FIELD: radio engineering, communication.
SUBSTANCE: transmitter, receiver, and methods therein, configured to transmit the first type of synchronisation signal in M1 symbols li, 0≤i≤(M1-1) and the second type of synchronisation signal in M2 symbols kj, 0≤j≤(M2-1) of the subframe (200), where M2≥M1≥2. The transmitter comprises a processor configured to determine, in which symbols li the synchronisation signal of the first type must be transmitted, and further configured to calculate, in which symbols kj the synchronisation signal of the second type must be transmitted, by placing each of M2 symbols kj at one or more specified symbolic distances from the associated symbol li, wherein the said one or more determined symbol distance between each of M2 symbols kj and the associated symbol li is equal for all of M1 symbols li in the subframe. The transmitter may also comprise a transmitter circuit configured to transmit the first type of synchronisation signals to M1 symbols li, and to transmit the synchronisation signals of the second type in the computed M2 symbols kj.
EFFECT: improving the synchronisation performance between the transmitter and the receiver.
23 cl, 22 dwg
