 for time index l and the reference position lo of the first DM-RS symbol depends on the mapping type, which for PDSCH mapping Type A, l is defined relative to the start of the slot, that is, lo = 3 if the RRC parameter dmrs-TypeA- Position equals 3; otherwise, lo = 2 and for PDSCH mapping Type B, l is defined relative to the start of the scheduled PDSCH resources, that is, lo = 0. The position of the DM-RS symbols is further dependent on parameter I where for PDSCH mapping Type A, the dura- tion is between the first OFDM symbol of the slot, and the last OFDM symbol of the scheduled PDSCH resources in the slot; and for PDSCH mapping Type B, the duration is the number of OFDM symbols of the scheduled PDSCH resources given by the para- meters specified in [6]. For PDSCH mapping Type B, if the PDSCH duration is 2, 4, or 7 OFDM symbols (i.e., mini-slot scheduling), and if the PDSCH allocation collides with resources reserved for a New Radio Access Physical Layer Aspects (Part 2) 423 CORESET, I is incremented such that the first DM-RS symbol is located immediately fol- lowing the CORESET. If PDSCH duration is 2, 4, or 7 symbols, the UE would not expect to receive a DM-RS symbol beyond the second, third, and fourth symbol, respectively. If one additional single-symbol DM-RS is configured, the UE expects the additional DM-RS to be transmitted on the fifth or sixth symbol when the front-loaded DM-RS symbol is in the first or second symbol, respectively; otherwise, the UE should expect that the additional DM-RS is not transmitted. If PDSCH duration is two or four OFDM symbols, only a single- symbol DM-RS is supported. Furthermore, single-symbol or double-symbol DM-RS is used, if RRC parameter maxLength is equal to 1 or 2, respectively [8,9]. In the absence of CSI-RS configuration, the UE can assume PDSCH DM-RS and SS/PBCH block antenna ports are quasi-co-located with respect to Doppler shift, Doppler spread, aver- age delay, delay spread, and spatial RX 2 parameters. The UE may assume that the PDSCH DM-RS within the same 