Design of space time block code ultra-wideband (UWB) system based on discrete wavelets transform
Author
Source
Journal of Babylon University : Journal of Applied and Pure Sciences
Issue
Vol. 18, Issue 3 (30 Sep. 2010)14 p.
Publisher
Publication Date
2010-09-30
Country of Publication
Iraq
No. of Pages
14
Main Subjects
Telecommunications Engineering
Topics
Abstract AR
تحري الأداء للنظام الترميز الكتلي الزماني المكاني المتعدد الطبقات لمازج مقسم التردد المتعامد لحزمة فائقة العرض.
بما أن نموذج القناة افترض على أنه ظل اللوغاريتم الطبيعي نسبة إشارة إلى الضوضاء الناتجة ستتبع توزيع ريلي.
بناء على ذلك اشتقت احتمالية الانقطاع نضريا و أثبتت بواسطة المحاكات.
في هذه الورقة نظام (STBC MB-OFDM UWB) بمرسلتين و مستلمتين لتحقيق معدل نقل البيانات (1 Gbps) تم تصميمه.
و قمنا بدراسة المواصفات للأنظمة المصممة تحت تأثير مختلف نماذج القنوات.
و معدل أخطاء (BERs) المدى العامل لهذه الأنظمة من خلال المحاكات تم حسابها مقارنتها مع بعضها و من خلال النتائج تبين أن استخدام هوائيين في الاستلام و لإرسال أفضل رائعة من استخدام هوائي واحد في نظام (STBC MB-OFDM UWB).
و أخيرا نتائج المحاكات بينت أن أنظمة (STBC MB-OFDM UWB) المصممة باستخدام تحويل المويجة تعطي نتائج رائعة مقارنتا مع نفس النظام المصمم باستخدام تحويلات فورير.
نتائج المحاكات اعتمدت لكي تعزز التحليل النظري لها.
Abstract EN
Outage performances are investigated for space-time block coded multiband orthogonal frequency division multiplexing ultra-wideband systems STBC MB-OFDM UWB using discrete wavelet transform DWT.
As the channel model considers the log-normal shadowing, the resultant signal to noise ratio (SNR) follows a Rayleigh's distribution.
Based on this, we determined Bit error rate BER by simulations.
Also, the design of STBC MB-OFDM UWB systems, with two transmit and one or two receive antennas using DWT and fast Fourier transform FFT, for achieving 1 Gbps data rate.
We study the performance of these systems with different channel models schemes.
The BERs and the operating range of these systems are obtained using frequency domain baseband simulations as well as more realistic full-system simulations, and are compared to those of single antenna systems.
Simulation results show that the STBC MB-OFDM UWB systems provide significant gains for 1 Gbps transmission over single antenna MB-OFDM UWB systems.
We show that the BER performance of STBC MB-OFDM UWB system is the product of the number of transmit and receive antennas, the number of multipath components, and the number of jointly encoded OFDM symbols.
Interestingly, the diversity gain does not severely depend on the fading parameter, and the diversity advantage obtained under Rayleigh's fading with arbitrary parameter is almost the same as that obtained in Rayleigh fading channels.
Finally, simulation results show that the STBC MB-OFDM UWB systems with discrete wavelets transform dwt provide significant gains for 1 Gbps transmission over mb-ofdm uwb systems using conventional method with Fast Fourier transform FFT.
American Psychological Association (APA)
Abd al-Rahim, Layth Ali. 2010. Design of space time block code ultra-wideband (UWB) system based on discrete wavelets transform. Journal of Babylon University : Journal of Applied and Pure Sciences،Vol. 18, no. 3.
https://search.emarefa.net/detail/BIM-287422
Modern Language Association (MLA)
Abd al-Rahim, Layth Ali. Design of space time block code ultra-wideband (UWB) system based on discrete wavelets transform. Journal of Babylon University : Journal of Applied and Pure Sciences Vol. 18, no. 3 (2010 ).
https://search.emarefa.net/detail/BIM-287422
American Medical Association (AMA)
Abd al-Rahim, Layth Ali. Design of space time block code ultra-wideband (UWB) system based on discrete wavelets transform. Journal of Babylon University : Journal of Applied and Pure Sciences. 2010. Vol. 18, no. 3.
https://search.emarefa.net/detail/BIM-287422
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references.
Record ID
BIM-287422