Code division multiple access (CDMA) and hybrid CDMA are discussed in this book as they apply to wireless personal communications. Hybrid CDMA is defined as a combination of any two types of CDMA (e.g., direct sequence DS and frequency hopping FH) or CDMA with any other contention (e.g., ALOHA) or contentionless (e.g., time division multiple access, TDMA) multiple access protocols or CDMA with any other techniques (e.g., interference cancellation IC, joint detection JD) are introduced to enhance the performance of a wireless personal communication system CDMA is treated here from the point of view of multiple access protocol. Therefore a separate chapter is devoted to multiple access protocols. This is the first book to give a broadtreatment to CDMA as a multiple access protocol for a wireless channel.