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NR Cell Search and MIB and SIB1 Recovery version difference

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Jongmin Kim
Jongmin Kim 2023-7-12
编辑： Song-Hyun Ji 2023-7-14
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.

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采纳的回答

Jongmin Kim
Jongmin Kim 2023-7-14
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

更多回答（2 个）

Song-Hyun Ji
Song-Hyun Ji 2023-7-14
编辑：Song-Hyun Ji 2023-7-14
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 2023-7-14
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 个评论
Song-Hyun Ji
Song-Hyun Ji 2023-7-14
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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