Adaptive Modulation for the MIMO-OFDM System

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

In the past few years, wireless communication technology has witnessed huge developments which have given rise to many new applications leading to transmitting and receiving high data rates without location or movement constraints. In recent years, orthogonal frequency division multiplexing (OFDM) has proved to be one of the most multicarrier successful techniques. The OFDM technique carries out high data rates as well as spatial multiplexing so that multiple antennas can be used at the transmitter and at the receiver. This configuration of antennas is called Multiple Input Multiple Output (MIMO) antennas. In addition to the MIMO and OFDM techniques, adaptive modulation is another important technique that is used to increase the data rate. The adaptive modulation can be carried out with accepted bit error rate (BER) and maximum data throughput on condition that the channel SNR and the Doppler frequency shift are well estimated. Therefore, this work has been conducted to investigate the best modulation scheme that can be used with the instantaneous Rayleigh fading channel corrupted by AWGN and for different speeds of the receiver. Three different communication systems have been considered in this project: the single carrier base band transmission system, the OFDM system and the 2*2 MIMO-OFDM system. Performances of these three systems were evaluated concerning BER and data throughput for different speeds of the receiver, and adaptation was decided accordingly. Switching to the best modulation scheme according to the instantaneous channel conditions, to achieve the desired BER, depends on the values of the signal to noise ratio (SNR) and the Doppler frequency shifts. This was achieved by using a look-up table constructed from the obtained results.

روابط وملفات

التعريف والنوع

رقم الوثيقة

0f11f281-6d04-4344-9a0a-aba655fa1fc8

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

0f11f281-6d04-4344-9a0a-aba655fa1fc8_1.pdf

بيانات النشر

ترجمة العنوان

التضمين التكيفي لمنظومة هوائيات متعددة الإدخال متعددة الإخراج ذات الوصول المتعدد للترددات المتعامدة

ألقاب المؤلفين

[{"name_ar":"محمد باسل شكر","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"يونس محمود عبوش","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

English

المصدر والدورية

اسم المصدر

Adaptive Modulation for the MIMO-OFDM System

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

يونس محمود عبوش

الإعداد

محمد باسل شكر

الاقتباسات الببليوغرافية