Title :
32-channel digital optical CATV distribution system
Author :
Yamashita, Haruo ; Ohtsuka, Tomoyuki ; Kondou, Ryuichi ; Naito, Hidetoshi ; Taniguchi, Atsuki ; Yamaguchi, Kazuo
Author_Institution :
Fujitsu Lab. Ltd., Kawasaki, Japan
Abstract :
The authors discuss a digital optical CATV system with increased channels, focusing on its network configuration, WDM and TDM (wavelength and time division multiplexing) schemes, and its application to a 32-channel CATV distribution system. The key technologies for low-cost increased-channel CATV are discussed, and the economical number of TDM channels and the required interchannel isolation in the WDM demultiplexer are clarified. Bit-synchronized compensation for the propagation delay differences in WDM is proposed, as is a new multiplexing scheme suitable for low-power, compact TDM equipment. A compact 32-channel TDM and WDM video distribution system was designed based on a bus-star configuration and newly developed high-speed LSI technology. The transmission characteristics of the transmitter/receiver equipment developed for feeder loops were found to be good, and experimental results show that the proposed design with its versatile hardware will be a powerful tool for a low-cost multichannel digital optical CATV system
Keywords :
cable television; compensation; digital communication systems; frequency division multiplexing; multiplexing equipment; optical communication equipment; optical fibres; optical links; television networks; time division multiplexing; 1.8 Gbit/s; CATV distribution system; TDM channels; WDM demultiplexer; bit synchronised compensation; bus-star configuration; compact TDM equipment; digital optical transmission system; feeder loops; high-speed LSI technology; interchannel isolation; low cost multichannel system; network configuration; propagation delay; time division multiplexing; transmitter/receiver equipment; video distribution system; wavelength division multiplexing; High speed optical techniques; Isolation technology; Optical fiber networks; Optical receivers; Optical transmitters; Power generation economics; Propagation delay; Time division multiplexing; WDM networks; Wavelength division multiplexing;
Conference_Titel :
Global Telecommunications Conference and Exhibition 'Communications Technology for the 1990s and Beyond' (GLOBECOM), 1989. IEEE
Conference_Location :
Dallas, TX
DOI :
10.1109/GLOCOM.1989.64166
