Patent ID: 9559799
Date: 2017-01-31
CPC Classifications: H04J,H04L,H04W

Claim:
1. A method for transmitting, by a base station (BS), a plurality of user equipment specific reference signals (UE-RSs) to a user equipment (UE) in a wireless communication system, the method comprising: applying, by the BS, a set of Walsh codes to the plurality of UE-RSs; and transmitting, by the BS, the plurality of UE-RSs on resource blocks allocated to the UE, wherein the set of Walsh codes are defined as wherein each of the resource blocks includes 12 subcarriers in a frequency domain and 14 orthogonal frequency division multiplexing (OFDM) symbols in a time domain and 12 subcarriers in a subframe, wherein a first set of 4 UE-RSs among the plurality of UE-RSs and a second set of 4 UE-RSs not belonging to the first set among the plurality of UE-RSs are transmitted on two consecutive subcarriers of the resource blocks, respectively, in the subframe according to a first Walsh pattern defined as the following Table 1 or a second Walsh code pattern defined as the following Table 2: and and wherein the first Walsh code pattern and the second Walsh code pattern alternate with each other along the frequency domain on the resource blocks.