Results 41 to 50 of about 2,557 (191)
Journal of Engineering, Volume 2026, Issue 1, 2026.We investigate the performance limits of spectral amplitude coding optical code‐division multiple access (SAC‐OCDMA) systems from a receiver‐centric perspective. Existing approaches have focused largely on code design and uniform receiver architectures; however, these measures provide only partial mitigation and lead to rapid BER saturation as the ...
R. Endut +8 more
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Advances in OptoElectronics, Volume 2015, Issue 1, 2015., 2015 Wavelength‐division‐multiplexing passive‐optical‐network (WDM‐PON) has been recognized as a promising solution of the “last mile” access as well as multibroadband data services access for end users, and WDM‐RoF‐PON, which employs radio‐over‐fiber (RoF) technique in WDM‐PON, is even a more attractive approach for future broadband fiber and wireless ...
Shuai Chen +6 more
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Distributed-phase OCDMA encoder-decoders based on fiber Bragg gratings
, 2007 We propose and demonstrate new optical code-division multiple-access (OCDMA) encoder-decoders having a continuous phase-distribution. With the same spatial refractive index distribution as the reconfigurable optical phase encoder-decoders, they are ...
Ibsen, M. +4 more
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Nonlinear Effect and MAI Impact on SAC-OCDMA System Based on 2D Multi-Diagonal Code and Laser Array
Applied Sciences, 2021 A new architecture for Spectral Amplitude Coding Optical Code Division Multiple Access (SAC-OCDMA) system based on two Dimensional Multi Diagonal (2D-MD) codes named 2D-MD SAC-OCDMA and utilizing a laser optical source is proposed for Long-Reach Passive ...
Hichem Mrabet +4 more
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International Journal of Optics, Volume 2025, Issue 1, 2025.Free‐space optical (FSO) communication is vital for modern wireless systems due to its high data rates, energy efficiency, secure transmission, and cost‐effectiveness. However, weather‐induced attenuation, turbulence, and pointing errors affect performance.
Ashenafi Paulos Forsido +3 more
wiley +1 more source
Mathematical Problems in Engineering, Volume 2015, Issue 1, 2015., 2015 This study proposes novel three‐dimensional (3D) matrices of wavelength/time/spatial code for code‐division multiple‐access (OCDMA) networks, with a double balanced detection mechanism. We construct 3D carrier‐hopping prime/modified prime (CHP/MP) codes by extending a two‐dimensional (2D) CHP code integrated with a one‐dimensional (1D) MP code.
Chih-Ta Yen, Chih-Ming Chen, Mo Li
wiley +1 more source
Free Space Optics: Current Applications and Future Challenges
International Journal of Optics, Volume 2015, Issue 1, 2015., 2015 FSO is a communication system where free space acts as medium between transceivers and they should be in LOS for successful transmission of optical signal. Medium can be air, outer space, or vacuum. This system can be used for communication purpose in hours and in lesser economy.
Aditi Malik +2 more
wiley +1 more source
Analysis of Optical CDMA Signal Transmission: Capacity Limits and Simulation Results
EURASIP Journal on Advances in Signal Processing, 2005 We present performance limits of the optical code-division multiple-access (OCDMA) networks. In particular, we evaluate the information-theoretical capacity of the OCDMA transmission when single-user detection (SUD) is used by the receiver.
Yim Raymond MH +3 more
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International Journal of Communications, Network and System Sciences, 2008 Overloading is a method to extend capacity limitation of multiple access techniques. The system becomes overloaded, when the number of users exceeds the signal dimensions. One of the efficient schemes to overload a CDMA system is to use two sets of orthogonal signal waveforms (O/O).
Preetam Kumar, Saswat Chakrabarti
openaire +2 more sources
Guangtongxin yanjiu, 2008 对双极性光码分多址（OCDMA）系统采用码的单/双极性转换思路,将相关性能更优秀的双极性码应用于传统单极性OCDMA信道中,提出了一种采用双极性完全互补序列的OCDMA编解码方案及系统模型。仿真结果表明,完全互补的OCDMA系统与基于Gold序列的OCDMA系统性能相比有较大的优势。采用完全互补序列作为地址码,可以有效降低OCDMA系统中的多址干扰,提高通信质量。
陈雷 +4 more
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