Section: 6.11.2.1 Sequence generation
Content: The sequence used for the second synchronization signal is an interleaved concatenation of two length-31 binary sequences. The concatenated sequence is scrambled with a scrambling sequence given by the primary synchronization signal. The combination of two length-31 sequences defining the secondary synchronization signal differs between subframes according to where . The indices and are derived from the physical-layer cell-identity group according to where the output of the above expression is listed in Table 6.11.2.1-1. The two sequences and are defined as two different cyclic shifts of the m-sequence according to where, , is defined by with initial conditions. The two scrambling sequences and depend on the primary synchronization signal and are defined by two different cyclic shifts of the m-sequence according to where is the physical-layer identity within the physical-layer cell identity group and , , is defined by with initial conditions . The scrambling sequences and are defined by a cyclic shift of the m-sequence according to where and are obtained from Table 6.11.2.1-1 and , , is defined by with initial conditions . Table 6.11.2.1-1: Mapping between physical-layer cell-identity group and the indices and