Title :
Performance analysis on transmission of M-QAM HDTV signals in FTTF network with EDFA
Author :
Wu, Jiunn-Shyen ; Wu, Jingshown ; Tsao, Hen-Wai
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
8/1/1995 12:00:00 AM
Abstract :
Transmission of 60 channels M-QAM HDTV signals in the CATV fiber-to-the-feeder (FTTF) network is investigated. The authors consider the 1550 nm system with the Er-doped fiber amplifiers (EDFA). They analyze the system performance by considering all noise terms, and nonlinear distortions from laser, fiber dispersion, EDFA gain tilt and chirping. The results show there exists the optimal optical modulation index for achieving the maximum fiber span under the required bit error rate. The 1550 nm system with EDFAs shows its benefits for the distribution of M-QAM HDTV signals in CATV networks. Using one DFB laser with 5 dBm output and one EDFA with 15 dBm saturation output power shared among 10 feeders, the maximum fiber span can be 32 km for 256-QAM signals and 58 km for 64-QAM signals
Keywords :
cable television; chirp modulation; distributed feedback lasers; erbium; fibre lasers; high definition television; laser beams; optical fibre dispersion; optical fibre subscriber loops; optical modulation; quadrature amplitude modulation; video signals; 1.55 mum; 256-QAM signals; 32 km; 58 km; 64-QAM signals; CATV; EDFA; Er-doped fiber amplifiers; FTTF network; M-QAM HDTV signals; bit error rate; chirping; fiber dispersion; fiber-to-the-feeder; gain tilt; maximum fiber span; noise terms; nonlinear distortions; optimal optical modulation index; performance analysis; saturation output power; Chirp; Erbium-doped fiber amplifier; Fiber lasers; HDTV; Laser noise; Nonlinear distortion; Optical noise; Performance analysis; Performance gain; System performance;
Journal_Title :
Consumer Electronics, IEEE Transactions on
