WCDMA mainly originated from the early third-generation wireless research activities in Europe and Japan, and the great success of GSM had a great impact on the standardization of the third-generation system in Europe. In Europe, the RACE (European Advanced Communication Technology Research) program started from 1988 and lasted until1June 992, representing the beginning of the third generation wireless research activities. The RACEⅱII ii program started in Europe 1992- 1995. ACTS (Advanced Communication Technology and Service) was established at the end of 1995, and proposed FRAMES (Future Wireless Broadband Multiple Access System) scheme for UMTS (universal mobile telecommunications system). In these early studies, various access technologies, including TDMA, CDMA and OFDM, were tested and evaluated. It laid a technical foundation for WCDMA.
As a new technology, WCDMA is also derived from the practice and application of CDMA technology. WCDMA is rapidly sweeping the world and has occupied 80% of the wireless market. By the end of 20 13, the number of WCDMA users in the world had exceeded 3.6 billion, and 156 operators in 70 countries had commercialized 3GWCDMA services.