Performance analysis of OCDMA wireless communication system based on double length modified prime code for security improvement

Morsy, Morsy A.; Alsayyar, Abdulaziz S.

doi:10.1049/iet-com.2019.0533

Cited by 18 publications

(18 citation statements)

References 26 publications

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“…The OFDM signal is I/Q encoded by the orthogonal DLMPC, which was introduced in Refs. 26–28 using the optical Mach-Zehnder modulator. The purpose of designing this code is to obtain a better BER performance, system security improvement, and enhanced system capacity in comparison with other relevant codes used in coherent optical transmission.…”

Section: Proposed System Architecture and Modelingmentioning

confidence: 99%

“…The wireless link power budget equation can be expressed by the following equation according to the link parameters, which are illustrated in Table 1 28 Pr=Pt(ηtηA4πAtλ2)LtpLatmLpolLrp(Ar4πd2)ηr,where Pt and Pr are the optical power transmitted and optical power received, respectively. However, for large-scale refraction and small-scale scattering effects, the gamma–gamma channel model is recommended.…”

Section: Proposed System Architecture and Modelingmentioning

confidence: 99%

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Multi-users different rates visible light communication system for sixth-generation multimedia applications

Alsayyari

2023

Opt. Eng.

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.The two most significant issues that communication engineers have been confronting since the development of fifth-generation wireless networks are bandwidth increase and energy-saving techniques in data transmission. We present an innovative solution for utilizing a multi-user different-rates visible light communication (VLC) system for sixth-generation applications. Such a solution takes advantage of orthogonal frequency division multiple access (OFDMA) with orthogonal codes as multiple access communication networks. For the achievement of energy-saving and wide beam width of the optical source, the light emitting diode is often used as a transmitter. Furthermore, one of the most popular orthogonal codes in use is the double length modified prime code, which has been utilized for enhancing communication network security and network capacity. Most importantly, the performance of the network is evaluated versus the number of users, taking into consideration the amount of noise resulting from the multiple access interference, shot noise, and thermal noise. The error vector magnitude has also been considered for performance analysis and results. Significantly, the obtained results show the possibility of accommodating 110 users at an error rate of no more than 10 − 9 and a data rate per user of 50 Gbps.

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Section: Proposed System Architecture and Modelingmentioning

confidence: 99%

Section: Proposed System Architecture and Modelingmentioning

confidence: 99%

Multi-users different rates visible light communication system for sixth-generation multimedia applications

Alsayyari

2023

Opt. Eng.

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“…In [52,53], a 2D optimized MPC (OMPC) was developed to improve the BER performance of the PPM-OCDMA system by increasing the code weight of the DL-MPC to an optimum value. The MAI cancellation receiver was used to improve the signal-to-noise ratio.…”

Section: Literature Reviewmentioning

confidence: 99%

A New Hybrid Prime Code for OCDMA Network Multimedia Applications

Morsy

Aly

2021

Electronics

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This paper presents a new family of spreading code sequences called hybrid prime code (HPC), to be used as source code for the optical code division multiple access (OCDMA) network for large network capacity. The network capacity directly depends on the number of available code sequences provided and their correlation properties. Therefore, the proposed HPC is designed based on combining two or more different code words belonging to two or more different prime numbers. This increases the number of code sequences generated. The code construction method utilized allows the generation of different code sets, each with different code length and weight, according to the number of prime numbers used. In addition, the incoherent pulse position modulation (PPM) OCDMA system is proposed based on the HPC code. Furthermore, the bit error rate (BER) performance analysis is introduced versus the received optical power and the number of active users. Moreover, the error vector magnitude (EVM) is calculated versus the optical signal-to-noise ratio. This work proves that using two prime numbers simultaneously generates far more codes than using prime numbers separately. It also achieved an OCDMA system capacity higher than the system that uses the optical orthogonal codes (OOCs), modified prime codes (MPCs) families, and two code families with separate simultaneously prime numbers, at a BER below 10−9 which is the optimum level.

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“…In the literature, various code schemes have been proposed to overcome the MAI problem among multiple users for the SAC-OCDMA systems, such as M-sequence codes [12], optical orthogonal codes [13][14][15][16], prime codes [17], double weight codes [18][19][20], and random diagonal (RD) codes [21]. The construction of the code is limited by the code length parameters, as is the case for the modified quadratic congruence [22,23] and Dynamic Cyclic shift codes [1].…”

Section: Introductionmentioning

confidence: 99%

“…The construction of the code is limited by the code length parameters, as is the case for the modified quadratic congruence [22,23] and Dynamic Cyclic shift codes [1]. For the case of prime codes [13,24] and random codes [21], cross-correlation increases with the weight number while the code length is large for KS and EDW codes. As a result, code design cannot be used for any number of simultaneous users or high data rates in the SAC-OCDMA systems.…”

Section: Introductionmentioning

confidence: 99%