COMMUNICATION DEVICE AND COMMUNICATION METHOD

摘要

In MIMO communication, a communication device is provided that transmits a transfer rate request signal while reducing it and reducing the interference and power consumption when the transfer rate request signal is transmitted substantially without lowering the transmission efficiency. A modulation encoding unit encodes and modulates transmission data transmitted to a communication partner and the transfer rate request signal is the plurality of transmission antennas. A transmission unit and a transmission antenna transmit a signal from the modulation encoding unit. A transmission control unit controls transmission of a signal transmitted from the transmission antenna and transmits a transfer rate request signal of one transmission antenna via the transmission antenna according to a comparison result between a difference of the transfer rate request signal in the respective transmission antenna of the communication partner and a predetermined value.

主权项

1. A user equipment comprising:
a receiver, which, in operation, receives a plurality of data respectively transmitted from a plurality of outputs of a base station; generation circuitry, which, in operation, generates at least one Channel Quality Indicator (CQI) calculated for the received plurality of data, and generates information indicating a number; modulating and encoding circuitry, which, in operation, modulates and encodes the at least one CQI and the information indicating a number; and a transmitter, which, in operation, transmits to the base station transmission data including the modulated and encoded CQI(s) and the modulated and encoded information indicating a number, the modulated and encoded information indicating a number corresponding to a number of CQI(s) included in the transmission data.