This book is the product of over 15 years of working with RTT, delivering strategic technology design programs for the cellular design community. This has included pro- grams on AMPS/ETACS handset, base station, and network design in the early to mid-1980s; programs on GSM handset, base station, and network design from the late 1980s to mid-1990s onward; and, more recently, programs on 3G handset, Node B, and network design.