A New Construction of Optical Zero-Correlation Zone Codes

Fassi, Benattou; Taleb‐Ahmed, Abdelmalik

doi:10.1515/joc-2017-0214

Cited by 11 publications

(5 citation statements)

References 7 publications

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“…In the same manner as the OWDD, Figure 3 presents the performance comparison of the existing ZCC codes with AWDD and the proposed code in terms of BER against the number of active users at Psr of −10 dBm. In this case, with the increasing code weight, the BER performances of the existing ZCC codes are similar to that of the proposed code for high-QoS [see (13) for 𝑤 = 𝑤 𝐻 )] with no BER changes for other detected weights (the same results as those in Fig. 2 with OWDD).…”

Section: Theoretical Analysissupporting

confidence: 72%

“…Nonetheless, OCDMA system performance is limited by a multiple access interference (MAI) impact. Numerous one-(1D) [10][11][12][13][14], two-(2D) [15][16][17], and three-(3D) [18] dimensional code schemes have been proposed in the literature review to eliminate the MAI where it is necessary to choose a good family of optical codes admitting a large number of users with a high weight and good auto and cross-correlation properties [less periodic cross-correlation function (PCCF) and periodic auto correlation function (PACF)].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Opto-Electronics Review

Driz,

Fassi,

Kandouci

et al. 2022

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In order to minimize the receiver complexity and improve the performance of the spectral amplitude coding -optical code division multiple access system, a novel one-dimensional zero cross-correlation code using Pascal's triangle matrix has been suggested. This research article shows that the position of chip "1" in the code sequences is one of the important factors affecting system performance. In fact, mathematical results show that, for the allwavelength direct detection, it is possible to reduce the number of filters without sacrificing system performance. In addition, compared to one-wavelength direct detection, the signalto-noise ratio value is increased with an increasing weight by using wide-bandwidth filters as decoders. Performance of the proposed system in terms of the minimum bit error rate is validated using the OptiSystem software. Compared with the previous systems at 622 Mbps, the suggested system gave the best values of bit error rate of around 10 −43 , 10 −35 , and 10 −26 for higher, medium, and lower service demand, respectively.

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Section: Theoretical Analysissupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Opto-Electronics Review

Driz,

Fassi,

Kandouci

et al. 2022

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“…denote a code set with K codes, each has length L and zero correlation zone cz Z . The set is called OZCZ code set [24], [25] if the following correlation properties satisfy…”

Section: A Preliminariesmentioning

confidence: 99%

“…The transmitter and receiver both employ the unipolar code set for the intensity modulation directly in VLC system compared with the construction in [28], [29]. Furthermore, compared with the construction in [24], [25], the proposed code set with different spreading factors can enhance the multi-rate system performance significantly.…”

Section: Properties Of the New Constructionmentioning

confidence: 99%

New Construction of OVSF-OZCZ Codes in Multi-Rate Quasi-Synchronous CDMA VLC Systems for IoT Applications

Chen

Wang

et al. 2020

IEEE Access

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Internet of Things (IoT) has become an emerging vision for next-generation network and attracts many researchers' attention. In this paper, we propose a novel quasi-synchronous code division multiple access (QS-CDMA) visible light communication (VLC) system for IoT network. A new construction of optical zero correlation zone (OZCZ) code set with orthogonal variable spreading factor (OVSF) is presented for this system, which can meet the multi-rate requirement and tolerate time delay. After deriving the construction and properties of the proposed code set, the maximum numbers of simultaneous users and multiple access interference (MAI) characteristic are analyzed. Furthermore, the signal noise ratio (SNR) and bit error rate (BER) performance of this system are also investigated while taking into account the effects of phase-induced intensity noise (PIIN), shot noise, and thermal noise. The numerical results indicate that the new construction can eliminate MAI and PIIN, which can achieve high quality transmission in the multi-rate QS-CDMA-VLC system for IoT applications. INDEX TERMS Visible light communication, internet of things, quasi-synchronous code division multiple access, orthogonal variable spreading factor.

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“…This class of codes is an innovative coding, which ensures ideal autocorrelation and cross-correlation properties within the correlation zone. Various constructions of ZCZ codes such as binary, ternary, polyphase and optical codes have been constructed [7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Enhancing confidentiality protection for ZCZ-OCDMA network using line selection and wavelength conversion based on SOA

Ouis

Driz

Fassi

2020

Journal of Optical Communications

Self Cite

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The physical layer of an optical network is vulnerable towards various types of security threats such as physical infrastructure attacks and eavesdropping, where the security item requires more attention in front of the dramatically grows in network capacity. In this paper, authors propose a comparison in performance of zero correlation zone-Optical Code Division Multiple Access based on different confidentiality mechanisms implemented using existing optical logic components such as line selectors, wavelength convertors and XOR gates. The performance of the proposed designs in terms of log of the bit error rate (BER) as function of the received power was evaluated through OptiSystem software simulation. The achieved results demonstrate that design 3 is the best confidentiality solution in terms of received power, BER performance and architecture complexity.

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A New Construction of Optical Zero-Correlation Zone Codes

Cited by 11 publications

References 7 publications

Opto-Electronics Review

Opto-Electronics Review

New Construction of OVSF-OZCZ Codes in Multi-Rate Quasi-Synchronous CDMA VLC Systems for IoT Applications

Enhancing confidentiality protection for ZCZ-OCDMA network using line selection and wavelength conversion based on SOA

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