| Titre : | Analyse et évaluation des performances du système hybride OCDMA-OFDM basé sur des codes 3D-Multi- Diagonal. |
| Auteurs : | Mr. Cherifi Abd Elhamid, Directeur de thèse ; Bellia Roqiya Bellia Roqiya, Auteur |
| Type de document : | texte imprimé |
| Editeur : | Algèrie:unv saida-Dr Moulay Tahar, 2018 |
| Format : | 62 p / Figure et tableaux / 29 cm |
| Accompagnement : | CD rom |
| Note générale : | Bibliographie |
| Langues: | Français |
| Mots-clés: | Electronique |
| Résumé : |
This memo is part of the OCDMA OFDM / OCDMA, and OCDMA is a broadband access system where the fiber bandwidth is shared by multiple users. This type of system will pay attention to the multiple access technologies already known in RF communications to share resources. Today, OCDMA is an attractive solution. However, in this visual field, the technology has limitations in terms of multicast and interference from unwanted users (MAI). Non-zero cross-link products of the symbols used. In order to increase the number of users of these systems and transfer data, improve multiplexing capability and reduce the impact of multi-intervention (MAI), this study proposes the structure of the OFDM / OCDMA hybrid system based on the new Multi- Diagonal (MD) code. The proposed OCDMA system - the new MD-OFDM - was compared to OCDMA-FCC (OFDM) in terms of signal-to-noise ratio (SNR) and binary error rate (BER). The results showed that the proposed system with the new MD code improved system capacity performance by increasing the number of concurrent users up to 120% compared to the FCC- OCDMA SCM system and up to 7% compared to FCC-OFDM- OCDMA. The certified system has a higher performance by recording about 3 dB of power in the future with a better BER rate. In addition, the capacity achieved as a result of the increase in the number of users using the proposed new MD code is lower than the FCC code, To the effect of the good self- interconnection and interconnection properties of the new MD code. The proposed new MD code was introduced. Finally, conclusions and views will be presented at the end of this note. |
| Note de contenu : |
Introduction général Effets des multitrajets Accès multiple par répartition de code optique Construction du code Multi Diagonal (MD) -Conclusion générale |
Exemplaires (1)
| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| TECT06001 | T.EN.MS00431 | Périodique | Ouvrages | 28 | Libre accès Disponible |
