Cross layer design of multimedia transmission over cognitive radio UWB multiband OFDM system / by Norazizah M.Aripin, author, Rozeha A. Rashid, 1968-, author, Norulhusna Ahmad, author, Aida Elrasheed Merghani Hamzah, 1965-, author, Norsheila Fisal, author, Sharifah Kamilah Syed Yusof, author, International Graduate Conference on Engineering and Science (2008: Johor Bahru)