Performance Enhancement of Encoding–Decoding Multidiagonal and Walsh Hadamard Codes for Spectral Amplitude Coding-Optical Code Division Multiple Access (SAC-OCDMA) Utilizing Dispersion Compensated Fiber
| Autor: | Riyadh Khlf Ahmed, Majidah H. Majeed |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Computer science
Code division multiple access 05 social sciences 02 engineering and technology Condensed Matter Physics Atomic and Molecular Physics and Optics Hadamard transform 0502 economics and business 0202 electrical engineering electronic engineering information engineering 050211 marketing 020201 artificial intelligence & image processing Electrical and Electronic Engineering Spectral amplitude Performance enhancement Algorithm Decoding methods Coding (social sciences) |
| Zdroj: | Journal of Optical Communications. |
| ISSN: | 2191-6322 0173-4911 |
| DOI: | 10.1515/joc-2019-0233 |
| Popis: | Spectral Amplitude Coding-Optical Codes Division Multiple Access (SAC-OCDMA) is a future multiplexing technique that witnessed a dramatic attraction for eliminating the problems of the internet in optical network field such as multiple-user access and speed’s growth of the files or data traffic. In this research article, the performance of SAC-OCDMA system based on two encoding–decoding multidiagonal (MD) and Walsh Hadamard (WH) codes is enhanced utilizing three different schemes of dispersion compensating fiber (DCF): pre-, post- and symmetrical compensation. The system is simulated using Optisystem version 7.0 and Optigrating version 4.2. The performance of the proposed system is specified in terms of bit error rate (BER), Q-factor and eye diagram. It has been observed that the compensated system based on MD code is performs much better compared to the system based on WH code. On the other hand, the compensated SAC-OCDMA system with symmetrical DCF has the lowest values of BER and largest values of Q-factor, so it is considered the best simulated scheme contrasted with pre- and post-DCF. |
| Databáze: | OpenAIRE |
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