Cellular 3G Technology Vs 4G Technology

4G technology is with us already in some cities. What can 4G bring us?

The following table shows comparisons between some key parameters of 3GVs possible 4Gsystems.

 

Item	3G	4G
Frequency Band	1.8 – 2.5 GHz	2 – 8 GHz
Bandwidth	5-20 MHz	5-20 MHz
Data rate	Up to 2Mbps ( 384 kbps WAN)	Up to 20 Mbps or more
Access	Wideband CDMA	Multi-carrier-CDMA or OFDM(TDMA)
FEC	Turbo-codes	Concatenated codes
Switching	Circuit/Packet	Packet
Mobile top speeds	200 kmph	200 kmph

 In the next topics, we mainly discuss the 4g terminal and 3g terminal comparasion, especially the 4g lte router and 4g lte modem.