Contents 1. 2. 3. 4. 5. 6. 7. Overview System Technical Features Physical Layer of TD-SCDMA System Networking Structure Random Access Process of Mobile Users Comparison of TD-SCDMA WCDMA CDMA2000 Interface What We Can Do 2006CNTTR. All Rights Reserved. I. Overview q Overview vvvv TD-SCDMA (Time Division-Synchronous CDMA) is a time division synchronous CDMA system. The system design integrates multiple access modes such as SCDMA/TDMA/FDMA. At the same time, through the application of smart antennas, the purpose of space division multiple access can be achieved. The system adopts the working mode of time division duplex (TDD), that is, the same carrier frequency is used for uplink and downlink, and different time slots are used for user information exchange. The 3G mobile communication technology adopted is mainly reflected in the use of smart antennas (Smart Antenna), synchronous CDMA (Synchronous CDMA), software radio (Software Radio), dynamic allocation of channels, relay switching technology, multi-user detection and other technologies. 2006CNTTR. All Rights Reserved. System basic parameters and features 1q Basic parameters and features v Working frequency band TDD working frequency band Available working frequency band: 1900MHz~1920MHz; 2010MHz~2025MHz. TDD extended frequency band: 1880~1900 MHz; 2300~2400 MHz. According to ITU regulations, TD-SCDMA uses the frequency range of 2010MHz~2025MHz, and the channel number is: 10050~10125. TD-SCDMA working frequency band v Working bandwidth: 15MHz, a total of 9 carriers, each 5 MHz contains 3 carriers. v Channel number: The corresponding relationship between the channel number and the carrier center frequency: Ni=5F, where F is the carrier center frequency, 0.0≤F≤3276.6MHz. 2006CNTTR. A……
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