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Wyszukujesz frazę "spectral amplitude coding-optical code division multiple access" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Performance improvement of a novel zero cross-correlation code using Pascal’s triangle matrix for SAC-OCDMA systems
Autorzy:
Driz, Samia
Fassi, Benattou
Kandouci, Chahinaz
Ghali, Fodil
Powiązania:
https://bibliotekanauki.pl/articles/2063900.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
multiple access interference
pascal’s triangle matrix
quality of service
spectral amplitude coding-optical code division multiple access
zero cross-correlation
Opis:
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.
Źródło:
Opto-Electronics Review; 2022, 30, 1; 1--7
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of SHIFTZCC codes for Optical CDMA system
Autorzy:
Panda, Satyasen
Powiązania:
https://bibliotekanauki.pl/articles/1178705.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
cross correlation (CC)
multiple access interference (MAI)
optical code division multiple access (OCDMA)
shift zero cross correlation code (SHIFTZCC) and signal to noise ratio (SNR)
spectral amplitude coding optical code division multiple access (SAC-OCDMA)
Opis:
In this paper, we propose a novel SAC-OCDMA code called Shift Zero Cross Correlation (SHIFTZCC) code with zero cross correlation property to minimize the Multiple Access Interface (MAI), to be more scalable and secure compared to the other existing SAC-OCDMA codes. This SHIFTZCC code is constructed using address segment and data segment. In this work, the proposed SHIFTZCC code is implemented in an optical network using the Opti-System software for the spectral amplitude coded optical code division multiple access (SAC-OCDMA) scheme. The chief advantage of the proposed SHIFTZCC code is the zero cross correlation property, which reduces both the MAI and other noises improving the system performance. The proposed SHIFTZCC code provides flexibility in selecting the code parameters, supports a large number of users with higher data rate and longer fiber length. Simulation results prove that the optical code division multiple access system based on the proposed SHIFTZCC code supports maximum number of simultaneous users with higher transmission rate, lower bit error rates (BER) and longer travelling distance without any signal quality degradation, as compared to the former existing SAC-OCDMA codes.
Źródło:
World Scientific News; 2017, 67, 2; 365-389
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three dimensional optical CDMA framework with direct detection technique
Autorzy:
Panda, Satyasen
Powiązania:
https://bibliotekanauki.pl/articles/1178377.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cross correlation (CC)
Multiple access interference (MAI)
Phase induced intensity noise (PIIN)
Spectral amplitude coding optical code division multiple access (SAC-OCDMA)
Three dimensional modified quadratic congruence/prime hop code (3-D MQC/PHC)
Three dimensional optical code division multiple access (3-D OCDMA)
Opis:
In this paper, a three-dimensional (3-D) wavelength/time/space code is developed for optical code division multiple access (OCDMA) networks with direct detection technique in the receiver side. The 3-D codes are developed by mixing two-dimensional modified quadratic congruence (MQC) code and one-dimensional prime hop code (PHC) code. The encoders and decoders are constructed using fiber Bragg gratings and delay lines to minimize the bit error rate (BER). The performance analysis of the 3-D OCDMA system is based on measurement of signal to noise ratio (SNR), BER, received power and eye diagram for different numbers of simultaneous users. Also, in the analysis, various types of noises and multiple access interference (MAI) effects are considered. The received optical power is also measured at various levels of BER to analyze the effect of attenuation.
Źródło:
World Scientific News; 2017, 77, 2; 337-353
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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