Hybrid dedicated reference signal method and system

摘要

The transmission and decoding of resource blocks (RBs) transmitted via a multiple-input multiple-output (MIMO) antenna having a plurality of transmit antennas is disclosed. Each RB includes a plurality of resource elements (REs). Each RE is reserved for one of a common reference signal (CRS) associated with one of the transmit antennas, a dedicated reference signal (DRS) including a single beamformed or precoded pilot, a DRS including a composite beamformed or precoded pilot, and a data symbol. Each RB may include a “control type” data symbol that indicates a DRS mode associated with the RB. In one DRS mode, each DRS includes a single beamformed or precoded pilot. In another DRS mode, each DRS includes a composite beamformed or precoded pilot. In yet another DRS mode, single beamformed or precoded pilots, and composite beamformed or precoded pilots, may coexist and be transmitted simultaneously within the same RBs or in different RBs.

主权项

1. A method implemented in a wireless transmit/receive unit (WTRU), the method comprising:
receiving multiple resource blocks (RBs), wherein:
each resource block (RB) of the multiple RBs comprises multiple resource elements (REs);the REs comprise one or more data symbols, one or more control-type data symbols, and one or more dedicated reference signals (DRSs) specific to a single WTRU;the control-type data symbols comprise a DRS mode indicator signaling any of multiple DRS modes;in a first DRS mode of the multiple DRS modes, a first configuration of the REs is used for the DRSs and the DRSs comprise single beamformed or precoded pilots; andin a second DRS mode of the multiple DRS modes, a second configuration of the REs is used for the DRSs and the DRSs comprises composite beamformed or precoded pilots; determining, based on the signaled DRS mode, which of the REs include the DRSs; estimating a channel response based on the DRSs; and decoding data in the data symbols based on the estimated channel response.