e DM-RS associated with the PUSCH is based on OFDM modulation, the DM-RS reference sequence is a Gold sequence generated by the formula: At the start of each subframe, the initial value Cinit of the pseudo-random sequence is calculated from the following formula: with N's, as the number of slots in the frame and 1 as the number of OFDM symbols in the slot. The parameter ns is equal to 0 or 1. The values n°ID and n/10 are either given by the RRC layer with the scramblingID0 and scramblingIDI parameters, or take the value of the physical identity of the PCI cell. The PCI identity is recovered at the end of the time synchronization of the mobile. a is the CDM coding group, taking the value of 0.1 or 2 and n2 is equal to 0 or 1. The number of DM-RS symbols and mapping to resource elements (RE) are statically configured by RRC parameters, or dynamically by control information (DCI). The physical DM-RS is present on each RB of the slot where the PUSCH is allocated. 5G-NR Radio Interface - The Physical Layer The mapping type is used to indicate the position S of the first OFDM symbol of the DM-RS and the number L of symbols: - DM-RS Mapping Type A is based on the slot time interval. L is the time between the first OFDM symbol of the slot and the last OFDM symbol of the PUSCH; - DM-RS Mapping Type B, L is the duration of the allocated PUSCH resources. If frequency hopping is off, L is the duration of the hop. The DM-RS is time aligned with the PUSCH. The position of the DM-RS associated with the PUSCH is determined by the Pos value. The mapping is transmitted in the DCI format 0-0 or 0-1 message. Like the mapping for the uplink, Type B mapping is used for mini-slots. At a minimum, one DM-RS symbol per UE is transmitted per slot, but depending on the RRC configuration, additional DM-RS symbols per slot may be added (dmrs-AdditionalPosition) in the time domain. The DM-RS is transmitted on one symbol (Single Symbol) or on two symbols (Double Symbol) per slot, depending on the maxlength parameter transmitted via the RRC sign