Terminal apparatus, base station apparatus, communication method, and integrated circuit

A base station apparatus, comprising:

• a receiver configured to receive a time continuous signal for a first subcarrier in a first time symbol from a terminal apparatus;
• and
• a decoder configured to detect a first complex-valued symbol from the time continuous signal;
• wherein
• the time continuous signal is generated, by the terminal apparatus, based on at least the first complex-valued symbol to which a phase rotation is applied,
• the phase rotation is initialized for each transmission instance,
• the phase rotation is given based on at least a subcarrier index of the first subcarrier,
• the each transmission instance includes a plurality of time symbols, and
• the each transmission instance includes repeat transmissions of Narrow Band Physical Uplink Shared Channels (NPUSCHs).

A communication method used for a terminal apparatus, the method comprising;

• transmitting a time continuous signal for a first subcarrier in a first time symbol;
• and
• generating the time continuous signal based on at least a first complex-valued symbol to which a phase rotation is applied, and
• receiving a Narrowband Physical Downlink Control Channel (NPDCCH) including downlink control information indicating the subcarrier index of the subcarrier to which the time continuous signal corresponds;
• wherein the phase rotation is initialized for each transmission instance,
• the phase rotation is given based on at least a subcarrier index of the first subcarrier
• the each transmission instance includes a plurality of time symbols, and
• the each transmission instance includes repeat transmissions of Narrow Band Physical Uplink Shared Channels (NPUSCHs).

A communication method used for a base station apparatus, the method comprising:

• receiving a time continuous signal for a first subcarrier in a first time symbol from a terminal apparatus;
• and
• detecting a first complex-valued symbol from the time continuous signal;
• wherein
• the time continuous signal is generated, by the terminal apparatus, based on at least the first complex-valued symbol to which a phase rotation is applied,
• the phase rotation is initialized for each transmission instance,
• the phase rotation is given based on at least a subcarrier index of the first subcarrier,
• the each transmission instance includes a plurality of time symbols, and
• the each transmission instance includes repeat transmissions of Narrow Band Physical Uplink Shared Channels (NPUSCHs).