1. A WLAN (Wireless Local Area Network) transmitter comprising: a transmission section configured to generate signals to be transmitted; and a control section connected to said transmission section to control said transmission section dependent on at least two transmission parameters, said control section comprising a state transition controller configured to step through a plurality of predefined control states, wherein said control section is configured to apply different transmission parameter modification mechanisms in different control states, and wherein said state transition controller is configured to determine the respective next control states based on transmission success and failure statistics.