The multi-service schemes for SAC-OCDMA systems with variable code weight

Nisar, Kottakkaran Sooppy; Ahmed, Hassan Yousif; Zeghid, Medien; Imtiaz, Wagas A.; Sarangal, Himali; Thapar, Simrandeep Singh

doi:10.1007/s11082-021-02932-w

Cited by 9 publications

(3 citation statements)

References 33 publications

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“…In [22], a variable ZCC (VZCC) code is studied with a DD technique. This code requires a larger code length to support different quality of services.…”

Section: Related Workmentioning

confidence: 99%

New Algorithm for a Fixed Right Shift Code to Support Different Quality of Services in Smart and Sustainable Optical Networks

et al. 2022

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Smart and sustainable cities require a network that can ensure many exchanges of information. In this sense, the deployment of optical fiber seems essential in order to guarantee urban interconnection. In this work, a new algorithm for the right shift code to be used in optical fiber communication (OFC) is proposed. The algorithm was designed to support different quality of services (audio, video, and data) for smart cities. This algorithm was based on varying the code weight for a certain number of users and transmitting a service to them. This algorithm was used for a spectral amplitude-coding optical code division multiple-access (SAC-OCDMA) system. Two detection scheme approaches were used, which are the single photodiode (SPD) detection technique and the direct detection (DD) technique. The performance was analytically studied for the proposed system in terms of BER, SNR, and the maximum number of users. The obtained results, when our system used SPD, showed an improvement in the number of users, about 2.5% at 622 Mbps and 1.4% at 1.25 Gbps and 2.5 Gbps. It can support a number of users up to 151 for video services at BER = , 300 for audio services with BER = , and 162 for data services at BER = at a data rate of 1.25 Gbps. Furthermore, the system was simulated and showed transmission distances of 30 km at 1.25 Gbps and 6 km at 2.5 Gbps for video services, 80 km at 1.25 Gbps and 30 km at 2.5 Gbps for audio services, and 44 km at 1.25 Gbps and 13 km at 2.5 Gbps for data services. Our proposed system is suggested to be implemented in a fixed fifth-generation passive optical network (F5G PON).

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“…In [22], a variable ZCC (VZCC) code is studied with a DD technique. This code requires a larger code length to support different quality of services.…”

Section: Related Workmentioning

confidence: 99%

New Algorithm for a Fixed Right Shift Code to Support Different Quality of Services in Smart and Sustainable Optical Networks

et al. 2022

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“…In general multiservice SAC-OCDMA networks, a differentiated QoS in terms of bit-error rate (BER) is indicated by the weight of the code sequence uniquely assigned to an end user. [16][17][18][19] Data transmissions with a high-weight code refer to a low BER value measured at decoders, as such code contributes a more significant signal power than the low-weight one for a given noise level. Except for efficiently supporting multiservice applications, MAI and PIIN are constrained in several multiweight coding schemes as the employed code words have an ideal cross-correlation value of 1.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it drives the demand of transmitting diversified traffics with various quality of service (QoS). In general multiservice SAC-OCDMA networks, a differentiated QoS in terms of bit-error rate (BER) is indicated by the weight of the code sequence uniquely assigned to an end user 16 – 19 Data transmissions with a high-weight code refer to a low BER value measured at decoders, as such code contributes a more significant signal power than the low-weight one for a given noise level.…”

Section: Introductionmentioning

confidence: 99%

Multiservice transmissions in optical code-division multiple access networks of spectral amplitude coding based on hypothesis testing and multiple chip decoding

Chen

2022

Opt. Eng.

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. I propose a multiservice scheme in optical code-division multiple access (OCDMA) networks by adapting hypothesis testing to a receiver design of multiple chip decoding. Each transmitted bit of a single user is divided into several time-domain chips carrying an identical spectral amplitude coding (SAC) signature. Multiservice transmissions are achieved by assigning the users with different chip numbers based on the user classes. Hypothesis testing is employed to derive the required chip number supporting the desired bit-error rate (BER) performance. Numerical results have shown that efficient BER classifications are achieved among distinctive classes for multiple conditions of user numbers and power levels. The proposed multiservice scheme can be transparently applied to SAC-OCDMA systems with existing optical codes and various user class numbers.

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Performance estimation of 100 GB/s hybrid SACOCDMA-FSO-MDM system under atmospheric turbulences

Sarangal¹,

Thapar

Nisar

et al. 2021

Opt Quant Electron

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The multi-service schemes for SAC-OCDMA systems with variable code weight

Cited by 9 publications

References 33 publications

New Algorithm for a Fixed Right Shift Code to Support Different Quality of Services in Smart and Sustainable Optical Networks

New Algorithm for a Fixed Right Shift Code to Support Different Quality of Services in Smart and Sustainable Optical Networks

Multiservice transmissions in optical code-division multiple access networks of spectral amplitude coding based on hypothesis testing and multiple chip decoding

Performance estimation of 100 GB/s hybrid SACOCDMA-FSO-MDM system under atmospheric turbulences

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