Hello All.
Does anyone can explain this sentence:
“Larger spacing => larger total bandwidth => higher bit rate”
I think last phrase is not correct.
As the SCS increase, the TTI gets shorter.
So overall is same throughput.
I agree with you! Thanks.
I was thinking about this issue for a long time.
It’s disguised in the number of cycles.
So, in LTE, you have fixed 66.66us spacing no matter which band you are using.
There is no gain with an increase in the number of cycles while you are using a 700 MHz channel or a 3500 MHz channel.
In 5G, sub-carrier spacing can be from 15 kHz / 30 kHz / 60 kHz /120 kHz / 240 kHz, using ‘advantage’ proportional to number of cycles/sub-carriers.
Think of ‘packing capacity’ in spite of ‘spacing’.
Keeping other dimensions unchanged, a 3500MHz channel has 5 times more ‘packing capacity’ theoratically compared to the same bandwith 700 Mhz.
But it’s not just this advantage, 5G is not merely a cellular technology.
It’s a backbone of multiple services from URLLC(larger spacing) to m2m/iot(short one) services.
You select it according to band and service type(manually as well as dynamically).
Completely clear now.
Thank you!
If you compare data throughput per second, then statement is correct as in a shorter symbol duration you are sending same amount of data.
Actually not, in shorter symbol duration it is used half of the PRBs as the SCS increase