US 12,267,137 B2
Reporting channel state information (CSI) precoding matrix indicator (PMI)
Filippo Tosato, Bures sur Yvette (FR); and Rana Ahmed Salem, Munich (DE)
Assigned to NOKIA TECHNOLOGIES OY, Espoo (FI)
Filed by Nokia Technologies Oy, Espoo (FI)
Filed on Apr. 27, 2022, as Appl. No. 17/730,676.
Claims priority of provisional application 63/230,349, filed on Aug. 6, 2021.
Claims priority of provisional application 63/187,347, filed on May 11, 2021.
Prior Publication US 2022/0393743 A1, Dec. 8, 2022
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01)
CPC H04B 7/0639 (2013.01) [H04B 7/0456 (2013.01); H04B 7/0634 (2013.01); H04B 7/0663 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An apparatus comprising:
at least one processor; and
at least one memory storing instructions thereon that, when executed by the at least one processor, cause the apparatus to perform at least:
receiving configuration information for configuring a measurement window of a compression matrix of a port selection codebook, wherein the configuration information defines a size of the measurement window;
selecting a number of codebook indices of the measurement window based on the configuration information for forming the compression matrix, wherein the codebook indices are associated with vector components of the compression matrix;
mapping the selected codebook indices with respect to a reference vector component having a lowest index of the selected codebook indices in the measurement window, such that a codebook index of the reference vector component is zero after the mapping; and
reporting channel state information including a precoding matrix indicator to a network, wherein the precoding matrix indicator comprises information associated with the compression matrix after the mapping.