Title :
A new family of optical code sequences for spectral-amplitude-coding optical CDMA systems
Author :
Aljunid, S.A. ; Ismail, M. ; Ramli, A.R. ; Ali, Borhanuddin M. ; Abdullah, Mohamad Khazani
Author_Institution :
Dept. of Comput. Syst. & Commun., Univ. Putra Malaysia, Serdang, Malaysia
Abstract :
A new code structure for spectral-amplitude-coding optical code-division multiple-access system based on double-weight (DW) code families is proposed. The DW code has a fixed weight of two. By using a mapping technique, codes that have a larger number of weights can be developed. Modified double-weight (MDW) code is a DW code family variation that has variable weights of greater than two. The newly proposed code possesses ideal cross-correlation properties and exists for every natural number n. Based on theoretical analysis and simulation, MDW code is shown here to provide a much better performance compared to Hadamard and modified frequency-hopping codes.
Keywords :
Hadamard codes; code division multiple access; code division multiplexing; sequences; sequential codes; Hadamard code; MDW code; cross-correlation; mapping; modified double-weight code; modified frequency-hopping code; optical code sequences; optical code-division multiple-access system; spectral-amplitude-coding optical CDMA system; Bandwidth; Error correction; Error correction codes; Frequency; Multiaccess communication; Optical filters; Optical modulation; Optical receivers; Performance analysis; Signal to noise ratio;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.833859
