Continuous-band OFDM System for High-Speed Optical Transmission
Project Award Date: 07-15-2008
Orthogonal frequency-domain multiplexing (OFDM) has been applied to optical transmission systems to increase the optical bandwidth efficiency and improve the tolerance to performance degradation effects such as chromatic dispersion and polarization mode dispersion. Instead of using analog oscillators and mixers, OFDM transmitters and receivers heavily rely on high-speed digital signal processing and A/D-D/A conversion. OFDM systems operation at 20 Gb/s has been demonstrated and further increasing the data rate depends on advances in high-speed D/A conversion electronics. ITTC researchers will investigate a novel coherent band-combining technique to enhance the capability of OFDM systems. This may potentially allow a much higher transmission data rate than current systems provide. It will also make the transmission data rate flexible without sacrificing the bandwidth efficiency.
Primary Sponsor(s): Nortel Networks