BASE STATION, TERMINAL, COMMUNICATION SYSTEM, COMMUNICATION METHOD AND INTEGRATED CIRCUIT

摘要

There is provided a base station that communicates with a terminal by using a resource element constituted by a sub-carrier and an OFDM symbol. The base station includes an EPDCCH generator, a reference signal generator, and a transmitter. The EPDCCH generator generates an EPDCCH for notification of control information for a terminal. The reference signal generator generates a first demodulation reference signal or a second demodulation reference signal which is a demodulation reference signal associated with the EPDCCH and is enabled to be multiplexed between a plurality of antenna ports. The transmitter transmits the EPDCCH and transmits the first demodulation reference signal or the second demodulation reference signal selected based on a configuration for the terminal.