RADIO COMMUNICATION DEVICE, CHANNEL ESTIMATION METHOD AND SIGNAL RELAY METHOD

摘要

PROBLEM TO BE SOLVED: To achieve efficient signaling for estimating a round-trip channel matrix in a radio communication device such as a base station.SOLUTION: A radio communication device in a TDD (time division duplex) system includes: a notification unit for providing a notification of information indicative of a signal to be relayed by a communication destination radio communication device and a resource when the communication destination radio communication device relays the signal; a transmitter unit for transmitting the signal to be relayed by the communication destination radio communication device; a receiver unit for receiving the signal relayed by the communication destination radio communication device; and a channel estimation unit for performing channel estimation on the basis of the signal relayed by the communication destination radio communication device.