Analyse Et Evaluation Des Performance De la Modulation Multi porteuses Dans La Transmission d’information

الموضوعات

علوم تطبيقية وتكنولوجية

روابط وملفات

التعريف والنوع

رقم الوثيقة

ee20977f-91f5-4989-be04-925fa1e6f31b

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf text

أسماء الملفات

215632_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"Cherifi Abdelhamid","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"Yagoubi Benabdelah","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

French

المصدر والدورية

اسم المصدر

Analyse Et Evaluation Des Performance De la Modulation Multi porteuses Dans La Transmission d’information

المحتوى والصفحات

عدد الصفحات

0

ترجمة الملخص

This thesis is part of hybrid systems of multi carrier modulation orthogonal OFDM /OCDMA- The division multiple access optical codes (OCDMA: Optical Code DivisionMultiple Access) broadband where bandwidth fiber is shared between multiple users. Suchsystems led to focus on the multiple access techniques already well known in radio frequencycommunication for sharing resources. The division multiple access optical codes (OCDMA)is now considered in this context as an attractive solution. However, in the optical domain,this technique has the disadvantages of being limited in terms of multiplexing capacity andsuffer interference due to unwanted users (multiple access interference (MAI)), This is due tothe non zero cross-correlation products of the codes used.In order to increase the number of users and data rate, and to reduce the impact of multiaccess interference (MAI), this study proposes the optical code division multiple access(OCDMA) systems with orthogonal frequency division multiplexing modulation (OFDM)based on a new zero cross correlation (ZCC) code. The OCDMA, a new ZCC-OFDMsuggested system, was compared to the OCDMA-FCC (Flexible Cross Correlation)-OFDM interms of signal to noise ratio (SNR) and bit error rate (BER). The results showed that theproposed system with the new ZCC code improves the system capacity performance byincreasing the number of simultaneous users (cardinality) up to approximately 120% ascompared to SCM (subcarrier multiplexing) OCDMA-FCC, and up to 7% in comparison toOCDMA-FCC (Flexible Cross Correlation)-OFDM. The adopted system has superiorperformance by saving around -3 dBm of power at the receiver with better bit error rate incomparison to OCDMA-FCC-OFDM system. In addition, the resulting power due to theincreased number of users using our proposed new ZCC code is less in comparison to theFCC code. This improvement is due to the effect of the good auto/cross correlation propertiesof the new ZCC code.

إشراف وإعداد

الإشراف

Yagoubi Benabdelah

الإعداد

Cherifi Abdelhamid

الاقتباسات الببليوغرافية