@conference {ScagliolaICC2011, title = {A Dirty Paper Scheme for Hierarchical OFDM}, booktitle = {IEEE International Conference on Communications (ICC)}, year = {2011}, month = {June}, address = {Kioto, Japan}, keywords = {dirty paper, Hierarchical OFDM, watermarking}, author = {Scagliola, Michele and Fernando P{\'e}rez-Gonz{\'a}lez and Guccione, Pietro} }