Method for achieving synchronization of transmit and receive units with multi-carrier signal transmission

A method for achieving synchronization between a transmit unit and at least one receive unit with multi-carrier signal transmission via a transmit channel, a large number of carrier frequencies being used for a signal transmission with multi-carrier signal transmission, the method comprising:

• generating a synchronization symbol utilizing predefined carrier frequencies;
• modulating the generated synchronization symbol with a predefined synchronization sequence via the transmit unit to generate a synchronization signal;
• emitting the synchronization signal by the transmit unit with a predefinable repetition period, the emitted synchronization signal being utilized to transmit an item of transmit-specific status information;
• receiving a signal by the receive unit subsequent to transmission via the transmit channel, the received signal being formed by the synchronization signal emitted repeatedly with the predefinable repetition period;
• and
• detecting and evaluating the received signal via a detection algorithm via the receive unit, the detection algorithm determining a period of the received signal as an instant of synchronization instant at which the synchronization signal is almost certainly present;
• wherein for generation of the synchronization symbol in the frequency range, an amplitude of each of the carrier frequencies used is occupied by an identical value, and amplitudes of utilized carrier frequencies of the transmit channel are set to a value of zero;
• wherein a phase is determined for the carrier frequencies used in each case for the synchronization symbol based on a relationship in comprising one of:
• X
• k
• ⁡
• (
• i
• )
• =
• {
• e
• j
• *
• π
• *
• i
• 2
• ;
• i
• ≤
• n
• 2
• e
• j
• *
• π
• ⁡
• (
• n
• -
• i
• )
• 2
• ;
• i
• >
• n
• 2
• ⁢
• ⁢
• and
• ⁢
• ⁢
• X
• k
• ⁡
• (
• i
• )
• =
• {
• e
• j
• *
• n
• 2
• *
• ⌊
• 2
• ⁢
• i
• 2
• ⌋
• ;
• i
• ≤
• n
• 2
• e
• j
• *
• n
• 2
• *
• ⌊
• 2
• ⁢
• (
• n
• -
• i
• )
• 2
• ⌋
• ;
• i
• >
• n
• 2
• ,
• where Xk(i) designates a complex-valued signal vector for a respectively used carrier frequency with the index k, i designates a control variable which assumes the values 0 to n−1, and where n indicates a totality of the carrier frequencies used, e designates Euler's number and j an imaginary unit.