MATLAB Answers

5G Waveform Spectral Analysis and use for 5G transmission.

3 views (last 30 days)
Cristian Alistarh
Cristian Alistarh on 14 Jun 2018
Answered: Sriram Tadavarty on 5 Jan 2021
Hi there,
I have been playing with the 5G NR library which is added to the LTE toolbox and I am delighted to see that it is possible to create different kinds of waves for the transmission (i.e. modify sub-carrier spacing, RBs even frequency of transmission).
My problem is that when I try and add a waveform with the 5G LTE end-to-end simulation it fails to adapt to the LTE specifications. To be precise, I model a waveform with the functions found in the 5G Waveform Spectral Analysis section:
signal_clipping = false;
my_n = 3;
subcarrierSpacing = 2.^my_n*15; % in kHz
NDLRB = 270;
[~, signal_spectrum, signal_freq] = generate5GWaveform('W-OFDM',NDLRB,subcarrierSpacing, signal_clipping);
From this I would have to find the gnb by applying the lteRMCDL function, but this will obviously give me an error since the LTE will limit the NDLRB to 110.
Similarly I would need the PDSCH.HARQProcessSequence after I have applied the lteRMCDLTool. Again, I would have the same problem since NDLRB = 270.
I know that the LTE standard is set with the fixed numerologies (I cannot downgrade the 5G waveform to LTE functions), but there are no functions for the 5G library which will provide the information set for transmission? Any suggestions on how to model this information myself?
Thank you very much for your time.
All the best, Cristian

Answers (1)

Sriram Tadavarty
Sriram Tadavarty on 5 Jan 2021
Hi Christian,
I am not sure, if you are still working of that library.
Just for information, to create 5G waveforms, use 5G Toolbox, which has a lot of features that provide the required set.
Regards,
Sriram

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!