Patent ID: 9294243
Filing Date: 2016-03-22
CPC Classification: H04J,H04L

Claim Text:
1. A method for an eNode B transmitting user equipment (UE)-specific reference signals to a UE in a wireless communication system, the method comprising: generating, by the eNodeB, the UE-specific reference signal sequences by applying a set of Walsh codes to reference signal sequences for resource elements (REs) that are allocated to each of a plurality of layers used for transmitting the UE-specific reference signals; and transmitting, by the eNodeB to the UE via each layer of the plurality of layers, the UE-specific reference signals to which the generated UE-specific reference signal sequences are applied, wherein the set of Walsh codes is repeatedly applied to the reference signal sequences in a frequency domain direction by units of two resource block (RB) pairs, wherein a mapping pattern of the set of Walsh codes mapped to a first resource block (RB) pair is different from a mapping pattern of the set of Walsh codes mapped to a second RB pair, and wherein the second RB pair is contiguous to the first RB pair in a frequency domain.