Browsing School of Computer and Communication Engineering (Articles) by Author "syedalwee@unimap.edu.my"

Now showing items 21-33 of 33

    • A new two-code keying scheme for SAC-OCDMA systems enabling bipolar encoding 

      Hamza M. R., Al-Khafaji, Dr.; Razali, Ngah, Assoc. Prof. Dr.; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Tharek, Abd. Rahman, Prof. Dr. (Taylor & Francis, 2014-03)
      In this paper, we propose a new two-code keying scheme for enabling bipolar encoding in a high-rate spectral-amplitude coding optical code-division multiple-access (SAC-OCDMA) system. The mathematical formulations are ...

    • Performance analysis of hybrid OCDMA/WDM system for metro area network 

      Nasim, Ahmed, Dr.; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; R. Badlishah, Ahmad, Prof. Dr.; Nizam Uddin, Ahamed; Matiur J., Rahman (Walter de Gruyter Berlin/Boston, 2014-03)
      In this study a hybrid spectral amplitude coding for optical code division multiple access (i.e., called OCDMA) over wavelength division multiplexing (WDM) network is proposed to support large number of subscribers. The ...

    • Performance analysis of wavelength multiplexed SAC OCDMA codes in beat noise mitigation in SAC OCDMA systems 

      Ahmed M., Alhassan; Nasreen, Badruddin, Dr.; Mohamad Naufal, Mohamad Saad; Syed Alwee Aljunid, Syed Junid, Prof. Dr. (European Optical Society, 2013-07)
      In this paper we investigate the use of wavelength multiplexed spectral amplitude coding (WM SAC) codes in beat noise mitigation in coherent source SAC OCDMA systems. A WM SAC code is a low weight SAC code, where the whole ...

    • Performance enhancement of OCDMA system using NAND detection with modified double weight (MDW) code for optical access network 

      Nasim, Ahmed; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Hilal Adnan, Fadhil, Dr.; R. Badlishah, Ahmad, Prof. Dr.; Mohd Abdur Rashid, Dr. (Elsevier GmbH, 2013-07)
      In this paper, we have extensively analyzed the OCDMA system performance using modified double weight (MDW) code with NAND detection technique as newly developed by the authors. In theoretical analysis, various noises and ...

    • 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 ...

    • Phase-induced intensity noise reduction with improved group velocity dispersion tolerance in SAC-OCDMA systems 

      Hamza Mohammed Ridha, Al-Khafaji; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Amphawan, Angela, Dr.; Hilal Adnan, Fadhil, Dr.; Anuar, Mat Safar, Ir. Dr. (Engg Journals Publications, 2013-02)
      The demand for efficient optical communication systems has fuelled considerable research in developing techniques for eradicating phase-induced intensity noise (PIIN) in spectral-amplitude coding optical code-division ...

    • 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 ...

    • Reducing BER of spectral-amplitude coding optical code-division multiple-access systems by single photodiode 

      Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Hamza Mohammed Ridha, Al-Khafaji; Amphawan, Angela, Dr.; Hilal Adnan, Fadhil, Dr.; Anuar, Mat Safar, Ir. Dr. (European Optical Society, 2013)
      In this paper, we present a single photodiode detection (SPD) technique for spectral-amplitude coding optical code-division multiple-access (SAC-OCDMA) systems. The proposed technique eliminates both phase-induced intensity ...

    • Reducing BER of spectral-amplitude coding optical code-division multiple-access systems by single photodiode detection technique 

      Hamza Mohammed Ridha, Al-Khafaji; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Amphawan, Angela, Dr.; Hilal Adnan, Fadhil, Dr.; Anuar, Mat Safar, Ir. Dr. (European Optical Society, 2013-03)
      In this paper, we present a single photodiode detection (SPD) technique for spectral-amplitude coding optical code-division multiple-access (SAC-OCDMA) systems. The proposed technique eliminates both phase-induced intensity ...

    • Smart prolong fuzzy wireless sensor-actor network for agricultural application 

      Naseer, Sabri; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; R. Badlishah, Ahmad, Prof. Dr.; Mohd Fareq, Abd Malek, Dr.; Abid, Yahya, Dr.; Rezuwan, Kamaruddin, Prof. Ir. Dr. Hj.; Muhammed Sabri, Salim (Institute of Information Science, 2012-03)
      The advances in pervasive communication, sensing and computing of wireless sensor networks technologies are leading to the emergence of wireless sensor-actor networks. The spreading merit of WSAN has led to increasing ...

    • SOA/SPD-based incoherent SAC-OCDMA system at 9×5gbps 

      Hamza Mohammed Ridha, Al-Khafaji; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Amphawan, Angela, Dr.; Hilal Adnan, Fadhil, Dr. (The Institute of Electronics, Information and Communication Engineers (IEICE), 2013-03)
      To boost the performance of spectral-amplitude coding optical code-division multiple-access (SAC-OCDMA) systems, the need for an effective solution to diminish phase-induced intensity noise (PIIN) is becoming progressively ...

    • Study of the OCDMA transmission characteristics in FSO-FTTH at various distances, outdoor 

      Muthana Y., Aldouri; Syed Alwee Aljunid, Syed Junid, Prof. Dr.; Hilal Adnan, Fadhil, Dr. (De Gruyter, 2013-06)
      It is important to apply the field Programmable Gate Array (FPGA), and Optical Switch technology as an encoder and decoder for Spectral Amplitude Coding Optical Code Division Multiple Access (SAC-OCDMA) Free Space Optic ...