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

摘要

A method and apparatus are described 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 transmitting, by a user equipment (UE), a demodulation reference signal (DMRS) for a physical uplink shared channel (PUSCH) in a wireless communication system, the method comprising:
receiving a cyclic shift field through a physical downlink control channel (PDCCH) from a base station, wherein the cyclic shift field indicates first, second, third and fourth cyclic shifts; generating a first DMRS sequence, which is associated with a first layer, by using the first cyclic shift; generating a second DMRS sequence, which is associated with a second layer, by using the second cyclic shift; generating a third DMRS sequence, which is associated with a third layer, by using the third cyclic shift, wherein the third DMRS sequenced mapped in a second slot among two slots is multiplied with −1; generating a fourth DMRS sequence, which is associated with a fourth layer, by using the fourth cyclic shift, wherein the fourth DMRS sequenced mapped in the second slot among the two slots is multiplied with −1; and transmitting the first, second, third and fourth DMRS sequences to the base station, wherein the first and second cyclic shifts are separated by a maximum value corresponding to a total number of possible cyclic shifts, and wherein the third and fourth cyclic shifts are separated by the maximum value corresponding to the total number of possible cyclic shifts.