SINR and CQI

[ns3user]

I got DlRsrpSinrStats.txt file.
how can convert sinr column value into dB ?
I have to decide UE's CQI based on SINR(db) so how can do this?
Could you please provide some help?

Thanks a lot,

[Rob Kers]

For RSSI see,
see https://groups.google.com/forum/#!topic/ns-3-users/IhDgZiwDcn4

For CQI, as far as I know, there is no direct relation between SINR and
CQI. In the sense that it is not some scalar or conversion that is straight
forward. You'll have to measure the noisiness of your channel. What
relation would you have between SINR and CQI? It might be that it is build
in, into the module that you are using (which is?). That would be your best
shot I guess.

Cheers

Post by ns3user
I got DlRsrpSinrStats.txt file.
how can convert sinr column value into dB ?
I have to decide UE's CQI based on SINR(db) so how can do this?
Could you please provide some help?
Thanks a lot,

[Mandavi Dubey]

Thank you so much for your reply.

According to ns3 Documentation I have convert SINR into dB but only in
gnuplot not in .txt file. I have find (DlRsrpSinrStats.txt,
UlSinrStats.txt) files and i want change sinr column value in dB. i know i
have to use (10log(linear value of SINR)) but where i can use this formula.
mean on runtime or .cc file, after conversion of sinr into dB then i have
to decide UE's CQI based on SINR (dB) how can do this? last question is
that why SINR value is different in both .txt files.

Thank you

For RSSI see, see
https://groups.google.com/forum/#!topic/ns-3-users/IhDgZiwDcn4
For CQI, as far as I know, there is no direct relation between SINR and
CQI. In the sense that it is not some scalar or conversion that is straight
forward. You'll have to measure the noisiness of your channel. What
relation would you have between SINR and CQI? It might be that it is build
in, into the module that you are using (which is?). That would be your best
shot I guess.
Cheers

Post by ns3user
I got DlRsrpSinrStats.txt file.
how can convert sinr column value into dB ?
I have to decide UE's CQI based on SINR(db) so how can do this?
Could you please provide some help?
Thanks a lot,
--

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[Rob Kers]

I think you have to come up with a formula that converts SINR to CQI based
on that table. I have no clue how to do that.

If you have that formula, you could use it in your sourcefile (.cc file).

Post by Mandavi Dubey
Thank you so much for your reply.
According to ns3 Documentation I have convert SINR into dB but only in
gnuplot not in .txt file. I have find (DlRsrpSinrStats.txt,
UlSinrStats.txt) files and i want change sinr column value in dB. i know i
have to use (10log(linear value of SINR)) but where i can use this formula.
mean on runtime or .cc file, after conversion of sinr into dB then i have
to decide UE's CQI based on SINR (dB) how can do this? last question is
that why SINR value is different in both .txt files.
Thank you

For RSSI see, see
https://groups.google.com/forum/#!topic/ns-3-users/IhDgZiwDcn4
For CQI, as far as I know, there is no direct relation between SINR and
CQI. In the sense that it is not some scalar or conversion that is straight
forward. You'll have to measure the noisiness of your channel. What
relation would you have between SINR and CQI? It might be that it is build
in, into the module that you are using (which is?). That would be your best
shot I guess.
Cheers

Post by ns3user
I got DlRsrpSinrStats.txt file.
how can convert sinr column value into dB ?
I have to decide UE's CQI based on SINR(db) so how can do this?
Could you please provide some help?
Thanks a lot,
--

Posting to this group should follow these guidelines
https://www.nsnam.org/wiki/Ns-3-users-guidelines-for-posting
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