METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN MULTI-ANTENNA SYSTEM

摘要

Provided are a method and apparatus for transmitting a reference signal in a multi-antenna system. A terminal generates a plurality of reference signal sequences to which cyclic shift values different from each other are allocated, generates an orthogonal frequency division multiplexing (OFDM) symbol to which the plurality of reference signal sequences are mapped, and transmits the OFDM symbol to a base station through a plurality of antennas. The respective cyclic shift values allocated to the respective reference signal sequences are determined on the basis of a parameter n indicated by a cyclic shift field transmitted from a physical downlink control channel (PDCCH).

主权项

1. A method for receiving, by a base station (BS), demodulation reference signals (DMRSs) for a physical uplink shared channel (PUSCH) in a wireless communication system, the method comprising:
receiving first, second, third and fourth DMRS sequences, which are respectively associated with first, second, third, and fourth layers, from a user equipment (UE), wherein the first, second, third and fourth DMRS sequences are generated, by the UE, by using first, second, third, and fourth values assigned for the first, second, third and fourth DMRS layers respectively,
wherein the first and second values are separated by a maximum value corresponding to a total number of possible cyclic shifts, andwherein the third and fourth values are separated by the maximum value corresponding to a total number of possible cyclic shifts, and wherein the first, second, third and fourth DMRS sequences are mapped, by the UE, to resource elements (REs) in two slots,
wherein the first and second DMRS sequences mapped in a second slot among the two slots are multiplied by 1, andwherein the third and fourth DMRS sequences mapped in the second slot among the two slots are multiplied by −1.