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Register a new userFlexible GSM Equalizer for User-Defined QoS, Based on Software Defined Radio
مسوي GSM مرن لنوعية خدمة محددة من قبل المستثمر بالاعتماد على نظم الاتصالات اللاسلكية المحددة برمجيا
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Added by
Damascus University ورقة بحثية
Publication date
2008
fields
Communication Engineering
and research's language is
العربية
Created by
Shamra Editor
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نقدم في بداية هذه المقالة تمهيدًا عن نظم الاتصالات اللاسلكية المحددة برمجيًا، ثم نستعرض في الفقرة الثانية - و بشكل سريع - أهم خصائص نظام GSM و سبل رفع نوعية الخدمة فيه. و بعد تعرف موجز على أهم تأثيرات الخفوت في الفقرة الثالثة، نقوم في الفقرة الرابعة بتحليل الخوارزمية المستخدمة لأداء وظائف التسوية في GSM. و نعتمد في الفقرتين الخامسة و السادسة على نتائج المحاكاة في التصنيف الفعال لمعاملات المسوي، و المتغيرة بحسب مستوى نوعية الخدمة المحدد من المستثمر. حيث نبين أهمية ذلك في الاستخدام الأمثل لموارد الكيان الصلب المخصصة لأداء وظائف معالجة الإشارة الرقمية، و في التخفيض في الاستطاعة المستهلكة اللازمة لهذه الوظائف.
In the introduction of this paper, we present a background on SDR, in section 2, we give a quick demonstration of main GSM features and ways to improve QoS in it. After a short recognition of key fading effects in section 3, we analyze in section 4 the Soft Output Viterbi Algorithm used to perform equalization tasks in GSM. In sections 5 and 6, we use simulation results to effectively categorize variable parameters of the flexible equalizer upon user defined level of QoS. We show also the importance of such approach in effectively utilizing hardware resources dedicated for performing digital signal processing tasks, and in reducing power consumption required for these tasks.
References used
B. Enrico, "The Software Radio Concept", IEEE Communications Magazine, September 2000, pp. 138-143
J. Mitola, "The Software Radio Architecture", IEEE Communications Magazine, May 1999, pp. 26-37
W.H. Tuttlebee Et al, "Software Defined Radio, Baseband Technologies for 3G Handsets and Basestations", John Wily, 2004
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In the introduction of this paper, we present a background on SDR, in
section 2, we give a quick demonstration of main IS-95 features and ways to
improve QoS in it. After a short recognition of key fading effects in section
3, we analyze in sectio
n 4 the principle of Rake reception. In section 5, we
use simulation results to effectively categorize variable number of fingers of
the flexible Rake receiver upon user defined level of QoS, and we show the
importance of such approach in effectively utilizing hardware resources
dedicated for performing digital signal processing tasks, and in reducing
power consumption required for these tasks.
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software-defined networks technology. One of the most important components of this
technology is the controller, which is the smartest component in the network.
Many of the
controllers have been developed since the technology originated, and many researches
have been done to compare the performance of these controllers for productivity, delay and
protection.
And due to the importance of selecting the appropriate controller according to different
parameters and network states, we studied the performance of four controllers: Floodlight,
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time. Finally, the Floodlight controller was the best in terms of establishing connection
with the switch because it needed less time.
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