US 12,231,193 B2
Method and apparatus for processing signal in multi-antenna multicarrier system
Nagwon Kwon, Yongin-si (KR); Hyunchae Kim, Seoul (KR); and Jihoon Choi, Seoul (KR)
Assigned to SOLID, INC., Seongnam-si (KR); and INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITY, Goyang-si (KR)
Filed by SOLiD, INC., Seongnam-si (KR); and INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITY, Goyang-si (KR)
Filed on Oct. 24, 2022, as Appl. No. 18/049,021.
Claims priority of application No. 10-2021-0141545 (KR), filed on Oct. 22, 2021; and application No. 10-2022-0135812 (KR), filed on Oct. 20, 2022.
Prior Publication US 2023/0179272 A1, Jun. 8, 2023
Int. Cl. H04B 7/0456 (2017.01); H04L 5/00 (2006.01)
CPC H04B 7/0456 (2013.01) [H04L 5/0098 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A communication node of a multi-antenna multi-carrier system, the communication node comprising a precoder configured to perform precoding on a signal to be transmitted to another communication node connected to the communication node,
wherein the precoder comprises:
a serial-to-parallel (S/P) converter configured to generate a plurality of vector signals allocated to respective subcarriers allocated to the another communication node by performing S/P conversion on a signal including a plurality of modulated symbols;
at least one spherical interpolator, when precoding matrices corresponding to some subcarriers from among the subcarriers allocated to the another communication node are input, configured to obtain the precoding matrices for at least some subcarriers from among the allocated subcarriers by performing spherical interpolation on input precoding matrices;
a precoding matrix-subcarrier mapping block configured to map the obtained precoding matrices for the at least some subcarriers to the subcarriers allocated to the another communication node; and
at least one precoding block configured to perform precoding on the plurality of vector signals using the mapped precoding matrices,
wherein the at least one spherical interpolator is configured to:
perform logarithmic mapping on two adjacent precoding matrices,
perform singular value decomposition on log-mapped matrices, and
obtain the precoding matrices for at least some subcarriers through generalized exponential mapping using the results of singular value decomposition.