公开(公告)号：US10680684B1

公开(公告)日：2020-06-09

申请号：US16256328

申请日：2019-01-24

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hongbing Cheng ,  Hyukjoon Kwon ,  Qi Zhan ,  Kee-Bong Song

IPC: H04L23/02 ,  H04B7/0426 ,  H04B7/06 ,  H04B7/0456

Abstract: A method and system analog beamforming for a single-connected antenna array is herein disclosed. A method includes estimating analog channels on a per-antenna basis, calculating explicitly an analog beamforming matrix based on the estimated analog channels, and performing analog beamforming based on the calculated analog beamforming matrix.

公开(公告)号：US20200154382A1

公开(公告)日：2020-05-14

申请号：US16258069

申请日：2019-01-25

Applicant: Samsung Electronics Co., Ltd.

Inventor： Bemini Hennadige Janath PEIRIS ,  Hongbing Cheng ,  Kee-Bong Song

IPC: H04W56/00 ,  H04B1/709 ,  H04L5/00 ,  H04L27/26 ,  H04L1/18

Abstract: An apparatus is provided. The apparatus includes a processor configured to receive a synchronization signal (SS) and identify timing of the SS based on a primary spreading signal (PSS) in the SS, identify tentative secondary spreading signals (SSSs) based on the identified timing, and group the tentative SSSs; a register configured to receive the SS; and a memory configured to store the tentative SSSs for each group of the tentative SSSs; wherein the processor is further configured to cross correlate the tentative SSSs, combine cross correlated outputs with weights by group, determine an SSS as the tentative SSS with a maximum combined cross correlation outputs, and determine a cell identification based on the determined SSS.

公开(公告)号：US09960866B1

公开(公告)日：2018-05-01

申请号：US15421998

申请日：2017-02-01

Applicant: Samsung Electronics Co., Ltd.

Inventor： Binnan Zhuang ,  Hongbing Cheng ,  Jungwon Lee

IPC: H04B17/00 ,  H04B17/336 ,  H04B17/318

CPC classification number: H04B17/336 ,  H04B17/318

Abstract: A method and apparatus are provided. The method includes receiving a signal sequence and a noise sequence, determining a first absolute value sum approximation of a receive power of the signal sequence, determining a second absolute value sum approximation of a noise power of the noise sequence, and determining a signal-to-noise ratio (SNR) based on the first absolute value sum approximation and the second absolute value sum approximation.

公开(公告)号：US11652669B2

公开(公告)日：2023-05-16

申请号：US17489395

申请日：2021-09-29

Applicant: Samsung Electronics Co., Ltd.

Inventor： Bofeng Yuan ,  Hongbing Cheng ,  Kee-Bong Song

IPC: H04W4/00 ,  H04L25/02 ,  H04B17/336 ,  H04B1/7113

CPC classification number: H04L25/0216 ,  H04B1/7113 ,  H04B17/336 ,  H04L25/022 ,  H04L25/0256

Abstract: A method for minimizing a time domain mean square error (MSE) of channel estimation (CE) includes estimating, by a processor, a power delay profile (PDP) from a time domain observation of reference signal (RS) channels; estimating, by the processor, a noise variance of the RS channels; and determining, by the processor, a first arrival path (FAP) value and a delay spread estimation (DSE) value based on the estimated PDP and the estimated noise variance for minimizing the MSE of CE.

公开(公告)号：US11296428B2

公开(公告)日：2022-04-05

申请号：US16929035

申请日：2020-07-14

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jang Wook Moon ,  Hongbing Cheng ,  Kee-Bong Song

IPC: H01Q21/20 ,  H01Q9/04

Abstract: A first antenna array includes antenna panels including: first antenna panels arranged on a first circle having a first radius, each of the first antenna panels including antenna elements; and second antenna panels arranged on a second circle having a second radius, each of the second antenna panels including antenna elements, the second circle being concentric with the first circle at a center point, the second antenna panels being arranged at a first angle around the center point with respect to the first antenna panels, the first radius, the second radius, and the first angle being computed in accordance with wireless transmission conditions including: a line-of-sight distance to a second antenna array including third antenna panels arranged on two or more circles; and a carrier frequency of a line-of-sight wireless transmission between the first antenna array and the second antenna array.

