Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Odtü Kuzey Kıbrıs Kampusu (Kktc-Güzelyurt), Elektrik-Elektronik Mühendisliği Bölümü, Türkiye
Tezin Onay Tarihi: 2021
Tezin Dili: Türkçe
Öğrenci: BASSAM ABDULWAHAB
Danışman: Tayfun Nesimoğlu
Özet:
Power Amplifiers (PA) are widely used in mobile communication systems, yet
power amplifiers have a non-linear region which is the major problem in all
communication and radar systems. Moreover, PAs show a low power efficiency
when operating in their linear region and are highly non-linear when operating in
their high-efficiency region. To overcome such issues, there are different methods
to linearize PAs and other methods to enhance their power efficiency. These
linearization methods are built to meet a certain linearity level for a specific
application. However, the linearization techniques are not built to cope with the
changes that might occur to the system. In this thesis an adaptive control method
for linearization techniques is proposed and will be studied and tested, the goal is to
achieve a linearization system for the PA that can maintain the desired linearity
level without compromising the efficiency. The idea of the system is to find an
intelligent way that can be added to any linearization technique to detect and
measure any changes in the system and the effect of this change on the system,
then adapt the system to overcome this change and achieve linearity. A digitally
programmable feedback control system will be added to the PA linearization technique, having a microcontroller in a feedback circuitry that will work as an
efficient detector to detect any changes on the sampled signal with accuracy as to
control an adaptive network. Accordingly, the microcontroller will decide the
voltage control changes required to maintain the required linearity.