دراسة العوامل المؤثرة في عرض الحزمة ونسبة خطأ البت في تقنية OFDM باستخدام المنطق العائم

Authors

  • هيثم الرضوان

Abstract

يهدف البحث إلى تحليل أداء تقنية التنضيد بالتقسيم الترددي المتعامد OFDM المستخدمة في شبكات الجيل الرابع وشبكات WiFi. استخدمت في الدراسة تقنية المنطق العائم لتحليل مشاكل تقنية OFDM مع الأخذ بالحسبان عملية التعديل المستخدمة في نظام OFDM. اعتمدت ثلاثة بارامترات للدخل في المنطق العائم وهي : نسبة الإشارة إلى الضجيج ورتبة التعديل وعدد الحوامل الفرعية ، بينما اعتمد بارامتران للخرج وهما فعالية عرض الحزمة ومعدل خطـأ البت. تطلب ذلك دراسة تحليلية لتحديد القيمة المثلى لقيم بارامترات الدخل المستخدمة في الدراسة، مما يعني دراسة توابع العضوية لكل من محددات الدخل والخرج باستخدام المنطق العائم. This work aims to analyze the performance of Orthogonal Frequency Division Multiplexing (OFDM) applied in the fourth generation mobile networks and WiFi. Fuzzy logic technique is used in this study to analyze the problem of OFDM, taking into consideration the modulation techniques applied in OFDM. Three input parameters in the fuzzy logic system are mainly considered: signal-to-noise ratio, the modulation degree and the number of sub-carriers. The output parameters are selected to be the bandwidth and bit error rate. This requires an analytical study to determine the optimal values of the input parameters used in this study. This means studying the membership of functions of each input and output parameter using fuzzy logic.

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Published

2016-07-12

How to Cite

1.
الرضوان ه. دراسة العوامل المؤثرة في عرض الحزمة ونسبة خطأ البت في تقنية OFDM باستخدام المنطق العائم. Tuj-eng [Internet]. 2016Jul.12 [cited 2025Jan.27];37(2). Available from: https://journal.tishreen.edu.sy/index.php/engscnc/article/view/1653

Issue

Vol. 37 No. 2 (2015): العلوم الهندسية

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Articles

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Copyright (c) 2016 ttps://creativecommons.org/licenses/by-nc-sa/4.0/

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