A Dirty Paper Scheme for Hierarchical OFDM

Michele Scagliola, Fernando Perez-Gonzalez, Pietro Guccione
2011 2011 IEEE International Conference on Communications (ICC)  
A novel approach is here presented to embed a low-priority data stream into a high-priority data stream for OFDM wireless communications. The main improvement with respect to conventional hierarchical modulations is that the lowpriority data stream can be decoded from the received subcarrier symbols without any previous equalization in case of multipath fading channel. As a consequence, the expected performance is independent of the channel estimation method used to equalize the channel. The
more » ... -priority signal is superimposed on the highpriority symbols using a dirty paper coding technique. As a result of the analysis of the proposed method, several improvements to reduce the interference on the high-priority symbols are introduced. The performance of our scheme has been compared with that of a conventional hierarchical modulation using DVB-T system parameters, showing a considerable improvement for multipath fading channels.
doi:10.1109/icc.2011.5962763 dblp:conf/icc/ScagliolaPG11 fatcat:2uf2gthm6rgm7cyby6agyktlxi