The statement "The start symbol of a front-loaded DMRS of a type B PDSCH is always the first symbol
of PDSCH" is incorrect. In 5G NR, the start symbol of a front-loaded DMRS of a type B PDSCH can be
configured as the first symbol of PDSCH or as the second symbol of PDSCH.
You can refer to the Huawei official documentation for HCIP-5G-RAN V2.0 certification and the 3GPP
5G NR standard (38.211, 38.212, 38.213) for more information on PDSCH DMRS, including the
configurations of the front-loaded DMRS, the DMRS symbols and the optional and mandatory nature
of it.
Here are some official
