Why is Unicom's WCDMA network speed so fast?

the full name of p>WCDMA is wideband code division multiple access, also known as direct spread spectrum wideband code division multiple access, which is the third generation mobile communication system based on GSMMAP core network and UTRAN(UMTS terrestrial radio access network) as wireless interface. It has the following characteristics:

base station synchronization mode: supporting asynchronous and synchronous base station operation

carrier frequency bandwidth: 5MHz

chip rate: 3.84Mcps

multiple access mode: CDMA+TDMA+FDMA

duplex mode: FDD

transmit diversity mode: TSTD, STTD and fbtd < Downlink: QPSK

power control: uplink and downlink closed-loop power control+open-loop power control (WCDMA fast power control: WCDMA power control speed can reach 15 times/second)

demodulation mode: pilot-assisted coherent demodulation

voice coding mode: AMR

WCDMA, as the most competitive 3 technologies in the world, makes China Unicom 3G network have obvious technical competitiveness and users can experience it better. Globally, WCDMA's sustained high-speed user demand growth can support China Unicom to continue to grow bigger and stronger. China Unicom established the first brand of mobile broadband with WCDMA, absorbed high-end users from other networks to switch networks, improved the user structure, raised ARPU value, and established a new image of China Unicom.