Performance analysis of SAC-OCDMA in free space optical medium using MD and DDW code

Spectral amplitude coded Optical code division multiple access technique (SAC-OCDMA) has become a major area of research in optical communication. OCDMA allows multiple users to access a medium simultaneously without any contention. It has ability to operate asynchronously, provide privacy and security and to reduce multiple user interference. In this paper performance of SAC-OCDMA with Multi-diagonal (MD) code and Diagonal double weight (DDW) code with FSO communication system is presented and compared under different conditions of rain and haze. 10 simultaneous users with 5Gbps data are evaluated in the system. Effect of transmitted power and beam divergence is also studied. Results have been formulated based upon eye diagrams and values of Q- factor and BER. Simulation results show that DDW code outperforms MD code for longer distance under rain and haze conditions. DDW code is able to perform well at low input power.

[1]  Syed Alwee Aljunid,et al.  Optimization of free space optics parameters: An optimum solution for bad weather conditions , 2013 .

[2]  R. S. Fyath,et al.  Transmission Performance of Optical Code Division Multiple Access Network Based on Spectral Amplitude Coding , 2012 .

[3]  Murat Uysal,et al.  Survey on Free Space Optical Communication: A Communication Theory Perspective , 2014, IEEE Communications Surveys & Tutorials.

[4]  R. A. Rahim,et al.  Development and Performance of a New SAC Optical CDMA code with in-phase Cross Correlation , 2012 .

[5]  Vijay Kumar Banga,et al.  Performance analysis of Free Space Optics link at different data rates , 2014, 2014 International Conference on Contemporary Computing and Informatics (IC3I).

[6]  S. A. Aljunid,et al.  A novel encoding and decoding structure for SAC-OCDMA systems enabling high-rate transmission , 2014, 2014 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE).

[7]  Syed Alwee Aljunid,et al.  Development of a new code family based on SAC-OCDMA system with large cardinality for OCDMA network , 2011 .

[8]  Syed Alwee Aljunid,et al.  The Evolution of Double Weight Codes Family in Spectral Amplitude Coding OCDMA , 2015 .

[9]  Ali Y. Fattah,et al.  Spectral Efficiency Improvement of the Optical Communication Systems , 2014 .

[10]  S. A. Aljunid,et al.  Impact of attenuations on the hybrid Subcarrier Multiplexing SAC OCDMA-FSO system , 2013, 2013 IEEE Conference on Open Systems (ICOS).

[11]  Siti Barirah Ahmad Anas,et al.  Performance of SAC OCDMA-FSO communication systems , 2013 .

[12]  Abdulsalam Alkholidi,et al.  Free Space Optical Communications — Theory and Practices , 2014 .

[13]  Saleh Seyedzadeh,et al.  Optical Code Division Multiple Access Codes comparison in free space optics and optical fiber transmission medium , 2014, 2014 IEEE REGION 10 SYMPOSIUM.

[14]  M. Mokhtar,et al.  Performance analysis of hybrid SAC-OCDMA/WDMA system using Random Diagonal code , 2012, 2012 IEEE 3rd International Conference on Photonics.

[15]  S. A. Aljunid,et al.  Investigation of transmission performance for SAC-OCDMA system under long haul transmission distance based on single photodiode detection technique , 2013, 2013 IEEE 11th Malaysia International Conference on Communications (MICC).

[16]  Waqas Ahmed Imtiaz,et al.  Cardinality Enhancement of SAC-OCDMA Systems Using New Diagonal Double Weight Code , 2014, Int. J. Commun. Networks Inf. Secur..

[17]  S. A. Aljunid,et al.  Enhanced probability density function using APD in SAC-OCDMA systems based SPD technique , 2013, 2013 IEEE Symposium on Industrial Electronics & Applications.

[18]  Preeti Singh,et al.  Comparative Analysis of Point to Point FSO System Under Clear and Haze Weather Conditions , 2014, Wireless Personal Communications.