3G standards, the International Telecommunications Union (ITU) has currently determined the world's four major 3G standards, which are WCDMA, CDMA2000, TD-SCDMA and WiMAX.
W-CDMA, also known as WCDMA, the full name is Wideband CDMA, also known as CDMA Direct Spread, which means wideband code division multiple access. This is a 3G technical specification developed based on the GSM network. The broadband CDMA technology proposed by Europe is basically the same as the broadband CDMA technology proposed by Japan, and is currently being further integrated.
CDMA2000, a broadband CDMA technology developed from narrowband CDMA (CDMA IS95) technology, also known as CDMA Multi-Carrier, was proposed by Qualcomm North America, with Motorola, Lucent and South Korea later joining Samsung is involved, and South Korea is now the leader in the standard.
TD-SCDMA, the full name is Time Division - Synchronous CDMA (Time Division Synchronous CDMA), this standard is a 3G standard independently developed by mainland China.
WiMAX, the full name is Worldwide Interoperability for Microwave Access, also known as 802·16 wireless metropolitan area network, is another "last mile" solution for enterprise and home users. ” broadband wireless connectivity solution.