The invention refers to a communication system (1) comprising a plurality of transmitters (2) and a receiving unit (3). The transmitters (2) are configured to divide signals to be emitted into K part signals and to emit the K part signals using K sub-carriers (20). K is an integer. The K sub-carriers (20) are frequency bands having a sub-carrier bandwidth (BW K ) and are spaced in frequency. The receiving unit (3) is configured to receive signals emitted by the transmitters (2). The invention further refers to a transmitter (2).