Coding for multicarrier digital radio systems

The authors investigate the performance of systems which combine the techniques of multicarrier transmission and block-coded modulation. Coding of the subchannels in multicarrier systems is made jointly, i.e. the codewords are formed by the symbols simultaneously transmitted on the different subchannels. With respect to separate encoding of the subchannels, this technique leads to significantly better performance in the presence of multipath fading and narrowband tone interference and adjacent channel interference. Simulations made using a multipath fading channel and tone interference confirmed that coding is significantly more effective than in single-carrier systems