Performance evaluation of channel modeling techniques in mobile system

مقدم أطروحة جامعية

Jafar, Ahmad Abd al-Karim

مشرف أطروحة جامعية

Muhammad, Ayidah Khalaf

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم الهندسة الكهربائية

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2011

الملخص الإنجليزي

-In mobile communication systems the path loss models are necessary for a proper planning, interference estimation, frequency assignments and cell parameters.

There are numerous path loss models like Okumura, Hata and Lee models, but none of the path loss models can be considered as a universal model.

In this work Hata, Lee, Walfisch-Ikegami and Free Space Loss models have been compared with practical path loss based on series of measurements in Karada district in Baghdad in GSM900 downlink band.

Hata model showed the closest path loss predictions with mean relative error = 9.77% and mean square error = 10.8 dB, But these results are far from good prediction results and need enhancement.

Hata model was optimized using Least Squares method based on measured received signal power.

The optimized Hata model showed much better results from the original Hata with mean relative error = 5.6% and mean square error = 6.96 dB.

The simulation and calculations were implemented using MATLAB R2009b.

The measurements were done using Field Test Display (FTD) with a compatible hand phone to measure signal strength.

AGround Positioning System (GPS) was used to measure the distance from transmitter.

التخصصات الرئيسية

هندسة الاتصالات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-305280