Abstract: The present invention discloses an apparatus and method for adapting a transmission parameter in a transmitting node of a data communication system to the current link quality of a data communication channel. The adapted transmission parameter is selected by the transmitting node from a set of transmission parameters in dependence on a number of successful transmissions. The number of successful transmissions is compared in the transmitting node against one of a first threshold value corresponding to a first state of the transmitting node and a second threshold value corresponding to a second state of the transmitting node.

Abstract: Methods, systems and apparatus for multi-carrier transmission of data. An example of a method includes the steps of: providing a stream of data, encoding the stream of data to create a plurality of complex values, assigning each of the plurality of complex values to one of a plurality of sub-channels which form one of two or more channels, assigning a separate value to each of the plurality of sub-channels, multiplying each of the plurality of sub-channels with the assigned separate value to generate a multiplied value for each of the plurality of sub-channels, modulating the multiplied value of each of the plurality of sub-channels to a sub-carrier to generate a modulated signal for each of the two or more channels, and simultaneously transmitting the modulated signal of each of the two or more channels.