Detailed explanation of 3G
２－A ０２ｋ００２３ Yuya Tanaka
Table of Contents
1.What system is there in 3G ? 2.Speed of each system 3.The different of 3G between present and the future 4. A future cellular phone system
1.What system is there in 3G ?
FOMA(Freedom Of Mobile multimedia Access) CDMA2000(Code Division Multiple Access-2000)
IMT-2000(International Mobile
Telecommunications-2000)
W-CDMA(Wideband-Code Division Multiple Access)
CDMA 1x(Code Division Multiple Access 1x)
2.Speed of each system
a walk time FOMA 384kbps 144kbps 2Mbps
2Mbps 2GHz
a high-speed a stillness time data time
a circuit waveband
CDMA2000 384kbps
IMT-2000
W-CDMA CDMA 1x
384kbps 144kbps
(2Mbps)
64kbps 1.25MHz
3.The different of 3G between present
and the future
The early analog cellular phone ↓ By using the frequency from which each terminal differs, simultaneous transmit communication was made possible. On the other hand, in CDMA
↓
While all terminals shared the same frequency, the unique digital code was assigned to each terminal which communicates.
4. A future cellular-phone system
Transmit and receive more nearly
prolonged animation mail. Mentioned the schedule function interlocked with the personal computer. The television reception function Harmony to wireless LAN