Patent ID: 7965760
Filing Date: 2011-06-21
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A radio communication apparatus comprising: a spreading unit configured to spread an ACK/NACK signal or a CQI signal with a sequence defined by one of a plurality of cyclic shift values; and a transmitting unit configured to transmit the ACK/NACK signal or the CQI signal; wherein said spreading unit, in each symbol that forms the ACK/NACK signal or the CQI signal, uses one of first cyclic shift values, which form a portion of the plurality of the cyclic shift values and which are adjacent to each other, for the ACK/NACK signal, and uses one of second cyclic shift values, which are not within the portion of the plurality of the cyclic shift values, for the CQI signal, and a cyclic shift value between the first cyclic shift values and the second cyclic shift values is not used for either the ACK/NACK signal or the CQI signal.