Noise mitigation for OCDMA system with wavelength/time 2D hybrid code

Keraf, N. Din; Aljunid, S. A.; Arief, A. R.; Nurol, M. N.; Anuar, M. S.; Rashidi, C. B. M.; Ehkan, Phaklen

doi:10.1109/icp.2014.7002344

Cited by 4 publications

(4 citation statements)

References 5 publications

(5 reference statements)

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“…[9][10][11] However, one-dimensional codes have a long spectral length, which becomes the primary reason affecting the performance of SAC-OCDMA systems when the amount of users concurrently increases. For this reason, the most researchers developed codes in the two-dimensional (2D) domain to solve the coding problem of (1D) such as flexible cross-correlation/modified double weight code (2D-FCC/MDW), 12,13 diagonal eigenvalue unity code (2D-DEU), 4 single weight zero cross-correlation code (2D-SWZCC), 3 multi diagonal code (2D-MD), 14 pascal's triangle zero cross-correlation code (2D-PTZCC), 7 half spectral spatial zero cross-correlation code (2D-HSSZCC), 15 cyclic shift code (2D-CS). 8,16 Although (2D) coding solves the code length problem of (1D) coding, two-dimensional encoding requires increasing the spatial sequence size by increasing the number of star couplers (SCs) for (2D-spectral/spatial) encoding or increasing the temporal spread for (2D-spectral/time) encoding when raising the cardinality (number of users concurrently).…”

Section: Introductionmentioning

confidence: 99%

“…However, one‐dimensional codes have a long spectral length, which becomes the primary reason affecting the performance of SAC‐OCDMA systems when the amount of users concurrently increases. For this reason, the most researchers developed codes in the two‐dimensional (2D) domain to solve the coding problem of (1D) such as flexible cross‐correlation/modified double weight code (2D‐FCC/MDW), 12,13 diagonal eigenvalue unity code (2D‐DEU), 4 single weight zero cross‐correlation code (2D‐SWZCC), 3 multi diagonal code (2D‐MD), 14 pascal's triangle zero cross‐correlation code (2D‐ PTZCC), 7 half spectral spatial zero cross‐correlation code (2D‐HSSZCC), 15 cyclic shift code (2D‐CS) 8,16 …”

Section: Introductionmentioning

confidence: 99%

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Massive capacity of novel three‐dimensional OCDMA‐FSO system for next generation of high‐data wireless networks

Rahmani,

Sabri,

Cherifi

et al. 2023

Trans Emerging Tel Tech

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The present study examines an interesting wireless system known as spectral/temporal/spatial‐optical code division multiple access‐free space optics (OCDMA‐FSO) by integrating the new three‐dimensional successive weight (3D‐SW) code for the incoherent system. The system is proposed to be adopted in future generations of wireless networks in view of its attractive features such as simple architecture, high data rate, strong immunity against electromagnetic interference, and optimal power consumption. Furthermore, the recommended code has a zero cross‐correlation (ZCC) feature that removes multiple access interference (MAI) and lowers the effect of phase‐induced intensity (PIIN) noise, which primarily affects OCDMA performance. Meanwhile, an original bit error rate (BER) formulation based on the signal‐to‐noise ratio (SNR) calculation has been developed. The computational results clarified that a recommended approach improves optical system efficacy by boosting numerous analytical criteria. Firstly, the numerical outcomes exhibit that the proposed system improves cardinality by 3.67, 3.08, 2.19, and 5 times than the systems using three‐dimensional perfect difference (3D‐PD), both three‐dimensional perfect difference/multi diagonal (3D‐PD/MD) and three‐dimensional‐dynamic cyclic shift/multi diagonal (3D‐DCS/MD), two‐dimensional‐SW, and one‐dimensional‐SW codes, respectively. Further, It saves roughly −7.3 dBm and − 4.2 dBm when moving from (1D) and (2D) to (3D). Second, the implementation of the proposed model under Optisystem software reveals that the system is compatible with optical communication norms and can be used in upcoming generations of wireless networks, where it achieves BER of with better transmission quality reaching 12.09 at a high bit rate until 30 Gbps across a wireless distance up to 6 km.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Massive capacity of novel three‐dimensional OCDMA‐FSO system for next generation of high‐data wireless networks

Rahmani,

Sabri,

Cherifi

et al. 2023

Trans Emerging Tel Tech

View full text Add to dashboard Cite

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“…PIIN is due to the spontaneous emission of the broadband source, and its effect is proportional to the power of the created photocurrent [2]. Thus, the summation of different users' signals at the receiver's end fluctuates in intensity, which increases the variance of the received signal [3]. To suppress it, the value of should be kept as minor as possible.…”

Section: Introductionmentioning

confidence: 99%

Two dimension MDW OCDMA code cross-correlation for reduction of phase induced intensity noise

et al. 2017

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Abstract. In this paper, we first review 2-D MDW code cross correlation equations and table to be improved significantly by using code correlation properties. These codes can be used in the synchronous optical CDMA systems for multi access interference cancellation and maximum suppress the phase induced intensity noise. Low Psr is due to the reduction of interference noise that is induced by the 2-D MDW code PIIN suppression. High data rate causes increases in BER, requires high effective power and severely deteriorates the system performance. The 2-D W/T MDW code has an excellent system performance where the value of PIIN is suppressed as low as possible at the optimum Psr with high data bit rate. The 2-D MDW code shows better tolerance to PIIN in comparison to others with enhanced system performance. We prove by numerical analysis that the PIIN maximally suppressed by MDW code through the minimizing property of cross correlation in comparison to 2-D PDC and 2-D MQC OCDMA code.scheme systems.

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“…codes have been proposed [12][13]. In comparison with one dimensional sequence for code (1D), the system performance has greatly been improved as well as accommodating more users number within two dimensional codes for (2D) [14].…”

Section: Introductionmentioning

confidence: 99%

Noise suppression system of OCDMA with spectral/spatial 2D hybrid code

et al. 2017

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Abstract. In this paper, we propose a novel 2D spectral/spatial hybrid code based on 1D ZCC and 1D MD where the both present a zero cross correlation property analyzed and the influence of the noise of optical as Phase Induced Intensity Noise (PIIN), shot and thermal noise. This new code is shown effectively to mitigate the PIIN and suppresses MAI. Using 2D ZCC/MD code the performance of the system can be improved in term of as well as to support more simultaneous users compared of the 2D FCC/MDW and 2D DPDC codes.

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Noise mitigation for OCDMA system with wavelength/time 2D hybrid code

Cited by 4 publications

References 5 publications

Massive capacity of novel three‐dimensional OCDMA‐FSO system for next generation of high‐data wireless networks

Massive capacity of novel three‐dimensional OCDMA‐FSO system for next generation of high‐data wireless networks

Two dimension MDW OCDMA code cross-correlation for reduction of phase induced intensity noise

Noise suppression system of OCDMA with spectral/spatial 2D hybrid code

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