TD-LTE is the TDD version of LTE technology, and FDD-LTE technology is the FDD version of LTE technology. TD-SCDMA is CDMA (Code Division Multiple Access) technology, while TD-LTE is OFDM (Orthogonal Frequency Division Multiplexing) technology. They are different in coding and decoding, frame format, air interface, signaling and network architecture.
FDD-LTE adopts frequency division duplex, while TD-LTE adopts time division duplex.
Frequency division duplex: Uplink and downlink transmit on different frequencies respectively.
Time division duplex: Uplink and downlink transmissions are carried out on the same frequency.
TD-LTE, as an important opportunity in the transition period of communication industry, mainly includes three characteristics:
1. It contains a large number of patents from China, led by China, and has gained extensive international support and become an international standard;
2. Fast Internet access, which can reach dozens of times that of TD-SCDMA technology, making it possible to access the Internet at high speed everywhere;
3. The rapid development of the industry has basically achieved the synchronous development with other international mobile broadband technologies, representing the most advanced level of the mobile communication industry in the world today.