W-CDMA

Wideband Code Division Multiple Access is an air interface standard found in 3G mobile telecommunications networks. It is the basis of Japan’s NTT DoCoMo’s FOMA service and the most-commonly used member of the UMTS family and sometimes used as a synonym for UMTS. It uses the DS-CDMA channel access method and the FDD duplexing method to achieve higher speeds and support more users compared to most TDMA and TDD schemes used before.