Bit error rate (BER) performance of return-to-zero and non-return-to-zero data signals optical code division multiple access (OCDMA) system based on AND detection scheme in fiber-to-the-home (FTTH) networks

• Autorzy: Aldouri M. Y. , Aljunid S. A. , Ahmad R. B. , Fadhil H. A.
• Języki publikacji: EN

Abstrakty

EN

In this paper, we will focus on the modulation format used to create the optical pulses, which are return-to-zero (RZ), and non-return-to-zero (NRZ). Bit error rate (BER) performance is evaluated based on double weight (DW) code. Optical code division multiple access (OCDMA) system is considered a promising technique for fiber-to-the-home (FTTH) access networks. The performance of RZ against NRZ is compared through simulation by using the Optisystem software version 7. We used two networks designed as follows: one used a RZ pulse generator and the second used a NRZ pulse generator, and both systems were tested with and without erbium doped fiber amplifier (EDFA). It has been found that the NRZ pulse generator in this system is better than the RZ pulse generator for all simulation results. The conversion used a Mach-Zehnder interferometer (MZI) wavelength converter. Also, we are proposing a detection scheme known as the AND subtraction detection technique implemented with fiber Bragg grating (FBG) which acts as an encoder and decoder. This FBG is used to encode and decode the spectral amplitude coding DW code in the OCDMA system. The performances are characterized through BER and bit rate (BR), and also the received power at various bit rates.

Słowa kluczowe

EN

spectral amplitudes coding - optical code division multiple access (SAC-OCDMA); detection scheme subtraction technique; non-return-to-zero (NRZ) and return-to-zero (RZ) pulse generator

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2011
• Tom: Vol. 41, nr 1
• Strony: 173--181
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Aldouri M. Y.

autor

Aljunid S. A.

autor

Ahmad R. B.

autor

Fadhil H. A.

• School of Computer and Communications Engineering 02000, Kuala Perlis, Malaysia

Bibliografia

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• [3] ZAN Z., ALJUNID S.A., YAACOB M.H., ABDULLAH M.K., SHAARI S., Design configuration of encoder and decoder modules for modified double weight (MDW) code spectral amplitudes coding (SAC)optical code division multiple access (OCDMA) based on fiber Bragg grating, Second International Conference on Advanced Optoelectronics and Lasers, Vol. 2, September 12, 2005.
• [4] CHAO-CHIN YANG JEN-FA HUANG SHIN-PIN TSENG, Optical CDMA network codecs structured with M-sequence codes over waveguide-grating routers, IEEE Photonics Technology Letters 16 (2), 2004, pp. 641–643.
• [5] ALJUNID S.A., ISMAIL M., RAMLI A.R., ALI B.M., ABDULLAH M.K., A new family of optical code sequences for spectral amplitude-coding optical CDMA systems, IEEE Photonics Technology Letters 16(10), 2004, pp. 2383–2385.
• [6] NORTE D., WILLNER A.E., Experimental demonstrations of all-optical conversions between the RZ and NRZ data formats incorporating noninverting wavelength shifting leading to format transparency, IEEE Photonics Technology Letters 8 (5), 1996 , pp. 712–714.
• [7] HASOON F.N. , ALJUNID S.A., Spectral amplitude coding ocdma systems using enhanced double weight code, Journal of Engineering Science and Technology 1 (2), 2006, pp. 192–202.