公开(公告)号：US10044423B2

公开(公告)日：2018-08-07

申请号：US15453553

申请日：2017-03-08

Applicant: Samsung Electronics Co., Ltd.

Inventor： Federico Penna ,  Hongbing Cheng ,  Jungwon Lee

IPC: H04B7/02 ,  H04B7/0456 ,  H04L25/03

Abstract: An apparatus and a method. The apparatus includes a singular value decomposition (SVD) processor configured to receive a channel matrix H and output samples y of an optimal precoding matrix for H; a linear phase estimation (LPE) processor connected to the SVD processor and configured to determine a phase estimate {circumflex over (θ)}l of an angle θl of a horizontal discrete Fourier transform (DFT) index l, where l is an integer; and a decision processor connected to the LPE processor and configured to determine a hard estimate of l.

公开(公告)号：US09755717B1

公开(公告)日：2017-09-05

申请号：US15205329

申请日：2016-07-08

Applicant: Samsung Electronics Co., Ltd.

Inventor： Federico Penna ,  Hongbing Cheng ,  Jungwon Lee

IPC: H04B7/04 ,  H04B7/06 ,  H04B7/0413 ,  H04B7/0456

CPC classification number: H04B7/0473 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0639

Abstract: A method for selecting a precoder from a codebook for a channel matrix H and an apparatus. The method includes determining, by a processor, a reference precoder V for the channel H and a phase rotation for V; for all codewords W from a codebook, determining, by the processor, phase rotations for W and phase distances based on differences between phases of elements of V and W; and selecting, by the processor, the codeword W with a minimum phase distance, wherein H has a size of NR×NT, NR is a number of receive antennas, NT is a number of transmit antennas, V has a size of NT×L, and L is a number of data layers transmitted simultaneously.