US 9,813,123 B2
Multi-input and multi-output communication method in large-scale antenna system
Jun Young Nam, Daejeon (KR); and Jae Young Ahn, Daejeon (KR)
Assigned to Electronics and Telecommunications Research Institute, Daejeon (KR)
Appl. No. 14/379,371
Filed by Electronics and Telecommunications Research Institute, Daejeon (KR)
PCT Filed Feb. 25, 2013, PCT No. PCT/KR2013/001475
§ 371(c)(1), (2) Date Aug. 18, 2014,
PCT Pub. No. WO2013/125917, PCT Pub. Date Aug. 29, 2013.
Claims priority of application No. 10-2012-0018420 (KR), filed on Feb. 23, 2012; application No. 10-2012-0063168 (KR), filed on Jun. 13, 2012; application No. 10-2012-0128338 (KR), filed on Nov. 13, 2012; application No. 10-2013-0001097 (KR), filed on Jan. 4, 2013; and application No. 10-2013-0019075 (KR), filed on Feb. 22, 2013.
Prior Publication US 2015/0016379 A1, Jan. 15, 2015
Int. Cl. H04B 7/04 (2006.01); H04B 7/0452 (2017.01); H04W 72/12 (2009.01); H04B 7/06 (2006.01); H04B 7/0456 (2017.01)
CPC H04B 7/0452 (2013.01) [H04B 7/0456 (2013.01); H04B 7/0482 (2013.01); H04B 7/0617 (2013.01); H04B 7/0619 (2013.01); H04B 7/0634 (2013.01); H04B 7/0639 (2013.01); H04W 72/1226 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An operation method of a user equipment (UE) in a wireless communication system, the operation method comprising:
receiving, from a base station, information on the number of antennas and a subset of beams which is selected among all possible beams of the base station;
generating a codebook based on the information;
receiving a reference signal (RS) from the base station;
calculating channel state information (CSI) based on the RS by using the codebook; and
reporting the CSI to the base station,
wherein the codebook is generated by using Kronecker product of a horizontal beamforming vector and a vertical beamforming vector.