Glue reference signal for multiple coherent dmrs ports

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

• obtaining, in a first time span, a first reference signal associated with multiple coherent ports in a code division multiplexing (CDM) group;
• obtaining, in a second time span prior to the first time span, a second reference signal associated with at least one tone and code division multiplexed based on the multiple coherent ports for the first reference signal, the second reference signal being configured for compensation of a phase change across a gap between the second time span and the first time span, the first time span and the second time span respectively corresponding to different start and length indicator values (SLIVs) or different slots of a same SLIV;
• obtaining, in the second time span, a third reference signal associated with the multiple coherent ports in the CDM group;
• and
• obtaining a physical downlink shared channel (PDSCH), or sending a physical uplink shared channel (PUSCH), in the second time span or the first time span based at least in part on the second reference signal and a combination of the first reference signal and the third reference signal.

An apparatus for wireless communication, comprising:

• one or more memories;
• and
• one or more processors each communicatively coupled with at least one of the one or more memories, the one or more processors, individually or in any combination, operable to cause the apparatus to:
• send, in a first time span, a first reference signal associated with multiple coherent ports in a code division multiplexing (CDM) group;
• send, in a second time span prior to the first time span, a second reference signal associated with at least one tone and code division multiplexed based on the multiple coherent ports for the first reference signal, the second reference signal being configured for compensation of a phase change across a gap between the second time span and the first time span, the first time span and the second time span respectively corresponding to different start and length indicator values (SLIVs) or different slots of a same SLIV;
• send, in the second time span, a third reference signal associated with the multiple coherent ports in the CDM group;
• and
• send a physical downlink shared channel (PDSCH), or obtain a physical uplink shared channel (PUSCH), in the second time span or the first time span based at least in part on the second reference signal and a combination of the first reference signal and the third reference signal.

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

• sending, in a first time span, a first reference signal associated with multiple coherent ports in a code division multiplexing (CDM) group;
• sending, in a second time span prior to the first time span, a second reference signal associated with at least one tone and code division multiplexed based on the multiple coherent ports for the first reference signal, the second reference signal being configured for compensation of a phase change across a gap between the second time span and the first time span, the first time span and the second time span respectively corresponding to different start and length indicator values (SLIVs) or different slots of a same SLIV;
• sending, in the second time span, a third reference signal associated with the multiple coherent ports in the CDM group;
• and
• sending a physical downlink shared channel (PDSCH), or obtaining a physical uplink shared channel (PUSCH), in the second time span or the first time span based at least in part on the second reference signal and a combination of the first reference signal and the third reference signal.