ALLAN R. HAMBLEY received his B.S. degree from Michigan Technological University, his M.S. degree from Illinois Institute of Technology, and his Ph.D. from Worcester Polytechnic Institute. He has worked in industry for Hazeltine Research Inc., Warwick Electronics, and Harris Government Systems. He is currently Professor of Electrical Engineering at Michigan Tech. The Michigan Tech chapter of Eta Kappa Nu named him the Outstanding Electrical Engineering Teacher of the Year in 1995. He has won the National Technological University Outstanding Instructor Award six times for his courses in communication systems. The American Society for Engineering Education presented him with the 1998 Meriam Wiley Distinguished Author Award for the first edition of this book. His hobbies include fishing, boating in remote areas of Lake Superior, and gardening.