US 12,407,392 B2
Precoding and feedback channel information in wireless communication system
Jianjun Li, Seoul (KR); and Kyoungmin Park, Seoul (KR)
Assigned to PANTECH CORPORATION, Seoul (KR)
Filed by PANTECH CORPORATION, Seoul (KR)
Filed on Apr. 15, 2024, as Appl. No. 18/635,702.
Application 18/635,702 is a continuation of application No. 17/862,347, filed on Jul. 11, 2022, granted, now 11,962,383.
Application 17/862,347 is a continuation of application No. 17/170,808, filed on Feb. 8, 2021, granted, now 11,387,888, issued on Jul. 12, 2022.
Application 17/170,808 is a continuation of application No. 16/819,625, filed on Mar. 16, 2020, granted, now 10,917,157, issued on Jul. 9, 2020.
Application 16/819,625 is a continuation of application No. 16/203,319, filed on Nov. 28, 2018, abandoned.
Application 16/203,319 is a continuation of application No. 15/814,605, filed on Nov. 16, 2017, granted, now 10,153,821, issued on Dec. 11, 2018.
Application 15/814,605 is a continuation of application No. 15/131,725, filed on Apr. 18, 2016, granted, now 9,825,686, issued on Nov. 21, 2017.
Application 15/131,725 is a continuation of application No. 13/500,288, granted, now 9,319,252, issued on Apr. 19, 2016, previously published as PCT/KR2009/005705, filed on Oct. 6, 2009.
Prior Publication US 2024/0291544 A1, Aug. 29, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 1/38 (2015.01); H04B 7/0417 (2017.01); H04B 7/0426 (2017.01); H04B 7/06 (2006.01); H04L 25/03 (2006.01); H04W 48/12 (2009.01); H04W 48/08 (2009.01)
CPC H04B 7/065 (2013.01) [H04B 7/0417 (2013.01); H04B 7/0426 (2013.01); H04B 7/0639 (2013.01); H04L 25/03343 (2013.01); H04W 48/12 (2013.01); H04L 2025/03808 (2013.01); H04W 48/08 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A communication method comprising:
estimating a downlink channel based on a signal received from a base station;
transmitting a first-precoding matrix index (PMI) to the base station periodically based on a first period;
transmitting a second-PMI to the base station periodically based on a second period;
receiving, from the base station, a downlink signal which includes precoded data symbols;
determining a precoding matrix to decode the received downlink signal; and
decoding the received downlink signal using the determined precoding matrix, wherein the first period and the second period are different from each other.