Paulo Silva received the Ph.D. degree from Instituto Superior Tecnico (IST), Technical University of Lisbon, Portugal, in 2010. He is a Professor at Universidade do Algarve. He was a researcher at CAPS/IST (Centro de Analise e Processamento de Sinais) from 1996 to 2005; from 2005 to 2008 he was researcher at ISR/IST (Instituto de Sistemas e Robotica); in 2009 he joined the research center IT (Instituto de Telecomicacoes). He has been involved in several research projects in the broadband wireless communications area and is the author of several dozens of papers. His main research interests include spread spectrum and equalization techniques. Rui Dinis received the Ph.D. degree from Instituto Superior Tecnico (IST), Technical University of Lisbon, Portugal, in 2001. From 2001 to 2008 he was a Professor at IST. Since 2008 he is teaching at FCT-UNL (Faculdade de Ciencias e Tecnologia da Universidade Nova de Lisboa). He was a researcher at CAPS/IST (Centro de Analise e Processamento de Sinais) from 1992 to 2005; from 2005 to 2008 he was researcher at ISR/IST (Instituto de Sistemas e Robotica); in 2009 he joined the research center IT (Instituto de Telecomicacoes). He has been involved in several research projects in the broadband wireless communications area and he is the author/co-author of over 200 papers published in major international conferences or journals. His main research interests include modulation, equalization and channel coding.