US 11,855,730 B2
Apparatus and method for reconstructing downlink channel in wireless communication system
Yongyun Choi, Suwon-si (KR); Chulhee Jang, Suwon-si (KR); Hyeongtaek Lee, Daejeon (KR); Junil Choi, Daejeon (KR); and Hwanjin Kim, Daejeon (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR); and KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR); and KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Filed on Mar. 24, 2022, as Appl. No. 17/703,379.
Application 17/703,379 is a continuation of application No. PCT/KR2020/013021, filed on Sep. 25, 2020.
Claims priority of application No. 10-2019-0119613 (KR), filed on Sep. 27, 2019.
Prior Publication US 2022/0224388 A1, Jul. 14, 2022
Int. Cl. H04B 7/06 (2006.01); H04B 7/08 (2006.01); H04L 5/00 (2006.01); H04W 72/23 (2023.01); H04W 72/54 (2023.01)
CPC H04B 7/0634 (2013.01) [H04B 7/086 (2013.01); H04L 5/0048 (2013.01); H04W 72/23 (2023.01); H04W 72/54 (2023.01)] 18 Claims
OG exemplary drawing
 
1. A method performed by a base station in a wireless communication system, the method comprising:
transmitting downlink reference signals (RSs) to a terminal;
receiving an indication for a first channel matrix inferred by the terminal and at least one uplink RS from the terminal;
inferring a second channel matrix based on the at least one uplink RS; and
reconstructing channel information to be used for data transmission based on the first channel matrix and the second channel matrix,
wherein the indication indicates quantized channel information between antenna ports of the base station and antennas of the terminal, and
wherein the second channel matrix indicates channel information between one antenna used for transmitting the at least one uplink RS and antenna ports of the base station.