I would like to express my sincere thanks to Dr. Suthep Nimsai for help of this report. I am most grateful for her teaching and advice, not only the report methodologies but also many other methodologies in life.
In addition, I am grateful for the teachers of telecommunication engineering: Asst. Prof. Dr. Rangsan Wongsan, Dr. Rangsan Tongta, and others person for suggestions and all their help.Finally, I most gratefully acknowledge my parents and my friends for all their support throughout the period of this research.