QUALCOMM Incorporated
Channel state information reference signal transmission

Abstract:

Methods, systems, and devices for wireless communication are described. A base station may determine a mapping configuration for antenna ports that includes mapping antenna ports with high spatial correlation to frequency resource and mapping antenna ports with low spatial correlation to time resources. The base station may apply a common coding mechanism to channel state information reference signals (CSI-RSs) having a timing domain and transmit the CSI-RSs using antenna ports with high frequency separation. A user equipment (UE) may receive the CSI-RS on the channel and identify a joint correlation metric based on a frequency correlation and a spatial correlation between CSI-RS and the channel. The UE may determine a channel estimate for the channel based on the joint correlation metric.