Time Division-Synchronous (CDMA; a CDMA variant developed by Chinese vendors that is claimed to offer high data rates and greater coverage.

Time division synchronous code division multiple access. A unique 3G wireless standard under development in China for use inside China. The spectral efficiency of radio systems is three to five times higher than that of GSM. Return

Siemens developed this special transmission method for UMTS together with the China Academy of Telecommunications Technology (CATT). TD-SCDMA is to be used for setting up UMTS mobile phone networks in China. It combines the SCDMA technique developed by CATT with the TD-CDMA method proposed by Siemens and other manufacturers. The S in 'SCDMA' refers to the special synchronous mode: All radio base stations transmit and receive synchronously: they prevent unavoidably occurring feedback interferences with asynchronous radio methods. An advantage of the TD-SCDMA technique is that it is also suitable for unpaired frequency ranges (frequencies, duplex separation).

TD-SCDMA stands for Time Division – Synchronous Code Division Multiple Access. TD-SCDMA is a third generation mobile telephony standard developed by CATT (China Academy of Telecommunications Technology) in collaboration with Datang and Siemens. TD-SCDMA enables surfing the Internet at a speed of up to 2 Mbit/s, or 35 times faster than an ordinary 56k modem and telephone line link. It also allows supremely efficient use of the infrastructure.

Time Division-Synchronous Code Division Multiple Access. A third-generation, (3G) wireless standard that offers enhanced voice and data capacity and higher data rates than previous second generation wireless standards. One of the three international CDMA technology-based standards accepted by the ITU for third-generation wireless communications. See Also: ITU, 3G

TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) is a 3 G mobile telecommunications standard, being pursued in the People's Republic of China by the Chinese Academy of Telecommunications Technology (CATT), Datang and Siemens AG, in an attempt to develop home-grown technology and not be "dependent on Western technology" http://www.tdscdma-forum.org/nenglish/articles/article20030418.2.html. This is likely primarily for practical reasons, both current 3G formats may require the payment of patent fees to Qualcomm and UMTS requires license fees from the primarily European-based 3G consortium. It is based on spread spectrum CDMA technology which makes it unlikely that TD-SCDMA will be able to completely escape payment of CDMA license fees to Qualcomm.