“…Table 2. Performance and complexity comparison between different multiplexing techniques and modulation formats at 40 Gb/s aggregation bit rate (Daikoku, Yoshikane, & Morita, 2005;Essiambre, Winzer, & Grosz, 2006;Jumpei et al, 2007;Leibrich, Serbay, Baumgart, Rosenkranz, & Schimmler, 24-28 September 2006;Martelli et al, 2008;Ohm & Freckmann, 2004) Advanced modulation formats such as QASK, QAM, QPSK, QDPSK and DB double channel capacity of optical network with requiring the same spectral band as TDM. However, they have complex and costly transmitter and receiver.…”