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NR Cell Search and MIB and SIB1 Recovery version difference

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I updated from R2022b to R2023b prerelease.
And we've seen some SIB1s that fail in R2022b succeed in R2023b.
Can you tell me what changed from R2022b to R2023b?
R2022b ------------------------------------------------------------
-- Downlink control information message search in PDCCH --
Decoded PDCCH candidate #1 at aggregation level 4
PDCCH RMS EVM: 3.802%
PDCCH CRC: 0
-- PDSCH demodulation and DL-SCH decoding --
PDSCH RMS EVM: 38.883%
PDSCH CRC: 1 SIB1 decoding failed.
R2023b prereleass ------------------------------------------------------------
-- Downlink control information message search in PDCCH --
Decoded PDCCH candidate #3 at aggregation level 4
PDCCH RMS EVM: 3.901%
PDCCH CRC: 0
-- PDSCH demodulation and DL-SCH decoding --
4000002464014044280028000000000000
PDSCH RMS EVM: 23.683%
PDSCH CRC: 0
SIB1 decoding succeeded.

Accepted Answer

Jongmin Kim
Jongmin Kim on 14 Jul 2023
Thank you for your answer.
I tried running example files from 2023b prereleass on 2022b.
but it didn't work.
Accordingly, I believe that there are additional changes in addition to the example files provided.
I will contact the engineer as suggested.
thank you

More Answers (2)

Song-Hyun Ji
Song-Hyun Ji on 14 Jul 2023
Edited: Song-Hyun Ji on 14 Jul 2023
Did you use signal created by "NRDownlinkWaveformGenerationExample.m" in '5G NR Downlink Vector Waveform Generation' instead of the signal in 'capturedWaveformSIB1.mat' to create a static signal or read a signal from a file as the option in 'NR Cell Search MIB and SIB1 Recovery'?

Jongmin Kim
Jongmin Kim on 14 Jul 2023
I'm not generating the waveform in matlab, I'm analyzing the data from the base station. We use loadFromFile = 1 in the example.
Based on the waveform standards of new base stations recently, SIB1 cannot be recognized in 2022b and can be recognized in 2023b.
Is this a code change due to a change in the 3GPP specification? Or is it an improvement of matlab code?
  1 Comment
Song-Hyun Ji
Song-Hyun Ji on 14 Jul 2023
As you noticed, we improved quite the MATLAB code for ‘NR Cell Search and MIB and SIB1 Recovery’ when comparing the script between R2022b and R2023b. I could not find a code change for a change in the 3GPP specification in the example. If you want to get an exact answer, please contact the Technical Support team with the reproducible sample files.

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