Transmitting apparatus and method for a digital telecommunication system

Abstract

A transmitting apparatus transmits signals in a digital telecommunication system and a synchronising method is used for synchronizing such signals at a receiving apparatus. The transmitting apparatus prepares for transmission of a reference symbol having at least two repetition patterns, whereby one of the at least two repetition patterns is phase-shifted in relation to the other repetition pattern, and a synchronizing mechanism in the digital telecommunication system uses the reference symbol once received for synchronization. The synchronizing mechanism uses a cross-correlation mechanism to cross-correlate at least one of the two repetition patterns within a correlation window having a predetermined length.

1 . (canceled) 
     
     
         2 . A receiver comprising:
 circuitry configured to
 receive a reference symbol comprising at least nine synchronization repetition patterns, wherein each repetition pattern contains a predetermined number of samples and an end synchronization repetition pattern in the reference symbol is phase-shifted by 180°. 
   
     
     
         3 . The receiver of  claim 2 , wherein
 the circuitry is configured to perform a synchronization process by detecting a timing of a correlation peak at an end of the reference symbol.   
     
     
         4 . A method for receiving a digital signal in a digital telecommunication system, comprising:
 receiving a reference symbol comprising at least nine synchronization repetition patterns, wherein each repetition pattern contains a predetermined number of samples and an end synchronization repetition pattern in the reference symbol is phase-shifted by 180°.   
     
     
         5 . The method of  claim 4 , further comprising:
 performing a synchronization process by detecting a timing of a correlation peak at an end of the reference symbol.   
     
     
         6 . A receiver comprising:
 circuitry configured to receive a reference symbol comprising at least nine successive synchronization repetition patterns, wherein each repetition pattern contains a predetermined number of samples and a last repetition pattern of the successive repetition patterns is phase-shifted in relation to the other repetition patterns.   
     
     
         7 . The receiver of  claim 6 , wherein
 the last repetition pattern of the successive repetition patterns is phase-shifted by 180° in relation to the other repetition patterns.   
     
     
         8 . The transmitter device according to  claim 6 , wherein
 the circuitry is configured to perform a synchronization process by detecting a timing of a correlation peak at an end of the reference symbol.   
     
     
         9 . A method for receiving OFDM signals in an OFDM system, comprising:
 receiving a reference symbol comprising at least nine successive synchronization repetition patterns, wherein each repetition pattern contains a predetermined number of samples and a last repetition pattern of the successive repetition patterns is phase-shifted in relation to the other repetition patterns.   
     
     
         10 . The method according to  claim 9 , wherein
 the last repetition pattern of the successive repetition patterns is phase-shifted by 180° in relation to the other repetition patterns.   
     
     
         11 . The method according to  claim 9 , further comprising:
 performing a synchronization process by detecting a timing of a correlation peak at an end of the reference symbol.