Noise-limited performance of spectral-amplitude-coding optical CDMA in fibre-optic radio highway networks

2005 ◽  
Vol 152 (5) ◽  
pp. 269-273 ◽  
Author(s):  
T. Demeechai
Keyword(s):  
Optical Cdma ◽  
Spectral Amplitude ◽  
Fibre Optic ◽  
Highway Networks ◽  
Spectral Amplitude Coding

Unified KS-Code

2009 ◽  
pp. 1473-1479 ◽  
Author(s):  
M. K.A. Abdullah ◽  
S. A. Aljunid ◽  
M. D.A. Samad ◽  
S. B.A. Anas ◽  
R. K.Z. Sahbudin
Keyword(s):  
Multiple Access ◽  
Direct Detection ◽  
Multiple Access Interference ◽  
Optical Cdma ◽  
Spectral Amplitude ◽  
Service Guarantees ◽  
Narrow Bandwidth ◽  
Network Topologies ◽  
Spectral Amplitude Coding ◽  
Code Division Multiple

Many codes have been proposed for optical CDMA system as discussed in Svetislav, Mari, Zoran, Kosti, and Titlebaum (1993), Salehi (1989), Liu and Tsao (2002), Maric, Moreno, and Corrada (1996), Wei and Ghafouri-Shiraz (2002), and Prucnal, Santoro, and Ting (1986). Optical code division multiple access (OCDMA) has been recognized as one of the most important technologies for supporting many users in shared media simultaneous, and in some cases can increase the transmission capacity of an optical fiber. OCDMA is an exciting developments in short haul optical networking because it can support both wide and narrow bandwidth applications on the same network, it connects large number of asynchronous users with low latency and jitter, and permits quality of service guarantees to be managed at the physical layer, offers robust signal security and has simplified network topologies. However, for improperly designed codes, the maximum number of simultaneous users and the performance of the system can be seriously limited by the multiple access interference (MAI) or crosstalk from other users. Another issue in OCDMA is how the coding is implemented. The beginning idea of OCDMA was restricted in time domain, in which the encoding/decoding could not been fully utilized in optical domain. Therefore a new coding in OCDMA has been introduced based on spectral encoding (Kavehrad & Zaccarin, 1995; Pearce & Aazhang, 1994; Smith, Blaikie, & Taylor, 1998; Wei & Ghafouri-Shiraz, 2002). The system, called Optical Spectrum CDMA, or OS-CDMA, has the advantage of using inexpensive optical sources, and simple direct detection receivers. In this article with an emphasis on the Spectral Amplitude Coding scheme, a new code known as Khazani-Syed (KS) code is introduced.

A Kind of Large-capacity Codes for AWG-based Spectral-amplitude-coding Optical CDMA System

2005 ◽  
Vol 26 (2) ◽  
Author(s):  
Yu Xin ◽  
Chongxiu Yu ◽  
Qiang Wu ◽  
Wenxiao Zheng ◽  
Zhuo Chen
Keyword(s):  
Optical Cdma ◽  
Spectral Amplitude ◽  
Cdma System ◽  
Large Capacity ◽  
Spectral Amplitude Coding

scholarly journals A New Family of Optical Code Sequences for Spectral-Amplitude-Coding Optical CDMA Systems

2004 ◽  
Vol 16 (10) ◽  
pp. 2383-2385 ◽  
Author(s):  
S.A. Aljunid ◽  
M. Ismail ◽  
A.R. Ramli ◽  
B.M. Ali ◽  
M.K. Abdullah
Keyword(s):  
Optical Cdma ◽  
Spectral Amplitude ◽  
New Family ◽  
Cdma Systems ◽  
Spectral Amplitude Coding
Sign in / Sign up

Export Citation Format

Share Document