Transmitter apparatus, receiver apparatus, transmission method, and notification method

摘要

This invention relates to a transmitter apparatus, a receiver apparatus, a transmission method and a notification method that, when a switching between MIMO communication and non-MIMO communication is performed, can suppress the increase of an SRS (Sounding Reference Signal) resource, while suppressing the degradation of trackability of temporal variation of a channel. In a terminal (200), a mapping unit (212) maps an SRS sequence, which is received from a pilot, generating unit (216), on the basis of information related to an SRS hopping pattern, received from a base station (100). For this SRS hopping pattern, the frequency of the SRS transmissions via a first one of a plurality of antennas of the terminal (200) is higher than that of the SRS transmissions via a second one of the plurality of antennas of the terminal (200).

主权项

1. A transmission apparatus that comprises a plurality of antennas and transmits a reference signal from each of the plurality of antennas, the transmission apparatus comprising:
a mapping section configured to map the reference signal to a time-frequency resource on the basis of a hopping pattern of the reference signal; and a transmission section configured to transmit the mapped reference signal, wherein in the hopping pattern, the number of transmissions of the reference signal from a first antenna out of the plurality of antennas is larger than the number of transmissions of the reference signal from a second antenna out of the plurality of antennas; and in the hopping pattern, both a transmission timing and a frequency position of the reference signal transmitted from the second antenna are matched with both a transmission timing and a frequency position of the reference signal transmitted from the first antenna.