s to 3GPP. Among them, three proposals have been accepted by ITU, seven by 3GPP, and one by 3GPP2 UMB release v2.0. Such work has pushed the evolution of the 3G technology, including TD-SCDMA, and laid the founda- tion of developing next-generation wideband wireless mobile communication technologies and participating in international competition on behalf of China. Additionally, the FuTURE TDD special working group plays an active role in the FuTURE Forum and maintains several documents about wireless trans- mission technology, spectrum management, radio resource management, and network structure. The successful implementation of the FuTURE TDD system indicates that China is now in an advantageous position in the research and development process of the 4G Mobile Communication System. Based on this platform, commercial products can be developed to enter the R&D services market of wideband mobile communication technology and realize new types of multimedia services impos- sible before, such as the HDTV and super-high-speed download services. It will provide strong support for the successful development of the Chinese mobile com- munications industry and national socioeconomic level. The key technologies in the FuTURE TDD system can greatly improve the performance of high-speed wideband wireless access for users and are valuable to improving people's cultural lives, with the result of bringing positive social benefits. 2.3 TD-SCDMA, LTE, and FuTURE TDD TD-SCDMA was proposed by the Chinese Academy of Telecommunication Technology (CATT) in 1998, accepted by the ITU as a 3G standard in November 1999, and accepted by the 3GPP as the low chip rate (LCR) TDD mode of universal terrestrial radio access (UTRA) in March 2001. TD-SCDMA has adopted many advanced technologies, such as synchronous CDMA, smart antenna, joint detec- tion, SDR, baton handover, and dynamic channel allocation (DCA). TD-SCDMA originated in China and is strongly supported by the Chinese government. It is one member in the 3G family. LTE is a project lau