Apparatus and method realizing a cognitive enabler for unlicensed band communication using licensed feedback in multi-band radio channels

An apparatus (100) for receiving data is provided. The apparatus (100) comprises a data receiver (110) for receiving the data, wherein the data is transmitted in a first channel by a first transmission. Moreover, the apparatus (100) comprises a transmit information transmitter (120) for transmitting transmission information in a second channel by a second transmission. The transmission information is control information depending on the first transmission, or the transmission information is channel quality information indicating a channel quality of the first channel. The second channel is different from the first channel. Moreover, an apparatus for transmitting data and a system are provided.