In the journey that led to the creation of the work presented in this thesis, I have been guided, helped and supported by many. This is my opportunity to thank them for everything they have done for me. First and foremost, I am deeply indebted to my advisor Prof. Hakan Ferhatosmanoglu, for teaching me the principles of good research. His dedication and enthusiasm towards research is truly inspirational. He has been an excellent mentor and guide throughout my Master"s program. I would also like to thank Prof. Gagan Agrawal for agreeing to be on my Master"s Thesis Committee and for all the valuable suggestions he has made. Special thanks to Dr Engin Demir and David Fuhry for helping me through all stages of my research. I am forever obliged for their immense patience and valuable insights. I will always look back on our fierce brain-storming sessions with great pride.