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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.
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12.
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.
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