An arrangement are provided to transmit information between a transmitter and a receiver in a mobile system, the transmitter comprising a mapping unit configured to map bits of the information to be transmitted to channel symbols, and at least two transmitting antennas configured to transmit the channel symbols to a radio channel of the mobile system. The mobile system comprises a measuring unit configured to measure the status of the radio channel used for the transmission of information. The mapping unit of the transmitter is configured to map the bits to channel symbols using a mapping scheme that is dependent on the radio channel status measured by the measuring unit.