User equipment, initial cell searching method and apparatus thereof

An initial cell searching apparatus, comprising:

• a receiving unit, configured to receive at least one frame data sequence including synchronization channel signals;
• a first calculating unit, configured to perform a correlation process between all synchronization sequences stored in a user equipment and the received at least one frame data sequence to obtain correlation sequences, and calculate correlation power sequences corresponding to each of the correlation sequences;
• a searching unit, configured to search a highest peak with a maximum power value and a secondary peak with a second maximum power value for each of the correlation power sequences, and record a power value of the highest peak and a corresponding position of the highest peak in a time domain and a power value of the secondary peak and a corresponding position of the secondary peak in the time domain for each of the correlation power sequences;
• and
• a detection unit, configured to determine a target cell ID based on a first target sequence if the first target sequence exists, wherein the first target sequence corresponds to a synchronization sequence corresponding to a correlation power sequence of which a relative distance between the corresponding position of the highest peak and the corresponding position of the secondary peak meets a predetermined condition, and the correlation power sequence has a maximum highest peak value among all the correlation power sequences which meet the predetermined condition;
• wherein the relative distance between the corresponding position of the highest peak and the corresponding position of the secondary peak meeting the predetermined condition comprises:
• an absolute difference between the relative distance between the corresponding position of the highest peak and the corresponding position of the secondary peak and a length of the synchronization sequence is less than a predetermined threshold.