说明：  本书是由Standford大学教授Andrea Goldsmith毕生所著的经典教材。现在仍为美国各大院校的通信工程专业必修课教材之一。
(This book is written by Professor Andrea Goldsmith, Standford University for his life, and it is a classic textbook. Now it is one of the textbook for most of the institutions in the United States as the compulsory reading for communication engineering major.)