Apparatus, method and computer program for transmit precoding

摘要

Embodiments relate to a concept for precoding a transmit signal ( s i ) in a wireless communication system (200), the wireless communication system comprising a transmitter cluster (210) comprising a first transmitter (212- i ) and at least a second transmitter (212- j ), wherein the first transmitter (212- i ) communicates with a first receiver (214- i ) and the second transmitter (212- j ) communicates with a second receiver (214- j ). It is determined a first transmit precoding information (253) based on interference experienced at the second receiver (214- j ) due to interfering signal transmissions from at least the first transmitter (212- i ) of the transmitter cluster (210) and from transmitters (216) of the wireless communication system (200) outside the transmitter cluster (210). It is further determined a second transmit precoding information (255) based on a cross-channel state information of a wireless communications channel between the second receiver (214- j ) and the first transmitter (212- i ). A signal ( s i ) transmitted from the first transmitter (212- i ) to the first receiver (214- i ) is precoded based on the determined first and second transmit precoding information (253; 255).