Method for demodulation reference signal configuration and resource mapping

A method of wireless communication at a user equipment (UE), comprising:

• receiving, from a network entity, a demodulation reference signal (DMRS) configuration for at least one of:
• a number of enhanced Type1 (eType1) or eType2 DMRS antenna ports, a minimal frequency-domain orthogonal cover code (FD-OCC) de-spreading length, or at least one orphan resource element (RE) handling scheme;
• receiving, from the network entity, downlink control information (DCI) that schedules a physical shared channel for at least one of:
• at least one indicated eType1/eType2 DMRS antenna port, an indicated minimal FD-OCC de-spreading length based on at least one indicated DMRS antenna port, or an indicated orphan RE handling scheme;
• and
• communicating with the network entity on the physical shared channel based on at least one of:
• the at least one indicated eType1/eType2 DMRS antenna port, the indicated minimal FD-OCC de-spreading length, or the indicated orphan RE handling scheme.

A method of wireless communication at a network entity, comprising:

• transmitting, to a user equipment (UE), a demodulation reference signal (DMRS) configuration for at least one of:
• a number of enhanced Type1 (eType1) or eType2 DMRS antenna ports, a minimal FD-OCC de-spreading length, or at least one orphan resource element (RE) handling scheme;
• transmitting, to the UE, downlink control information (DCI) that schedules a physical shared channel for at least one of:
• at least one indicated eType1/eType2 DMRS antenna port, an indicated minimal FD-OCC de-spreading length based on at least one indicated DMRS antenna port, or an indicated orphan RE handling scheme;
• and
• communicating with the UE on the physical shared channel based on at least one of:
• the at least one indicated eType1/eType2 DMRS antenna port, the indicated minimal FD-OCC de-spreading length, or the indicated orphan RE handling scheme.

An apparatus for wireless communication at a user equipment (UE), comprising:

• a transceiver;
• a memory;
• and
• a processor coupled to the memory and the transceiver, the processor configured to:
• receive, from a network entity, a demodulation reference signal (DMRS) configuration for at least one of:
• a number of enhanced Type1 (eType1) or eType2 DMRS antenna ports, a minimal frequency-domain orthogonal cover code (FD-OCC) de-spreading length, or at least one orphan resource element (RE) handling scheme;
• receive, from the network entity, downlink control information (DCI) that schedules a physical shared channel for at least one of:
• at least one indicated eType1/eType2 DMRS antenna port, an indicated minimal FD-OCC de-spreading length based on at least one indicated DMRS antenna port, or an indicated orphan RE handling scheme;
• and
• communicate with the network entity on the physical shared channel based on at least one of:
• the at least one indicated eType1/eType2 DMRS antenna port, the indicated minimal FD-OCC de-spreading length, or the indicated orphan RE handling scheme.