Photodetector effects on the performance of 2D Spectral/Spatial code in OCDMA system

Matem, Rima; Aljunid, S. A.; Junita, M. N.; Rashidi, C. B. M.; Ahmed, Israa Shihab

doi:10.1016/j.ijleo.2018.10.068

Cited by 13 publications

(2 citation statements)

References 12 publications

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“…In addition, parameter

represents the variance of the total noise power, and for the SAC-OCDMA set-up which employs a multiwavelength laser, it is attained by [ 33 , 34 ]:

where

and

are the variance of the noises incidental to the relative intensity noise (RIN), thermal noise and shot noise.

is expressed as:

denotes the electrical bandwidth, where E represents the electron’s charge.…”

Section: Theoretical Analysismentioning

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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“…In addition, parameter

represents the variance of the total noise power, and for the SAC-OCDMA set-up which employs a multiwavelength laser, it is attained by [ 33 , 34 ]:

where

and

are the variance of the noises incidental to the relative intensity noise (RIN), thermal noise and shot noise.

is expressed as:

denotes the electrical bandwidth, where E represents the electron’s charge.…”

Section: Theoretical Analysismentioning

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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show abstract

“…In addition, OCDMA has also gained attention as a robust and exible system for free-space optical communications (FSO) which are suitable for 5G networks and their applications (Farghal 2019;Sarangal et al 2017). Spectral amplitude coding OCDMA (SAC-OCDMA) is one of the various techniques developed for OCDMA systems(Upadhyay, Shukla, and Chaudhary 2019; Matem et al 2019), because of its simplicity and lower cost of system components.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the performance of a coherent SAC-OCDMA–OFDM–DWDM system using a flat optical frequency comb generator for multiservice networks

et al. 2022

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A SAC-OCDMA-OFDM-DWDM system using a at optical frequency comb generator and a coherent communication system is proposed in this research. The objective is to develop a novel OCDMA communication system that is appropriate and dedicated to multiservice networks. A comparison between the two codes, EDW and RD, has been presented. It has been concluded that the RD code system has better performance in terms of robustness and number of users than the EDW code. By analyzing the BER for several symbol rates and comparing it to the pre-FEC threshold, the proposed system demonstrates its effectiveness against linear and nonlinear effects. Performance evaluation of the proposed system is carried out via co-simulation of OptiSystem and MATLAB.

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MDM‐Incorporated Quad Donut Modes OCDMA‐FSO Scheme for Secure High‐Altitude Platforms‐To‐Satellite Scenarios

Kumari,

Mishra

2024

Int J Communication

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The next generation of communication networks is envisioned to be driven by high‐altitude platform (HAP)‐to‐satellite systems. License‐free narrow beam free space optics (FSO) can provide uninterrupted connectivity in satellite‐enabled Internet of Things scenarios. This work proposes a HAP‐to‐satellite hybrid mode division multiplexing–optical code division multiple access (MDM‐OCDMA) scheme employing zero cross‐correlation (ZCC) and multidiagonal (MD) codes. In high‐speed satellite communications, a 12 × 10‐Gbps hybrid MDM‐OCDMA scheme carrying four donut modes (0, 1, 2, and 3) enables high channel capacity, sufficient spectral efficiency, and data security under severe link conditions. Based on simulations, the hybrid MDM‐OCDMA scheme using the ZCC code achieves a greater FSO link distance of 420 m compared with when using the MD code at a 10e‐9 error correction limit under clear air and weak turbulent scenario. The reliable transmission distance of 250 m is achievable with the 120‐Gbps proposed system, assuming pointing errors of 2 mrad, 1‐dB receiver, and 2.5‐dB transmitter losses. The results also show that the system can sustain an additional loss of 1.5–2 dB over 250 m for all donut modes. Additionally, the system using ZCC code contributes to low power consumption over MD and variable weight ZCC code and thus requires a minimum received power of −4.02 dBm. It also offers high optical signal to noise of 42–52 dB, −11.58 to −22.20 dB of gain, 11.58–22.20 dB of noise figure, and −48.11 to −58.73 dBm of signal power at output over 200–700 m range up to 2 dB of additional loss. Comparative analysis indicates that the proposed system is more efficient, less complex, adequately distance‐friendly (=420 m), and capable of higher data rates (=120 Gbps) compared with other works. This makes it a promising solution for future high‐speed satellite communications considering the impact of link losses and atmospheric conditions.

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Photodetector effects on the performance of 2D Spectral/Spatial code in OCDMA system

Cited by 13 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

Analysis of the performance of a coherent SAC-OCDMA–OFDM–DWDM system using a flat optical frequency comb generator for multiservice networks

MDM‐Incorporated Quad Donut Modes OCDMA‐FSO Scheme for Secure High‐Altitude Platforms‐To‐Satellite Scenarios

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