top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration

Facebook Login
Site Registration

Why sub carrier spacing is more for wifi than lte

+1 vote
195 views
Why sub carrier spacing is more for wifi than lte
posted Feb 29, 2016 by Shyam Narayan

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

I thinks it is because of orthogonal frequency usages in LTE which make sure at any point of time only one sub-carrier can be at peak. Which minimizes the sub-carrier frequency interference.
Let others comment if anyone has some extra information.

answer Feb 29, 2016 by Salil Agrawal
In LTE , cellular signal coverage is more, so more delay spread-> More ISI-> More freq selective fading due to less coherence BW. Coherence BW is inversely proportional to delay spread.  
To make channel freq flat channel, sub-carrier BW must be less than coherence BW

In wifi , delay spread is less due to less area coverage
Similar Questions
+1 vote

I know 15 Khz spacing is used between between two sub carrier. From where this 15 Khz is derived ?
What things are considered to calculate this number ?

+1 vote

As far as I studied, I know following options that can be used for LTE and Wifi interworking:
1- LTE - U (LTE Unlicensed)
2. LAA (Licensed Assisted Access)
3. LWA (LTE wifi aggregation)
4. MPTCP (Multi path TCP)

Out of above options, there might be other options which I don't know. But out of above four which one is best and due to what reason operator will choose the best one ?

+1 vote

Using Wi-Fi direct, I've been able to connect two devices together and pass messages between them. However, when I try to have a third device connect to this group, the WFD connection between the first and second devices either drops, or the third device seems to be ignored.
I haven't been able to find anything specific about one-to-many connections in the documentation. Do they need to be handled in a special way?

Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Bangalore-560102
Karnataka INDIA.
QUERY HOME
...