Title :

Performance comparison of coherent versus incoherent direct sequence optical code division multiple access system

Author(s) :

Farhat, Amel [Auteur]
Ecole Nationale d'Ingénieurs de Tunis [ENIT]
Menif, Mourad [Auteur]
Ecole supérieure des communications de Tunis [SUP'COM [TUNIS]]
Lepers, Catherine [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Département Electronique et Physique [TSP - EPH]
Rezig, Houria [Auteur]
Ecole Nationale d'Ingénieurs de Tunis [ENIT]
Gallion, Philippe [Auteur]
Laboratoire Traitement et Communication de l'Information [LTCI]

Conference title :

Photonics North 2008 : International Conference On Applications of Photonic Technology

City :

Montreal

Country :

Canada

Start date of the conference :

2008-06-02

Book title :

Proceedings Photonics North 2008 : International Conference On Applications of Photonic Technology

Publisher :

SPIE Press

Publication date :

2008

English keyword(s) :

DS-OCDMA
Unipolar codes
Coherent source
Monte Carlo
Importance sampling
Beat noise

HAL domain(s) :

Sciences de l'ingénieur [physics]/Optique / photonique

English abstract : [en]

In this paper, we compare the performances of a coherent versus incoherent Direct Sequence Optical Code Division Multiple Access (DS-OCDMA) system. Superstructured Fiber Bragg Grating (S-FBG) encoders/decoders are used to ...
Show more >In this paper, we compare the performances of a coherent versus incoherent Direct Sequence Optical Code Division Multiple Access (DS-OCDMA) system. Superstructured Fiber Bragg Grating (S-FBG) encoders/decoders are used to implement unipolar codes such as Prime Sequence (PS) and Extended Quadratic Codes (EQC) codes. We implement the Importance Sampling (IS) technique, which is a variant of the well-known Monte-Carlo (MC) method, to evaluate the Bit Error Rate (BER) performances of the system. Our simulation results depict that coherent system outperforms the incoherent one. The last system can be used but a BER floor is demonstrated due to the beat noise of the incoherent source. We show that increasing bit rate leads to a deterioration of the BER behavior and requiring an increase of the optical bandwidth of the signalShow less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL