Open AccessModified decoding and detection scheme for spectral amplitude coding optical CDMA systems
Author(s) -
Chen FuJun,
Luo FengGuang,
Li Bin,
He Cheng
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.0290
Subject(s) - decoding methods , code division multiple access , coding (social sciences) , computer science , electronic engineering , scheme (mathematics) , amplitude , telecommunications , algorithm , physics , mathematics , optics , engineering , statistics , mathematical analysis
In this reported work, a modified decoding and detection scheme with dispersion compensation is investigated for spectral‐amplitude‐coding optical code division multiple access (SAC‐OCDMA) systems. For simultaneously decoding and compensating the chromatic dispersion of signals in the 40 km‐long standard single‐mode fibre transmission, based on reconstruction equivalent‐chirp method the array configuration of fibre Bragg grating (FBG) segments can be controlled with a quadratic dispersion of −680 ps/nm for an extra time delay. The traditional triple‐branch signal detection (TBSD) scheme is then modified and the principle of multiuser interference elimination is theoretically analysed. The simulated results show that, without adding a dispersion compensation device, the modified TBSD scheme adopting the FBG decoder can realise the decoding and detection function in SAC‐OCDMA.