Prof. Fan Changxin was born in Beijing, China, in 1931. He received his BSc. Degree from Peking University in 1952. Since then he has been working in Xidian University, China, in the area of communications and signal processing. Currently, he is an advisor for Ph. D. students in Xidian University, a member of Radio Frequency layout consultant committee, Ministry of Information Industry, China. His pioneer work in analogue and digital communication systems helped to accomplish China's several important communication infrastructure projects. He authored several important textbooks in the areas of digital communications and communications systems contributed greatly to the higher education in Chinese universities and graduate schools, which remains to be the best seller in China now. Professor Fan is holding numerous important academic positions in China, such as a Fellow of China Communication Society, a Fellow of Chinese Electronics Society, a Fellow of IEE and a Fellow of IEEE. He was the Chair of the academic committee of China National Key Laboratory on Integrated Services Networks, and the Chair of IEEE Xi’an Sub-section of China, and is currently a member of IEE International Membership Advisory Committee. He has been a visiting Professor to UCLA, UCSB, University of Colorado, and University of Surry.