Patent ID: 8958488
Filing Date: 2015-02-17
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A method of transmitting a demodulation reference signal (DMRS) for a physical uplink shared channel (PUSCH) in a wireless communication system, the method comprising: generating first and second DMRS sequences respectively associated with a first and second layer of a plurality of layers consisting of two layers, wherein first and second cyclic shifts are allocated to the first and second DMRS sequences, respectively; mapping the first and second DMRS sequences to resource elements (REs); and transmitting the first and second DMRS sequences to a base station, wherein the first and second cyclic shifts allocated to the first and second DMRS sequences are determined respectively based on a first value and a second value, the first and second values indicated by a common cyclic shift field received through a physical downlink control channel (PDCCH), and wherein the first and second values are separated by a maximum value corresponding to a total number of possible cyclic shifts.