MATLAB: Where is the DMRS Type A Mappings symbol length defined in the 5G NR PDSCH Throughput Example

5GcommunicationLTE Toolboxnewpdschradio

I am following the NR PDSCH Throughput Example as present in the following MATLAB documentation(R2019a):
https://www.mathworks.com/help/releases/R2019a/5g/examples/nr-pdsch-throughput.html?searchHighlight=hPDSCHResources.m&s_tid=doc_srchtitle#responsive_offcanvas
In the "hPDSCHResources.m" Appendix File, it appears that the DMRS Type A mappings are defined correctly, but I don't know their symbol length.
Where can I see the defined symbol length ?

Best Answer

  • You can open the NR PDSCH Throughput example with the following command in the Command Window of MATLAB R2019a:
    >> openExample('5g/NewRadioPDSCHThroughputExample')
    Open the "hSharedChannelResources.m" file and you will be able to see that if we have Type A Mapping, the symbol length is redefined correctly (mentioned as "DMRSLength").  
    This is the same way that the 3GPP Standard 36.211 Section 7.4.1.1.2 defines symbol length for Type A Mappings.