Variable Weight Code Division Multiple Access System for Monitoring Vibration of Unequally Distributed Points

Seyedzadeh, Saleh; Glesk, Ivan; Rahimian, Farzad Pour; Kwong, Wing C.

doi:10.1109/icton.2019.8840283

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…It should be noted that the use of optical amplifiers to compensate for losses is possible but increases the system noise as well as the cost of the network. To resolve this problem and support the vibration sensing of unequally distributed points, an SAC-OCDMA system was developed and proposed [ 20 ]. Similarly, for the VW-SAC system, different code families [ 18 , 19 , 21 , 22 ] and detection techniques [ 23 ] have been proposed.…”

Section: Introductionmentioning

confidence: 99%

WON-OCDMA System Based on MW-ZCC Codes for Applications in Optical Wireless Sensor Networks

Seyedzadeh

Agapiou

Moghaddasi³

et al. 2021

Sensors

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The growing demand for extensive and reliable structural health monitoring resulted in the development of advanced optical sensing systems (OSS) that in conjunction with wireless optical networks (WON) are capable of extending the reach of optical sensing to places where fibre provision is not feasible. To support this effort, the paper proposes a new type of a variable weight code called multiweight zero cross-correlation (MW-ZCC) code for its application in wireless optical networks based optical code division multiple access (WON-OCDMA). The code provides improved quality of service (QoS) and better support for simultaneous transmission of video surveillance, comms and sensor data by reducing the impact of multiple access interference (MAI). The MW-ZCC code’s power of two code-weight properties provide enhanced support for the needed service differentiation provisioning. The performance of this novel code has been studied by simulations. This investigation revealed that for a minimum allowable bit error rate of 10−3, 10−9 and 10−12 when supporting triple-play services (sensing, datacomms and video surveillance, respectively), the proposed WON-OCDMA using MW-ZCC codes could support up to 32 simultaneous services over transmission distances up to 32 km in the presence of moderate atmospheric turbulence.

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Section: Introductionmentioning

confidence: 99%

WON-OCDMA System Based on MW-ZCC Codes for Applications in Optical Wireless Sensor Networks

Seyedzadeh

Agapiou

Moghaddasi³

et al. 2021

Sensors

Self Cite

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Performance analysis of optical spectral amplitude CDMA system unipolar codes with double weight construction design

Harshavardhana¹,

Tarannum²

2022

Journal of Optical Communications

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Optical Codes Division Multiple Access is a multiplexing approach in which the transmitter a distinguishable optical code is assigned to each user in the communication channel. OCDMA is designed for radio frequency (RF) communication systems and it is a variation of the CDMA system. Subsequently, to develop all OCDMA communication systems, the success of CDMA in wireless networks, as well as the full benefits of fibre optics, such as good security, extremely high bandwidth, low attenuation, and long-haul transmission. In this research Spectral Amplitude Coding-Optical Code Division Multiple Access is proposed. Initially, Modified Double Weight and Zero Cross-Correlation (MDW-ZCC) is proposed in this research to construct the code design of SAC-OCDMA, it produces the best possible autocorrelation and cross-correlation values. Subsequently, a combined Single Photodiode (SPD) and Direct detection technique is introduced to decode the transmitter information and it reduces the noise. Accordingly, a Gaussian approximation technique is presented to estimate the Bit error rate from the eye diagram of BER and Q-factor. Accordingly, the proposed method is simulated using Python software. The performance metrics are Q-factor, and bit error rate and the proposed method is compared with the existing Three-Dimensional Single Weight Zero Cross-Correlation (3D-SWZCC) Code, Two Dimensional Spectral/Spatial Cyclic Shift (2D-SSCS), and Permutation Matrix Zero Cross-Correlation (PM-ZCC) Code. Subsequently, these results exhibit that the proposed method produces the best performance than the other methods and it estimates the BER. Consequently, future work is based on the study of 3D codes with m-sequence code in the spectral/time/spatial OCDMA domain. The approach has elegantly integrated the design of an encoder and a decoder, allowing the system to efficiently create code in 3D bipolar mode, respectively.

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Variable Weight Code Division Multiple Access System for Monitoring Vibration of Unequally Distributed Points

Cited by 2 publications

References 12 publications

WON-OCDMA System Based on MW-ZCC Codes for Applications in Optical Wireless Sensor Networks

WON-OCDMA System Based on MW-ZCC Codes for Applications in Optical Wireless Sensor Networks

Performance analysis of optical spectral amplitude CDMA system unipolar codes with double weight construction design

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