公开(公告)号：US20220078049A1

公开(公告)日：2022-03-10

申请号：US17489395

申请日：2021-09-29

Applicant: Samsung Electronics Co., Ltd.

Inventor： Bofeng Yuan ,  Hongbing Cheng ,  Kee-Bong Song

IPC: H04L25/02 ,  H04B17/336 ,  H04B1/7113

Abstract: A method for minimizing a time domain mean square error (MSE) of channel estimation (CE) includes estimating, by a processor, a power delay profile (PDP) from a time domain observation of reference signal (RS) channels; estimating, by the processor, a noise variance of the RS channels; and determining, by the processor, a first arrival path (FAP) value and a delay spread estimation (DSE) value based on the estimated PDP and the estimated noise variance for minimizing the MSE of CE.

公开(公告)号：US11153123B2

公开(公告)日：2021-10-19

申请号：US16688866

申请日：2019-11-19

Applicant: Samsung Electronics Co., Ltd.

Inventor： Bofeng Yuan ,  Hongbing Cheng ,  Kee-Bong Song

IPC: H04W4/00 ,  H04L25/02 ,  H04B17/336 ,  H04B1/7113

Abstract: A method for minimizing a time domain mean square error (MSE) of channel estimation (CE) includes estimating, by a processor, a power delay profile (PDP) from a time domain observation of reference signal (RS) channels; estimating, by the processor, a noise variance of the RS channels; and determining, by the processor, a first arrival path (FAP) value and a delay spread estimation (DSE) value based on the estimated PDP and the estimated noise variance for minimizing the MSE of CE.

公开(公告)号：US11012225B1

公开(公告)日：2021-05-18

申请号：US17017500

申请日：2020-09-10

Applicant: Samsung Electronics Co., Ltd.

Inventor： Sili Lu ,  Hongbing Cheng

IPC: H04L7/00 ,  H04J3/06

Abstract: A synchronization detection method for new radio (NR) sidelink. In some embodiments, the method includes calculating a first delay compensated input signal, calculating a first correlation value, calculating a first correlation power, calculating a first weighted correlation power, and detecting a synchronization signal. The first delay compensated input signal may be based on an input signal, and an index of a first tap value. The first correlation value may be based on a first candidate sequence and the first delay compensated input signal. The first correlation power may be based on the first correlation value. The first weighted correlation power may be based on a first weighting factor, and the first correlation power. The detecting of the synchronization signal may include using the first weighted correlation power.

公开(公告)号：US10892810B2

公开(公告)日：2021-01-12

申请号：US16735042

申请日：2020-01-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Qi Zhan ,  Hongbing Cheng ,  Kee-Bong Song

IPC: H04B7/06 ,  H04B7/0456

Abstract: An apparatus and method for dynamically selecting a beamforming codebook and hierarchically generating beamforming codebooks is provided. According to one embodiment, an apparatus includes a channel estimation processor configured to receive a signal using a current beamforming codebook in a current beam sweeping period; a look-up table configured to store a plurality of beamforming codebooks; a state abstraction processor connected between the channel estimation processor and the look-up table, and configured to determine a codebook index based on a current channel condition as a function of the received signal and the current beamforming codebook, and select one of the plurality of beam sweeping codebooks in the look-up table as the beamforming codebook for the next beam sweeping period based on the codebook index.

公开(公告)号：US20200287757A1

公开(公告)日：2020-09-10

申请号：US16884918

申请日：2020-05-27

Applicant: Samsung Electronics Co., Ltd.

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

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

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.