Section: 5.4.2A PUCCH format 3
Content: The block of bits shall be scrambled with a UE-specific scrambling sequence, resulting in a block of scrambled bits according to where the scrambling sequence is given by clause 7.2. The scrambling sequence generator shall be initialised with at the start of each subframe where is the C-RNTI. The block of scrambled bits shall be QPSK modulated as described in Clause 7.1, resulting in a block of complex-valued modulation symbols where . The complex-valued symbols shall be block-wise spread with the orthogonal sequences and resulting in sets of values each according to where for both slots in a subframe using normal PUCCH format 3 and , holds for the first and second slot, respectively, in a subframe using shortened PUCCH format 3. The orthogonal sequences and are given by Table 5.4.2A-1. Resources used for transmission of PUCCH format 3 are identified by a resource index from which the quantities and are derived according to Each set of complex-valued symbols shall be cyclically shifted according to where is given by Clause 5.4, is the slot number within a radio frame and is the SC-FDMA symbol number within a slot. The shifted sets of complex-valued symbols shall be transform precoded according to where is the number of antenna ports used for PUCCH transmission, resulting in a block of complex-valued symbols . Table 5.4.2A-1: The orthogonal sequence