RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD Russian patent published in 2014 - IPC H04B1/707 

FIELD: radio engineering, communication.

SUBSTANCE: when an Ack/Nack signal is transmitted from a user terminal to a base station in an uplink control channel using an Ack/Nack resource, the signal is code-multiplexed by using a code sequence containing an orthogonal sequence and a cyclic-shifted sequence and transmitted from a plurality of user terminals to the base station. When using an aggregation size indicating the number of control signals of the downlink control channel, if the aggregation size is greater than one, it is determined that no resource located at the right of the axis of the cyclic-shifted amount of the cyclic-shifted sequence in the same orthogonal code of the orthogonal sequence is used, and the Ack/Nack signal to which CDD is applied from a plurality of antennae is transmitted using a resource ACK #0 allocated to the own device and an unused resource ACK #1, which have the same orthogonal code, but different cyclic-shifted amounts.

EFFECT: invention enables to obtain the transmission diversity effect by applying a CDD while reducing inter-code interference when performing a code multiplexing.

24 cl, 14 dwg