Patent ID: 8654734

Claim:
A method of wireless communication of channel state information-reference symbols (CSI-RS) between a base station having multiple antenna and at least one user equipment in code division multiplexing-time (CDM-T) multiplexing comprising the steps of: each user equipment determining a cell group CSI-RS pattern (10, 11) in physical resource blocks (PRBs) having an X-axis of time in Orthogonal Frequency Division Multiplexing (OFDM) symbols and a Y-axis of frequency in Resource Elements (RE) from Cell-ID modulo 3: each user equipment mapping their Cell-ID to an element in a set of candidate OFDM pairs to choose a corresponding OFDM symbol pair on which to transmit CDM-T multiplexed CSI-RS pilots, thereby determining OFDM symbol locations for Antenna Port (AP) 0; each user equipment determining a RE offset for Antenna Port (AP) 0 from the value of Cell-ID modulo 3; and each user equipment transmitting extended cyclic prefix (CP) CSI-RS signals on the determined portions of the PRB.