(3G standard
1) TD is a TD-SCDMA independently developed by China.
TD-SCDMA means time division-synchronous code division multiple access access in Chinese, and this communication technology also belongs to a technical standard of wireless communication. It was first put forward by China, and cooperated with the international community on the basis of this radio transmission technology (RTT) to complete the TD-SCDMA standard and become CDMA.
As a member of the TDD standard, this is a pioneering work in the field of mobile communication in China, and it is also China's contribution to the development of the third generation mobile communication. In the competition with 3G standards proposed by Europe and America respectively, TD-SCDMA proposed by China officially became one of the global 3G standards, marking China's entry into the world leading position in the field of mobile communication. The main technology of this scheme is concentrated in the hands of Datang Company, and its design refers to the TDD (Time Division Duplex) time domain mode of unpaired frequency bands.