Terminal apparatus and base station apparatus

A base station apparatus comprising:

• a receiver configured to receive an SRS in an SRS resource;
• and
• a transmitter configured to transmit a PDCCH to which DCI is mapped, wherein
• the DCI indicates the SRS resource,
• the number of SRS ports for the SRS resource is eight,
• the eight SRS ports are mapped across S OFDM symbols,
• the number of repetitions R is configured for the SRS resource,
• the SRS resource includes N OFDM symbols,
• each of a first OFDM symbol set and a second OFDM symbol set includes S·R OFDM symbols,
• the N is divisible by the S·R,
• each of the eight SRS ports is mapped to a first subcarrier set in the first OFDM symbol set, and
• each of the eight SRS ports is mapped to a second subcarrier set in the second OFDM symbol set.

A communication method performed by a terminal apparatus, the communication method comprising:

• transmitting an SRS in an SRS resource;
• and
• receiving a PDCCH to which DCI is mapped, wherein
• the DCI indicates the SRS resource,
• the number of SRS ports for the SRS resource is eight,
• the eight SRS ports are mapped across S OFDM symbols,
• the number of repetitions R is configured for the SRS resource,
• the SRS resource includes N OFDM symbols,
• each of a first OFDM symbol set and a second OFDM symbol set includes S·R OFDM symbols,
• the N is divisible by the S·R,
• each of the eight SRS ports is mapped to the first subcarrier set in a first OFDM symbol set, and
• each of the eight SRS ports is mapped to the second subcarrier set in a second OFDM symbol set.