced DMRS configuration type, and receiving Downlink Control Information (DCI) for scheduling a Physical Uplink Shared Channel (PUSCH), the DCI including an antenna port indication;
• and
• controlling transmission of a DMRS for the PUSCH, based on an association between one or more DMRS ports and a number of Code Division Multiplexing (CDM) groups that correspond to a value of the antenna port indication,
• wherein when the first enhanced DMRS configuration type is configured, the one or more DMRS ports are any one or more DMRS ports of 8 existing DMRS ports and 8 enhanced DMRS ports, and when the second enhanced DMRS configuration type is configured, the one or more DMRS ports are any one or more DMRS ports of 12 existing DMRS ports and 12 enhanced DMRS ports.

A base station comprising:

• a transmitter that transmits a higher layer signaling for configuring a first enhanced Demodulation Reference Signal (DMRS) configuration type or a second enhanced DMRS configuration type, and transmits Downlink Control Information (DCI) for scheduling a Physical Uplink Shared Channel (PUSCH), the DCI including an antenna port indication;
• and
• a processor that controls reception of a DMRS for the PUSCH, based on an association between one or more DMRS ports and a number of Code Division Multiplexing (CDM) groups that correspond to a value of the antenna port indication,
• wherein when the first enhanced DMRS configuration type is configured, the one or more DMRS ports are any one or more DMRS ports of 8 existing DMRS ports and 8 enhanced DMRS ports, and when the second enhanced DMRS configuration type is configured, the one or more DMRS ports are any one or more DMRS ports of 12 existing DMRS ports and 12 enhanced DMRS ports.

A system comprising a terminal and a base station, wherein:

• the terminal comprises:
• a receiver that receives a higher layer signaling for configuring a first enhanced Demodulation Reference Signal (DMRS) configuration type or a second enhanced DMRS configuration type, and receives Downlink Control Information (DCI) for scheduling a Physical Uplink Shared Channel (PUSCH), the DCI including an antenna port indication;
• and
• a processor that controls transmission of a DMRS for the PUSCH, based on an association between one or more DMRS ports and a number of Code Division Multiplexing (CDM) groups that correspond to a value of the antenna port indication, and
• the base station comprises:
• a transmitter that transmits the higher layer signaling, and transmits the DCI,
• wherein when the first enhanced DMRS configuration type is configured, the one or more DMRS ports are any one or more DMRS ports of 8 existing DMRS ports and 8 enhanced DMRS ports, and when the second enhanced DMRS configuration type is configured, the one or more DMRS ports are any one or more DMRS ports of 12 existing DMRS ports and 12 enhanced DMRS ports.