Aspects are described for a user equipment (UE) comprising a transceiver configured to enable wireless communication with a base station, and a processor communicatively coupled to the transceiver. The processor is configured to receive a configuration message from the base station and determine a first set of antenna ports based on the configuration message. The processor is further configured to perform channel estimation on the first set of antenna port and perform or refrain from performing channel estimation on a second set of antenna ports based on the configuration message. The first set of antenna ports and the second set of antenna ports are in a code division multiplexing (CDM) group.