Performance and comparison of fiber vibration sensing using SAC-OCDMA with direct decoding techniques

Taiwo, Ambali; Seyedzadeh, Saleh; Taiwo, Sulaiman; Sahbudin, Ratna Kalos Zakiah; Yaacob, Mohd Hanif; Mokhtar, M.

doi:10.1016/j.ijleo.2014.04.055

Cited by 16 publications

(9 citation statements)

References 12 publications

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“…The length of the frame is determined in a specific range. Comparing with CDMA, the frame length in UMTS start from 40 bits per frame and reach to up to 5100 bits per frame while in the CDMA the size of the input data has values start from 380 bits per frame and by specific sequence, the frame values reach to 20730 bits per frame [4] [5]. Figure 1 below shows a Recursive systematic convolution code (RSC) used by CDMA.…”

Section: The Cdma2000 Turbo Codementioning

confidence: 99%

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Performance of Turbo Code in CDMA under AWGN Channel

Babiker¹,

Khalifa²,

Hashim³

et al. 2017

IJFGCN

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Section: The Cdma2000 Turbo Codementioning

confidence: 99%

“…Subsequently, these two encoders just vary by the presence of the second parity output in the CDMA 2000 encoder. The encoder utilized as a part of the parallel linked coding structure [4,5,6]. …”

Section: The Cdma2000 Turbo Codementioning

confidence: 99%

Performance of Turbo Code in CDMA under AWGN Channel

Babiker¹,

Khalifa²,

Hashim³

et al. 2017

IJFGCN

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show abstract

“…Afterwards, a novel FBG accelerometer based on a diaphragm was presented, which offered a linear response over a wider frequency range from 10 to 200 Hz [ 27 ]. In addition, with the development of vibration sensors, several schemes of FBG sensors are applied to the field of quasi-distributed vibration measurements [ 28 , 29 ]. However, all of the aforementioned methods require prior knowledge of the potential vibration positions, which is not suitable for some practical applications.…”

Section: Introductionmentioning

confidence: 99%

Distributed Fiber-Optic Sensors for Vibration Detection

Liu

Jin

Bai

et al. 2016

Sensors

186

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Distributed fiber-optic vibration sensors receive extensive investigation and play a significant role in the sensor panorama. Optical parameters such as light intensity, phase, polarization state, or light frequency will change when external vibration is applied on the sensing fiber. In this paper, various technologies of distributed fiber-optic vibration sensing are reviewed, from interferometric sensing technology, such as Sagnac, Mach–Zehnder, and Michelson, to backscattering-based sensing technology, such as phase-sensitive optical time domain reflectometer, polarization-optical time domain reflectometer, optical frequency domain reflectometer, as well as some combinations of interferometric and backscattering-based techniques. Their operation principles are presented and recent research efforts are also included. Finally, the applications of distributed fiber-optic vibration sensors are summarized, which mainly include structural health monitoring and perimeter security, etc. Overall, distributed fiber-optic vibration sensors possess the advantages of large-scale monitoring, good concealment, excellent flexibility, and immunity to electromagnetic interference, and thus show considerable potential for a variety of practical applications.

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“…Further, multilevel OCDMA system was intruded in which high and low weight users transmit their signal at a lower and higher power levels, respectively [4]. OCDMA systems have also received attention in last mile access networks [5], optical sensor networks [6,7] and free space optical communication [8].…”

Section: Introductionmentioning

confidence: 99%

Variable weight spectral amplitude coding for multiservice OCDMA networks

Seyedzadeh

Rahimian

Glesk

et al. 2017

Optical Fiber Technology

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The emergence of heterogeneous applications such as internet data, video streaming, and online gaming, brings in a demand for a network environ- ments with capability of supporting diverse Quality of Services (QoS). Prioritizing the services is essential to ensure the delivery of information is at their best. This paper proposes a new code family to support optical domain service differentiation using spectral amplitude coding techniques within an optical code division multiple access (OCDMA) scenario. A particular user or service has a varying weight applied in order to obtain the desired signal quality. The proposed variable-weight code (VW-code) is constructed based on basic multi-service (MS) code. Mathematical model is developed to for performance evaluation of VW-MS code. In addition, the properties of pro- posed code is compared with other VW-OCDMA codes. It is shown that the proposed VW-MS provide an optimal code length with minimum cross- correlation compared to other VW-codes. Performance of VW-MS designed for triple-play services operating at bit rates of 0.622, 1.25 and 2.5 Gbps is demonstrated

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Performance and comparison of fiber vibration sensing using SAC-OCDMA with direct decoding techniques

Cited by 16 publications

References 12 publications

Performance of Turbo Code in CDMA under AWGN Channel

Performance of Turbo Code in CDMA under AWGN Channel

Distributed Fiber-Optic Sensors for Vibration Detection

Variable weight spectral amplitude coding for multiservice OCDMA networks

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