Method and circuit for the mapping of data to subcarriers

Tone ordering circuit ( 100 ) includes a parallel-serial conversion circuit ( 10 ), a bit table ( 11 ), a pointer circuit ( 12 ), a carrier counter circuit ( 13 ), a comparator ( 14 ), and a serial-parallel conversion circuit ( 15 ). Tone ordering circuit ( 100 ) receives baseband data and provides tone ordering data, which have a width in accordance with a corresponding carriers. Bit widths and carriers may be arranged in ascending order. Bit table ( 11 ) stores a point at which a bit width of tone ordering data may be changed. In this way, bit widths corresponding to all tone ordering numbers need not be stored in a bit table ( 11 ) and the density of a bit table ( 11 ) may be reduced. By accessing bit table ( 11 ), a control circuit (pointer circuit ( 12 ), carrier counter circuit ( 13 ), and comparator ( 14 )) provide a bit width number to a serial-parallel conversion circuit ( 15 ) to provide tone ordering data according to a desired bit width.