Open AccessPractical investigation of suitable decoding techniques for spectral amplitude coding optical code division multiple access‐based vibration sensing
Author(s) -
Taiwo Ambali,
Moghaddasi Majid,
Kuje Danjuma,
Idriss Yahaya,
Mokhtar Makhfudza
Publication year - 2016
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/iet-opt.2015.0125
Subject(s) - decoding methods , computer science , coding (social sciences) , code division multiple access , electronic engineering , vibration , multiplexing , list decoding , algorithm , engineering , telecommunications , acoustics , concatenated error correction code , mathematics , physics , statistics , block code
A suitable decoding technique for spectral amplitude coding optical code division multiple access (SAC‐OCDMA)‐based secured distributed vibration sensor is investigated. The study is carried out to identify the most appropriate techniques for receiving the transmitted vibration signal in SAC‐OCDMA‐based system. The techniques which are direct decoding, complementary and logical AND decoding are compared based on the level of crosstalk, number of components used and supported transmission distance in multiplexed vibration sensing using both simulation and experiment. The results show direct decoding capable of supporting 55 km unlike the other two which are 44 and 38 km, respectively. Aside that, direct decoding techniques could be implemented with less number of components and has optimal signal‐to‐noise ratio while still preventing the system again the ‘man in the middle’ attack.