User terminal, base station, and radio communication method for mapping a demodulation reference signal

A terminal, comprising:

• a receiver that receives a signal of a downlink shared channel;
• and
• a processor that controls reception of a demodulation reference signal included in the downlink shared channel based on one of a first mapping method or a second mapping method, the first mapping method being a method in which the demodulation reference signal is mapped to a fixed symbol within a slot of the downlink shared channel, the second mapping method being a method in which the demodulation reference signal is mapped to a top symbol of symbols for which the downlink shared channel is scheduled.

A terminal, comprising:

• a receiver that receives a signal of a broadcast channel;
• and
• a processor that controls reception of a demodulation reference signal included in the broadcast channel based on a mapping method in which the demodulation reference signal is mapped to a fixed symbol within a slot of the broadcast channel.

A terminal, comprising:

• a processor that maps a demodulation reference signal based on one of a first mapping method or a second mapping method, the first mapping method being a method in which the demodulation reference signal is mapped to a fixed symbol within a slot of an uplink shared channel, the second mapping method being a method in which the demodulation reference signal is mapped to a top symbol of symbols for which the uplink shared channel is scheduled;
• and
• a transmitter that transmits the demodulation reference signal.

A base station, comprising:

• a processor that maps a demodulation reference signal based on one of a first mapping method or a second mapping method, the first mapping method being a method in which the demodulation reference signal is mapped to a fixed symbol within a slot of a downlink shared channel, the second mapping method being a method in which the demodulation reference signal is mapped to a top symbol of symbols for which the downlink shared channel is scheduled;
• and
• a transmitter that transmits the demodulation reference signal.

A base station, comprising:

• a processor that maps a demodulation reference signal to a fixed symbol within a slot of a broadcast channel;
• and
• a transmitter that transmits the demodulation reference signal.