The Winter School on Information Theory 2011 will take place in the spectacular city of Barcelona between the 14th and the 18th of March. Jointly organized by UPF (Universitat Pompeu Fabra) and by CTTC (Centre Tecnològic de Telecomunicacions de Catalunya), and officially sponsored by the IEEE Information Theory Society, the biennial winter school continues its tradition to provide opportunities for graduate students to meet, present their research, and get advice from distinguished professors in their areas. In addition to their function as instructors, the invited professors will also be giving special tutorials on selected topics.