Patent ID: 8913675

Claim:
A wireless communication method of transmitting resource blocks (RBs), the method comprising: generating multiple RBs, wherein: each RB of the multiple RBs comprises multiple resource elements (REs); the REs comprise at least one dedicated reference signal (DRS) specific to a single wireless transmit/receive unit (WTRU) and at least one control-type data symbol; the at least one control-type data symbol comprises 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 at least one DRS and the at least one DRS comprises a respective at least one single beamformed or precoded pilot; and in a second DRS mode of the multiple DRS modes, a second configuration of the REs is used for the at least one DRS and the at least one DRS comprises a respective at least one composite beamformed or precoded pilot; and transmitting the RBs via a multiple-input multiple-output (MIMO) antenna.