Kazuhiro Uehara, Maria-Gabriella Di Benedetto, Akihiro Okazaki, Hitoshi Yoshino: 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011, Osaka, Japan, June 1-3, 2011. ICST / IEEE 2011, ISBN 978-1-936968-19-0