How 4G has less BW compare to 3G BW but it achieves more data rate,

Question

if you look into 5G BW it is huge than 4G why is that required,if you can achieve more data rate in less BW why do we need more BW in 5G

Answer 1

Hi Ankit, the term "more data rate" you used in your question is generic. It might be possible for few application 100 Mbps is good but few application might required 500 Mbps or even more than that. 5G is not only for handled device it is more than what we use today. In our day to day life, we came across various moments where we need a network which can deliver high data rate for delay sensitive application.
Apart from bandwidth, radio access technologies also play a major role to improve data throughput. 3G was using W-CDMA radio access mechanism while 4G uses O-FDMA as radio access. By using O-FDMA, more data can be sent over the radio compare to W-CDMA.

Comments

you meant to say data rate is not directly proportional to BW, it is depends on multiple accessing (like OFDMA ,WCDMA) techniques am i right?then in this case which multiple accessing technique 5G uses?