Integrated circuit for response signal spreading

摘要: A radio communication apparatus receives control information on one or more channel elements (CCEs) with consecutive CCE number(s). The first-spreads a response signal sequence defined by cyclic shift value that is determined among plurality of values from an index physical uplink (PUCCH), which associated first number the CCEs, and second-spreads first-spread orthogonal sequences index. One used for PUCCH, odd number, another same even number.