The aim of my thesis is to introduce different synchronization methods which can be used in two-tier femtocell/small cell systems considering the requirements of 5G networks. The thesis focuses on the RIBS solution, which is appropriate, if any GPS- or packet-based synchronization solutions cannot be used either. Chapter 1 gives a brief overview about the structure of LTE systems in order to understand the synchronization methods. The main emphasis is on the advantages of LTE and on the frame structure of the LTE FDD.
Chapter 2 introduces definitions and requirements related to the synchronization solutions. Afterwards I present different methods which are suitable for femtocell based 5G networks focusing on the RIBS method.
In Capter 3 I demonstrate a Matlab-based simulation environment which is considered as a base of the investigation used in the next chapter.
In Chapter 4 I present SIR, timing and frequency error measurements and their results. The simulations apply different channel- and fading models to understand the behavior of the mentioned quality properties.
Finally, in Chapter 5 I summarize the results of the simulations and conclude based on the operating and behavior of RIBS technique.