Cell search procedure using primary synchronization signals (PSS) and secondary synchronization signals (SSS) in a wireless communication system

A method for establishing a duplex connection for data transmission between a plurality of transmission units each having a transmitter and a receiver, the duplex connection including a plurality of oppositely directed, unidirectional transmission channels, via which a respective communications link for data transmission between a respective transmitter and a respective receiver of the plurality of transmission units is established, the method comprising:

• emitting, by the transmitters of the plurality of transmission units, independently and in a periodically repeated manner, a first synchronization signal respectively during a synchronization phase;
• instructing a transmitter belonging to the same transmission unit as the receiver respectively to emit at least one time a second synchronization signal respectively following detection and synchronization with the respective first synchronization signal by the respective receiver;
• deriving the second synchronization signal respectively from the first synchronization signal of the respective transmitter of the respective transmission unit by changing at least one of an amplitude of the first synchronization signal and a polarity of the first synchronization signal;
• and
• implementing a changeover to data transmission following at least one-time detection of the second synchronization signal respectively by the receivers of the plurality of transmission units.