公开(公告)号：US20200153664A1

公开(公告)日：2020-05-14

申请号：US16239441

申请日：2019-01-03

Applicant: Samsung Electronics Co., Ltd.

Inventor： Federico Penna ,  Hongbing Cheng ,  Kee-Bong Song

IPC: H04L25/03 ,  H04L27/26 ,  H04L5/00 ,  H04J13/00 ,  H04J13/18 ,  H04J11/00

Abstract: A receiver circuit for separating a plurality of layers multiplexed in an orthogonal frequency domain multiplexed (OFDM) signal includes: a descrambling sub-circuit configured to descramble a plurality of signals received on non-adjacent subcarriers of the OFDM signal to generate a plurality of descrambled signals; an inverse fast Fourier transform sub-circuit configured to transform the descrambled signals from a frequency domain to a received signal including a plurality of samples in a time domain; and a layer separation sub-circuit configured to separate the layers multiplexed in the received signal by: defining a first time domain sampling window and a second time domain sampling window in accordance with a size of the inverse fast Fourier transform; extracting one or more first layers from the samples in the first time domain sampling window; and extracting one or more second layers from the samples in the second time domain sampling window.

公开(公告)号：US20190173718A1

公开(公告)日：2019-06-06

申请号：US16269223

申请日：2019-02-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Xiaoqiang MA ,  Hongbing Cheng ,  Linbo Li ,  Jungwon Lee

IPC: H04L27/26

Abstract: An apparatus including a plurality of multipliers each configured to multiply correlations by a weight, wherein the correlations include a plurality of subsets of correlations, wherein the weight of each of the plurality of multipliers is uniquely different from the weights of at least two of the plurality of multipliers and the correlations; a summation processor configured to sum the weight multiplied correlations of the plurality of multipliers for time n, where n is an integer; and a coarse timing and coarse frequency processor configured to generate a coarse timing and a coarse frequency based on the sum.

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：US20180167254A1

公开(公告)日：2018-06-14

申请号：US15446673

申请日：2017-03-01

Applicant: Samsung Electronics Co., Ltd.

Inventor： Xiaoqiang MA ,  Hongbing Cheng ,  Linbo Li ,  Jungwon Lee

IPC: H04L27/26 ,  H04L7/06

CPC classification number: H04L27/2663 ,  H04L27/2601 ,  H04L27/2671 ,  H04L27/2675

Abstract: An apparatus and a method. The apparatus includes a plurality of correlation processors configured to each receive a group of samples and generate correlations of each group of samples; a plurality of multipliers each configured to multiply the correlations of one of the plurality of correlation processors by a weight, wherein the weight of at least one of the plurality of multipliers is different from the weight of at least another one of the plurality of multipliers; a summation processor configured to sum the weight multiplied correlations of the plurality of multipliers for time n, where n is an integer; and a coarse timing and coarse frequency processor configured to generate a coarse timing and a coarse frequency based on the sum.

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.