Title :
Optimum signal constellation design for ultra-high-speed optical transport networks
Author :
Djordjevic, Ivan B. ; Liu, Tao ; Cvijetic, Milorad
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Arizona, Tucson, AZ, USA
Abstract :
In this invited paper we analyze several strategies that can be used facilitate the implementation of 400 GbE and 1 TbE technologies with respect to signal-constellation design and propose the use of optimum signal constellations instead of conventional QAM scheme. The proposed signal constellation designs can be used in combination with large-girth LDPC codes to solve both the bandwidth and energy-efficiency problems of future Ethernet technologies. We further describe several hybrid coded-modulation (CM) schemes that enable multi-terabit serial optical transport, including energy-efficient D-dimensional CM, mode-multiplexed four dimensional CM, and mode-multiplexed generalized-OFDM.
Keywords :
modulation coding; optical fibre LAN; optical modulation; parity check codes; quadrature amplitude modulation; Ethernet technology; QAM scheme; bit rate 1 Tbit/s; bit rate 400 Gbit/s; energy-efficiency problems; energy-efficient D-dimensional CM scheme; hybrid coded-modulation schemes; large-girth LDPC codes; mode-multiplexed four dimensional CM scheme; mode-multiplexed generalized-OFDM; multiterabit serial optical transport network; optimum signal constellation design; ultrahigh-speed optical transport networks; Algorithm design and analysis; Constellation diagram; Energy efficiency; Integrated optics; Parity check codes; Quadrature amplitude modulation; Optical networks; coded-modulation; low-density parity-check (LDPC) codes; modulation; multiplexing; orbital angular momentum (OAM); signal constellation design;
Conference_Titel :
Transparent Optical Networks (ICTON), 2012 14th International Conference on
Conference_Location :
Coventry
Print_ISBN :
978-1-4673-2228-7
Electronic_ISBN :
2161-2056
DOI :
10.1109/ICTON.2012.6253865
