Direction-of-arrival Estimation of Wideband Sources Using Sensor Arrays

To my family. My father and mother. Especially, to my beloved wife Ji-Hyun and my precious Catherine. iii ACKNOWLEDGEMENTS When I came to Georgia Tech, I used to imagine the moment when I graduate and thought that it would take forever to finish my graduate work. Since then, five years passed fast and I have finished my thesis. While I was writing this thesis, I could not help thinking that it would not be possible to finish my PhD work if it were not for help from my family, my advisors and my friends. I owe them everything that I could have done during my years at Georgia Tech. First of all, I'd like to thank my advisor Prof. James McClellan. He is not only the best advisor that I have seen but also a role model as a researcher and a teacher to me. His intuition to see and solve a problem was amazing to me and it was a big pleasure to be advised by him. Prof. Lance Kaplan, my co-advisor, was always there to help me when I was in trouble or when I don't know what to do. He was always willing to help me and waited for me patiently until I found solutions by myself. Tech, I was lucky enough to have all those good colleagues. Volkan Cevher. I used to share hotel rooms with him whenever we went to conference. Mubashir Alam. He helped me a lot for acoustic data processing. Sam Li. He always smiled at me and was willing to help me. Matt Cobb. I used his program in the first work that I did here. Seung-mok Oh. He and I graduated from same undergraduate school in Korea. He helped me in everything when I settle down. Sometimes, I used to waste his time by asking a favor. I'd like to thank him here. I feel kind of sorry that I cannot say more than 'thank you' to my parents. They supported me in every way and gave me a chance to study at Georgia Tech. I give my special thank to my wife, Ji-Hyun. She is not only my lovely wife but also my friend, a best mother to Catherine, and everything. I would say that the PhD degree is earned by her, not me. I wish I could say everyone's name here who helped me while I was staying at …