Construction and performance analysis of a new SAC-OCDMA code based on Latin square matrix

In this paper a family of novel spreading code called Latin square code (LSC) is proposed for spectral amplitude coding-optical code division multiple access (SAC-OCDMA) system. The main feature of the proposed code is the zero cross-correlation which eliminates both multiple access interference (MAI) and phase induced intensity noise (PIIN). The code construction can be easily accomplished using Latin square matrix (LSM) for any weight and number of users. The simplicity in the construction code has made it a compelling candidate for future OCDMA applications. SAC- OCDMA system employing direct decoding is mathematically analyzed and then numerically simulated using Matlab and OptiSystem respectively. The results show the improvement given by the LSC code to the SAC-OCDMA system compared to the other codes such as: ZCC (zero cross-correlation) and MMS (modified multiservice) by allowing high cardinality and improving BER. Furthermore, the transmission quality, so that the BER does not exceed the value of 10−9 , is ensured by the LSC code with a lower effective source power of -14.5 dBm, a bit rate of 4.6 Gb/s and a cardinality exceeding ZCC and MMS by 1.7 and 1.22 times respectively. The simulation results validate the mathematical analysis and show that the system makes it possible to increase the transmission distance without affecting QoS (quality of service).

PDF

___

[1] Kadikar RU, Prince S. Software defined architecture on demand: A resilient node approach. In: International Conference on Communication and Signal Processing (ICCSP); Mardas, India; 2016. pp. 147-152.
[2] Beson MRC, Aljunid AS, Ghani F, Anuar MS, Fadhil HA. Alleviation noise effect using flexible cross correlation code in spectral amplitude coding optical code division multiple access systems. Journal of Communications 2013; 8 (2): 101-109. doi: 10.12720/jcm.8.2.101-109
[3] Swadesh M, Islam MS. A new modified prime codes for higher user capacity in smart synchronous OCDMA network. In: International Conference on Electrical Engineering and Information & Communication Technology (ICEEICT); Dhaka, Bangladesh; 2014. pp. 1-5.
[4] Imtiaz WA, Ahmed HY, Zeghid M, Sharief Y. Analysis of noise suppression for OCDMA systems with fixed inphase cross-correlation codes and single O/E converter. Optik 2019; 183: 677-690. doi: 10.1016/j.ijleo.2019.02.052
[5] Salehi JA. Code division multiple access technique in optical fiber networks, Part II: System performance analysis. IEEE Transaction on Communications 1989; 37 (8): 834-842. doi: 10.1109/26.31182
[6] Zhang L, Eyoh CH, Ng CH. Performance of ATM traffic in optical CDMA. International Journal of Communication Systems 2001; 14 (8): 803-812. doi: 10.1002/dac.507
[7] Wei ZH, Shalaby M, Shiraz HG. New code families for fiber-Bragg-grating-based spectral amplitude-coding optical CDMA systems. IEEE Photonics Technology Letters 2001; 13 (8): 890-892. doi: 10.1109/68.935838
[8] Wei ZH, ShalabyMH, Ghafouri-Shiraz H. Modified quadratic congruence codes for fiber bragg-grating-based spec- tral amplitude-coding optical CDMA systems. Journal of Lightwave Technology 2001; 19 (9): 1274-1281. doi: 10.1109/50.948274
[9] Ahmad Anas SB, Abdullah MK, M, Aljunid SA, Walker SD. Optical domain service differentiation using spectral- amplitude-coding. Optical Fiber Technology 2009; 15 (1): 26-32. doi: 10.1016/j.yofte.2008.04.001
[10] Fadhil HA, Aljunid SA, Ahmed RB. Performance of random diagonal code for OCDMA systems using new spectral direct detection technique. Optical Fiber Technology 2009; 15 (3): 283-289. doi: 10.1016/j.yofte.2008.12.005
[11] Kakaee MH, Seyedzadeh S, Fadhil HA, Ahmad Anas SB, Makhfudzah M. Development of multi-service (MS) for SAC–OCDMA systems. Optics & Laser Technology 2014; 60: 49-55. doi: 10.1016/j.optlastec.2014.01.002
[12] Abd TH, Aljunid SA, Fadhil HA. A new code design for spectral amplitude coding optical CDMA systems using fiber bragg-grating. Journal of Optics 2013; 42: 110-115. doi: 10.1007/s12596-012-0110-0
[13] Panda S, Bhanja U. Design performance and analysis of one dimensional zero cross-correlation coding technique for a fixed wavelength hopping SAC-OCDMA. International Journal of Electrical, Computer, Energetic, Electronic and communications Engineering 2015; 9 (11): 1330-1338.
[14] Anuar MS, Alijunid SA, Saad NM, Hamzah SM. New design of spectral amplitude coding in OCDMA with zero cross-correlation. Optics Communications 2009; 282 (14): 2659-2664. doi: 10.1016/j.optcom.2009.03.079
[15] Malleswari M, Murugesan K. Construction and bit error analysis of zero cross-correlation codes for SAC-Optical CDMA systems. Journal of Optics 2013; 42: 307-310. doi: 10.1007/s12596-013-0145-x
[16] Bhanja U, Panda S. Comparison of novel coding techniques for a fixed wavelength hopping SAC-OCDMA. Photonic Network Communications 2017; 33: 179-193. doi: 10.1007/s11107-016-0632-5
[17] Mostafa S, Mohamed AA, AbdEl-Samie FE, Zaki Rashed AN. Eradication of multiple access interference using a modified multi-service code for SAC–OCDMA. Wireless Personal Communications 2015; 83: 855-872. doi: 10.1007/s11277-015-2430-2
[18] Abd TH, Aljunid SA, Fadhil HA, Ahmad RA, Saad NM. Development of a new code family based on SAC- OCDMA system with large cardinality for OCDMA networks. Optical Fiber Technology 2011; 17: 273-280. doi: 10.1016/j.yofte.2011.04.002
[19] Kumawat S, Kumar MR. Design of variable weight code for multimedia service in SAC–OCDMA systems. IET Optoelectronics 2017; 12 (2): 56-64. doi: 10.1049/iet-opt.2017.0046
[20] Yang CC, Huang JF, Tseng SP. Optical CDMA network codes structured with m-sequence codes over waveguide- granting routers. IEEE Photonics Technology Letters 2004; 16 (2): 641-643. doi: 10.1109/LPT.2003.823089
[21] Feng L, Wang J, Hu RQ, Liu L. New design of optical zero correlation zone codes in quasi-synchronous VLC CDMA systems. EURASIP Journal on Wireless Communications and Networking 2015; 120: 1-7. doi: 10.1186/s13638-015- 0360-z
[22] Fadhil HA, Aljunid SA, Ahmed HY, Alkhafaji HMR. Variable cross-correlation code construction for spectral amplitude coding optical CDMA networks. Optik 2012; 123 (11): 956-963. doi : 10.1016/j.ijleo.2011.07.011
[23] Kumari M, Sarangal H. Performance analysis of zero cross correlation code in spectral amplitude coding OCDMA. In: International Conference on Communication, Computing and Systems (ICCCS-2014); Australia; 2014. pp. 21-24