Patent ID: 8982834
Filing Date: 2015-03-17
Classification: H04B,H04L,H04W

Abstract:
1. A method for transmitting a demodulation reference signal (DMRS) for a physical uplink shared channel (PUSCH) in a wireless communication system, the method comprising: generating a plurality of DMRS sequences associated with a plurality of layers respectively, wherein the plurality of DMRS sequences are generated based on different cyclic shifts allocated to the plurality of DMRS sequences respectively, and an orthogonal covering code (OCC) applied to the plurality of DMRS sequences respectively; mapping the plurality of DMRS sequences to resource elements (REs); and transmitting the plurality of DMRS sequences to a base station, wherein the different cyclic shifts and the OCC are indicated by a cyclic shift field in a downlink control information (DCI) format received through a physical downlink control channel (PDCCH), wherein a first OCC is applied to a first DMRS sequence, among the plurality of DMRS sequences, and a second DMRS sequence, among the plurality of DMRS sequences, and wherein a second OCC is applied to a third DMRS sequence, among the plurality of DMRS sequences, and a fourth DMRS sequence, among the plurality of DMRS sequences.