Synchronization structure and method for a receiving apparatus of a communication system

A synchronization method for received signals in a communication system, in which the signals are transmitted in frames, each frame including a synchronization part with synchronization sequences, wherein at least one of the synchronization sequences has a different phase than the other synchronization sequences, the synchronization method comprising the steps of:

• performing a correlation on the synchronization part;
• detecting candidate correlation peaks in the correlation result only when the distance between adjacent peaks in the correlation result is equivalent to the length of a synchronization sequence or a multiple thereof;
• and
• detecting a correlation peak among said candidate correlation peaks based on a confidence value and phase information.

A synchronization structure for a receiving apparatus for receiving signals in a communication system, in which the signals are transmitted in frames, each frame including a synchronization part with synchronization sequences, wherein at least one of the synchronization sequences has a different phase than the other synchronization sequences, the synchronization structure comprising:

• a correlation unit configured to perform a correlation on the synchronization part;
• a peak detection unit configured to detect candidate correlation peaks in the correlation result;
• a correlation peak detection unit configured to detect a correlation peak among said candidate correlation peaks on the basis of a confidence value and phase information;
• a delay unit configured to delay the correlation result from the correlation unit by one synchronization sequence;
• an adding unit configured to add a negative version of the correlation result from the correlation unit and the delayed correlation result from the delay unit;
• and
• a combining unit configured to combine the delayed correlation result from the delay unit and the added correlation result from the adding unit and to supply the resulting combined correlation result to the peak detection unit.