Method and apparatus for coarse and fine frequency and timing synchronisation

System (60) comprising a processor (61) and a receiver (1) for receiving frequency signals, which receiver (1) comprises

• a processing stage (10) for converting the frequency signals into baseband signals comprising preamble symbols (SP,LP) and data symbols (D1,D2) and for processing the baseband signals;
• and
• a synchronisation stage (20) for synchronising the processing stage (10) and comprising a first part (23) for performing a coarse time synchronisation through autocorrelating samples of a group of preamble symbols (t1,t2,t3) and comprising a second part (24) for performing a fine time synchronisation through crosscorrelating samples of a further group of preamble symbols (t10,G1) with predefined samples.

Synchronisation stage (20) for use in a receiver (1) for receiving frequency signals, which receiver (1) comprises

• a processing stage (10) for converting the frequency signals into baseband signals comprising preamble symbols (SP,LP) and data symbols (D1,D2) and for processing the baseband signals;
• and
• the synchronisation stage (20) for synchronising the processing stage (10) and comprising a first part (23) for performing a coarse time synchronisation through autocorrelating samples of a group of preamble symbols (t1,t2,t3) and comprising a second part (24) for performing a fine time synchronisation through crosscorrelating samples of a further group of preamble symbols (t10,G1) with predefined samples.

Method for receiving frequency signals, which method comprises the steps of

• converting the frequency signals into baseband signals comprising preamble symbols (SP,LP) and data symbols (D1,D2) and processing the baseband signals;
• and
• synchronising the converting and/or the processing via performing a coarse time synchronisation through autocorrelating samples of a group of preamble symbols (t1,t2,t3) and via performing a fine time synchronisation through crosscorrelating samples of a further group of preamble symbols (t10,G1) with predefined samples.

Processor program product for receiving frequency signals, which processor program product comprises the functions of

• converting the frequency signals into baseband signals comprising preamble symbols (SP,LP) and data symbols (D1,D2) and processing the baseband signals;
• and
• synchronising the converting and/or the processing via performing a coarse time synchronisation through autocorrelating samples of a group of preamble symbols (t1,t2,t3) and via performing a fine time synchronisation through crosscorrelating samples of a further group of preamble symbols (t10,G1) with predefined samples.