User equipment for code group synchronization

A user equipment (UE) capable of receiving and transmitting communication signals in a time division duplex using code division multiple access format, the user equipment comprising:

• means for receiving a primary code synchronization signal, the primary code synchronization signal received in a selected time slot out of a plurality of time slots in a primary code synchronization channel;
• means for time synchronizing with a received timing of the primary code synchronization signal;
• means for identifying secondary synchronization signals, the secondary synchronization signals received along with the primary code synchronization signal;
• and
• means for determining an assigned code group and the selected time slot, based on the identified secondary synchronization signals;
• and
• wherein the assigned code group is out of a predetermined number N of possible code groups, each combination of the N code groups and the selected time slot out of the plurality of time slots is associated with a unique combination of secondary signals from a set of secondary signals which does not exceed (log2N)+1 in number.