Conflict in mapping the MBSFN reference signals in MATLAB R2016b and MATLAB R2018b.

I have a question about Multimedia Broadcast multicast service Single Frequency Network (MBSFN). The MATLAB documentation on transmission modes and transmission schemes shows that there is MBSFN at TM9 and TM10 only, with port 7.

To get the documentation page in MATLAB R2016b and R2018b, execute the following command:

web(fullfile(docroot, 'lte/ug/transmission-modes-and-transmission-schemes.html'))

However, the MBSFN reference signals are mapped to port 4 as shown in the following link.

https://www.sharetechnote.com/html/FrameStructure_DL.html#RS_UE_Specific

But I didn't see any TxScheme for Port 4 in the documentation on the 'ltePDSCH'.

To get the documentation in MATLAB R2016b, execute the following command:

web(fullfile(docroot, 'lte/ref/ltepdsch.html#ltePDSCH.TxScheme'))

For MATLAB R2018b, access the documentation page by running the following command:

web(fullfile(docroot, 'lte/ref/ltepdsch.html'))

How can I get the MBSFN reference signals port 4 with MATLAB 2016b or MATLAB R2018b?

Answer 1

[MathWorks Support Team]

I understand that you are encountering an issue where Antenna Port 4 cannot be mapped using the "ltePDSCH" function with the "TxScheme" property. The reason you cannot map to Antenna Port 4 is due to the specifications in the LTE Standard. Specifically, this is outlined in 3GPP Spec #36.211, as indicated by the following link you have provided.

https://www.sharetechnote.com/html/FrameStructure_DL.html#RS_UE_Specific

Additionally, the following PDF file on page 78 states that, "MBSFN reference signals shall be transmitted only when the PMCH is transmitted. MBSFN reference signals are transmitted on antenna port 4." Click on the following link to access the PDF file. 

https://www.etsi.org/deliver/etsi_ts/136200_136299/136211/10.00.00_60/ts_136211v100000p.pdf (Page 78).

 

However, PMCH (Physical Multicast Channel) is not the simulation target for the 'ltePDSCH' function. Instead, the 'ltePDSCH' function simulates the 'Physical Downlink Shared Channel' (PDSCH). In this case, the relevant specifications can be found in the following references to the research articles.

[1] 3GPP TS 36.101. "User Equipment (UE) Radio Transmission and Reception." 

3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA)

. URL: 

https://www.3gpp.org/

.

[2] 3GPP TS 36.141. "Base Station (BS) conformance testing." 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA). URL: https://www.3gpp.org/ .

In addition, the "ltePDSCH" function fully conforms with the appropriate specifications.

For more information, you can execute the following commands in MATLAB R2016b and R2018b:

web(fullfile(docroot, 'lte/ref/ltepdsch.html'))

Please follow the below link to search for the required information regarding the current release:

https://www.mathworks.com/help/