Title :
Hybrid wavelength-division-multiplexing/spectral-amplitude-coding optical CDMA system
Author_Institution :
Dept. of Electron. Eng., Kun Shan Univ. of Technol., Tainan, Taiwan
fDate :
6/1/2005 12:00:00 AM
Abstract :
One spectral-amplitude-coding (SAC) scheme combined with wavelength-division-multiplexing (WDM) is proposed for optical code-division multiple-access systems. The supported code length is more flexible than the previous SAC codes and the corresponding encoder-decoder requires less fiber gratings, thus, the system becomes cheap and simple. As compared to the conventional SAC systems, this WDM/SAC system not only reserves the interference-cancellation property, but also has better performance against the effect of the phase-induced intensity noise arising in the photodetecting process. Thus, a larger number of active users can be supported under a given bit-error rate.
Keywords :
Bragg gratings; code division multiple access; code division multiplexing; decoding; encoding; error statistics; optical fibre communication; wavelength division multiplexing; WDM; bit-error rate; encoder-decoder; fiber gratings; hybrid wavelength-division-multiplexing; interference-cancellation property; interference-cancellation property noise; optical code-division multiple-access systems; photodetecting process; spectral-amplitude-coding optical CDMA system; Bragg gratings; Chaos; Couplers; Fiber gratings; Multiaccess communication; Multiple access interference; Optical fiber networks; Optical noise; Phase noise; Wavelength division multiplexing; Fiber Bragg gratings (FBGs); optical code-division multiple-access (OCDMA); spectral-amplitude coding (SAC); wavelength-division multiplexing (WDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.847447
