Now showing items 1-11 of 11

    • Cardinality enhancement of spectral/spatial modified double weight code optical code division multi-Access system by PIIN suppression 

      Amir Razif Arief, Jamil Abdullah, Dr.; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Anuar, Mat Safar, Ir. Dr.; Junita, Mohd Nordin; R. Badlishah, Ahmad, Prof. Dr. (Elsevier GmbH, 2013-10)
      A new two-dimensional (2-D) optical code division multiple access (OCDMA) scheme to increase the achievable system capacity is proposed. The code exhibits good cross-correlation property time and wavelength shift. Performances ...
    • Comparison between Conventional OCDMA and Subcarrier Multiplexing SAC OCDMA System Based on Single Photodiode Detection 

      Nur Amirah Amni, Ahmad; Junita, Mohd Nordin; Syed Alwee Aljunid, Syed Junid; Mohd Rashidi, Che Beson; Rosdisham, Endut (EDP Sciences, 2017)
      This paper demonstrates the comparison between conventional OCDMA system and subcarrier multiplexing (SCM) SAC-OCDMA system by applying Recursive Combinatorial (RC) code based on single photodiode detection (SPD). SPD is ...
    • Impact of multi-diagonal code on high-speed spectral amplitude coding optical code division multiple-access networks 

      Thanaa Hussein, Abd.; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Hilal Adnan, Fadhil, Dr.; Junita, Mohd Nordin; Mohamad Naufal, Mohamad Saad, Assoc. Prof. (Springer-Verlag, 2013-09)
      In this paper, we present the impact of the multi-diagonal (MD) code for high data rate in spectral amplitude coding optical code division multiple-access (SAC-OCDMA) networks. An MD code structure for SAC-OCDMA system is ...
    • Improving bit error rate of OCDMA systems using and subtraction technique 

      Syed Alwee Aljunid, Syed Junid; Shariffah Zarihan, Syed Zaharim Helmi; Anuar, Mat Safar; Junita, Mohd Nordin; Norsuhaida, Ahmad; Samad, M.D.A.; Mohamad Khazani, Abdullah (Institute of Electrical and Electronics Engineering (IEEE), 2006)
      A new detection scheme, namely AND subtraction technique is proposed and presented in this paper. The theory is being elaborated and experimental results have been done by comparing Double-Weight (DW) code against the ...
    • Influence of Code Size Variation on the Performance of 2D Hybrid ZCC/MD in OCDMA System 

      Rima, Matem; Syed Alwee Aljunid, Syed Junid; Junita, Mohd Nordin; Mohd Rashidi, Che Beson; Israa, Shihab Ahmed (EDP Sciences, 2018)
      Several two dimensional OCDMA have been developed in order to overcome many problems in optical network, enhancing cardinality, suppress Multiple Access Interference (MAI) and mitigate Phase Induced Intensity Noise (PIIN). ...
    • Minimizing correlation effect using zero cross correlation code in spectral amplitude coding optical code division multiple access 

      Anuar, Mat Safar, Ir. Dr.; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Amir Razif Arief, Jamil Abdullah, Dr.; Junita, Mohd Nordin; Mohamad Naufal, Mohamad Saad, Assoc. Prof. (The Optical Society of Japan, 2012-01)
      The use of minimal multiple access interference (MAI) in code design is investigated. Applying a projection and mapping techniques, a code that has a zero cross correlation (ZCC) between users in optical code division ...
    • Modelling and simulation of a 1.6 Tb/s optical system based on multi-diagonal code and optical code-division multiple-access 

      Thanaa Hussein, Abd.; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Hilal Adnan, Fadhil, Dr.; Junita, Mohd Nordin; Mohamad Naufal, Mohamad Saad, Prof. Madya Dr. (Institute of Physical Optics, 2012)
      n this paper we have modelled and simulated a 1.6 Tb/s (100×16 Gb/s) optical system based on spectral amplitude coding for the optical code-division multiple- access (SAC-OCDMA) scheme. In order to reduce the effect of ...
    • Performance evaluation of Fi-Wi network based on SCM-optical code division multiple access architecture 

      Junita, Mohd Nordin; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Rosemizi, Abd. Rahim; Anuar, Mat Safar, Ir. Dr.; Amir Razif Arief, Jamil Abdullah, Dr.; R. Badlishah, Ahmad, Prof. Dr.; Mohamad Naufal, Mohamad Saad (Elsevier GmbH, 2013-10)
      This paper investigates the performance of a spectral amplitude coding (SAC)-OCDMA system design utilizing subcarrier multiplexing techniques for use in the popular fiber-wireless (Fi-Wi) technology. Zero cross correlation ...
    • PIN versus Avalanche photodiode gain optimization in zero cross correlation optical code division multiple access system 

      Anuar, Mat Safar, Ir. Dr.; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Amir Razif Arief, Jamil Abdullah; Junita, Mohd Nordin; Mohamad Naufal, Mohamad Saad, Assoc. Prof. Dr. (Elsevier GmbH, 2013-02)
      In this paper, we show details of zero cross correlation (ZCC) code development and investigate performance by measuring bit-error-rates compared to other optical code division multiple access (OCDMA) codes using Avalanche ...
    • Realization of wavelength-time modified double weigs-button-field 

      Amir Razif Arief, Jamil Abdullah, Dr.; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Anuar, Mat Safar, Ir. Dr.; R. Badlishah, Ahmad, Prof. Dr.; Junita, Mohd Nordin; Mohd Rashidi, Che Beson (Trans Tech Publications, 2014)
      Explosive growth of bandwidth demand together with advance in latest communication services and emerging applications have inspired interest in optical code division multiple access (OCDMA). The work focuses on analysis ...
    • Study of rain attenuation consequence in free space optic transmission 

      Rahman, A. K.; Anuar, Mat Safar; Syed Alwee Aljunid, Syed Junid; Junita, Mohd Nordin (Institute of Electrical and Electronics Engineering (IEEE), 2008)
      This paper is to provide the preliminary result and activities of a research program at UNIMAP on rain attenuation in the Perlis region. The project uses the LaserBit product; model LB- 2500 and LB-5000 which can maximum ...