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Register a new userStudying the Effects of Bandwidth and Bit Error Rate on the OFDM Technique Using Fuzzy Logic
دراسة العوامل المؤثرة في عرض الحزمة و نسبة خطأ البت في تقنية OFDM باستخدام المنطق العائم
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يهدف البحث إلى تحليل أداء تقنية التنضيد بالتقسيم الترددي المتعامد OFDM المستخدمة في شبكات الجيل الرابع و شبكات 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 و هي : نسبة الإشارة إلى الضجيج و رتبة التعديل و عدد الحوامل الفرعية ، بينما اعتمد بارامتران للخرج و هما فعالية عرض الحزمة و معدل خطـأ البت. تطلب ذلك دراسة تحليلية لتحديد القيمة المثلى لقيم بارامترات الدخل المستخدمة في الدراسة، مما يعني دراسة توابع العضوية لكل من محددات الدخل و الخرج 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.
References used
D.Tse, "Optimal Power Alsslocation over Parallel Gaussian Broadcast Channels," Proceedings of International Symposium on Information, Ulm Germany, 1997, pp.27-31
C.Y.Wong, R.S.Cheng, K.B.LEtaief, and R.D.Murch, "Multiuser OFDM with Adaptive Subcarrier, Bit, and Power Allocation", IEEE Journal on Selected Areas in Communications, 1999,vol. 17,pp. 1747-1758
D.Kivanc, G.Li and H. Liu, Computationally efficient bandwidth allocation and power control for OFDMA, IEEE Trans. Wireless Commun.,2003, Vol.2, pp.1150-1158
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