performance evaluation of orthogonal frequency division multiplexing over frequency selective rayleigh fading HF channel
Joint Authors
al-Madi, Muhannad E.
al-Azzawi, Mahir Khudayr Mahmud
Source
Iraqi Journal of Computer, Communications and Control Engineering
Issue
Vol. 7, Issue 1 (30 Jun. 2007)12 p.
Publisher
Publication Date
2007-06-30
Country of Publication
Iraq
No. of Pages
12
Main Subjects
Abstract AR
في هذا البحث تم التحقق من فعالية منظومة التعدد التقسيمي الترددي المتعامد (OFDM) مع استخدام تقنية التضمين (π /4-DQPSK) للاتصال عبر قناة متغيرة مع الزمن مثل قناة الراديوية عالية التردد (HF Channel).
استخدم تحويل فورير السريع (fft) لتحقيق التعامد بين الحاملات الثانوية و تقليل التعقيد في بناء المنظومة.
تم التحقق من إدارة المنظومة بقيم مختلفة من تأخير الانتشار (delay sprad)، زمن التشاكة (Voherence time) و عدد المسارات.
تم استخدام الفترة الحارسة (guard time) مع الامتداد الدوري (cyclic extension) لتقليل التداخل بين الرموز و الحاملات.
تم استخدام طريقة القطع (clipping method) لتقليل نسبة القدرة للقيمة-إلى-المعدل (PAP) العالية.
Abstract EN
The effectiveness of Orthogonal Frequency Division Multiplexing (OFDM) with π / 4-DQPSK modulation is investigated, for communication over HF channel.
The Fast Fourier Transform (FFT) is used to satisfy the orthogonally between subcarriers and reduce the implementation complexity.
The system performance is investigated for various delay spreads, coherence time and number of propagation paths.
A guard time with cyclic extension is used to reduce channel dispersion, intersymbol and intermarried interference.
Clipping is used to minimize the high peak-to-average power (PAP) ratio.
American Psychological Association (APA)
al-Madi, Muhannad E.& al-Azzawi, Mahir Khudayr Mahmud. 2007. performance evaluation of orthogonal frequency division multiplexing over frequency selective rayleigh fading HF channel. Iraqi Journal of Computer, Communications and Control Engineering،Vol. 7, no. 1.
https://search.emarefa.net/detail/BIM-276755
Modern Language Association (MLA)
al-Madi, Muhannad E.& al-Azzawi, Mahir Khudayr Mahmud. performance evaluation of orthogonal frequency division multiplexing over frequency selective rayleigh fading HF channel. Iraqi Journal of Computer, Communications and Control Engineering Vol. 7, no. 1 (Jun. 2007).
https://search.emarefa.net/detail/BIM-276755
American Medical Association (AMA)
al-Madi, Muhannad E.& al-Azzawi, Mahir Khudayr Mahmud. performance evaluation of orthogonal frequency division multiplexing over frequency selective rayleigh fading HF channel. Iraqi Journal of Computer, Communications and Control Engineering. 2007. Vol. 7, no. 1.
https://search.emarefa.net/detail/BIM-276755
Data Type
Journal Articles
Language
English
Notes
Includes appendices.
Record ID
BIM-276755
