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公开(公告)号：US10382244B2
公开(公告)日：2019-08-13
申请号：US15586792
申请日：2017-05-04
Applicant: Samsung Electronics Co., Ltd.
Inventor： Amir Dezfooliyan , Vignesh Sethuraman , Hamed Maleki , Linbo Li , Kee-Bong Song
IPC: H04L27/26
Abstract: A method and apparatus are provided. The method includes receiving a reference signal from a transceiver, estimating a time offset (TO) of the reference signal in the frequency domain based on an accumulation of subcarriers before cross-correlation, providing a TO compensated signal of the reference signal based on the estimated TO in the frequency domain, transforming the TO compensated signal into the time domain, and estimating a frequency offset (FO) based on the time domain TO compensated signal.
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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.
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3.发明授权公开(公告)号：US10079660B2
公开(公告)日：2018-09-18
申请号：US15433859
申请日：2017-02-15
Applicant: Samsung Electronics Co., Ltd.
Inventor： Chun Kin Au Yeung , Farrokh Etezadi , Xiaoqiang Ma , Linbo Li , Kee-Bong Song
IPC: H04L1/24 , H04L27/156 , H04L27/233 , H04L12/26 , H04L29/12
CPC classification number: H04L1/242 , H04L27/156 , H04L27/2337 , H04L61/6081
Abstract: According to an embodiment of the present disclosure, a receiver of modulated signals comprises a signal sampling unit configured to sample a signal, a zero-crossing demodulator, and a timing offset tracking unit. The zero-crossing demodulator includes: a zero-crossing counter configured to determine a number of zero crossings for each pulse of the signal, and a symbol selector configured to decode a sequence of pulses as a symbol based on the number of zero crossings in the sequence of pulses. The timing offset tracking unit is configured to: calculate a metric based on an accumulation of the number of zero crossings and corresponding pulse values of the decoded symbol, compare the metric to a predetermined threshold value, and compensate a timing offset of the signal by causing the signal sampling unit to sample the signal at an earlier interval or a later interval in response to the comparison.
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4.发明申请公开(公告)号：US20180212724A1
公开(公告)日：2018-07-26
申请号：US15433859
申请日：2017-02-15
Applicant: Samsung Electronics Co., Ltd.
Inventor： Chun Kin Au Yeung , Farrokh Etezadi , Xiaoqiang Ma , Linbo Li , Kee-Bong Song
IPC: H04L1/24 , H04L27/156 , H04L27/233 , H04L12/26
CPC classification number: H04L1/242 , H04L27/156 , H04L27/2337 , H04L43/16
Abstract: According to an embodiment of the present disclosure, a receiver of modulated signals comprises a signal sampling unit configured to sample a signal, a zero-crossing demodulator, and a timing offset tracking unit. The zero-crossing demodulator includes: a zero-crossing counter configured to determine a number of zero crossings for each pulse of the signal, and a symbol selector configured to decode a sequence of pulses as a symbol based on the number of zero crossings in the sequence of pulses. The timing offset tracking unit is configured to: calculate a metric based on an accumulation of the number of zero crossings and corresponding pulse values of the decoded symbol, compare the metric to a predetermined threshold value, and compensate a timing offset of the signal by causing the signal sampling unit to sample the signal at an earlier interval or a later interval in response to the comparison.
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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
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.
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Patent Agency Ranking
公开(公告)号：US09578600B2
公开(公告)日：2017-02-21
申请号：US14564733
申请日：2014-12-09
Applicant: Samsung Electronics Co., Ltd.
Inventor： Linbo Li , Jaber Borran , Yingqun Yu , Inyup Kang
CPC classification number: H04W52/0212 , H04W52/0229 , H04W72/042 , Y02D70/1262 , Y02D70/168
Abstract: A method and an apparatus are provided for determining whether an enhanced physical downlink control channel (ePDCCH) transmission exists for a user equipment (UE) in a subframe. The UE receives a transmission on physical downlink control channel (PDCCH) resources of the subframe. Downlink control information (DCI) is extracted from the PDCCH resources. The DCI includes at least one bit indicating whether the ePDCCH transmission exists for the UE in the subframe. The UE determines whether the ePDCCH transmission exists using the at least one bit. Additional symbols of the subframe are buffered and decoded when the ePDCCH transmission exists.
Abstract translation: 提供了一种用于确定在子帧中是否存在针对用户设备（UE）的增强物理下行链路控制信道（ePDCCH）传输的方法和装置。 UE在子帧的物理下行链路控制信道（PDCCH）资源上接收传输。 从PDCCH资源提取下行链路控制信息（DCI）。 DCI包括至少一个位，指示在子帧中UE是否存在ePDCCH传输。 UE确定使用至少一个比特是否存在ePDCCH传输。 当存在ePDCCH传输时，子帧的附加符号被缓冲和解码。
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公开(公告)号：US10749725B2
公开(公告)日：2020-08-18
申请号：US16270159
申请日：2019-02-07
Applicant: Samsung Electronics Co., Ltd.
Inventor： Hyukjoon Kwon , Linbo Li , Jungwon Lee , Sandeep Krishnamurthy
Abstract: Apparatuses, systems, and methods are described concerning a new type of superposition multiplexing transmission constellation (super-constellation): the Gray-mapped Non-uniform-capable Constellation (GNC). Apparatuses, systems, and methods for generating GNC super-constellations are described, as well as apparatuses, systems, and methods for receiving, demapping, and decoding transmissions using GNC super-constellations. Apparatuses, systems, and methods for selecting a type of superposition multiplexing transmission constellation based on various conditions are also described.
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8.发明授权公开(公告)号：US10575267B2
公开(公告)日：2020-02-25
申请号：US15452132
申请日：2017-03-07
Applicant: Samsung Electronics Co., Ltd.
Inventor： Hyukjoon Kwon , Linbo Li
Abstract: A method and apparatus are provided. The method includes receiving a signal from a transceiver, demapping a bit pattern encoded within the signal, detecting a preamble based on the demapped bit pattern, and synchronizing the transceiver to a receiver using the preamble, wherein demapping the bit pattern is based on weighting coefficients.
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公开(公告)号：US10432391B2
公开(公告)日：2019-10-01
申请号：US16031944
申请日：2018-07-10
Applicant: Samsung Electronics Co., Ltd.
Inventor： Farrokh Etezadi , Linbo Li , Chun Kin Au Yeung , Xiaoqiang Ma
Abstract: A receiver of a modulated signal is presented. The receiver includes a synchronization detector configured to receive a signal indicative of the modulated signal that includes a synchronization header and a data payload, and to detect an end of the synchronization header. The synchronization detector is configured to generate a differential signal based on the signal, perform cross-correlation of the differential signal with a reference differential signal to generate a cross-correlation output, compare a first sample of the cross-correlation output at a sample index associated with a hypothesized start frame delimiter (SFD) peak index with a second sample of the cross-correlation output at a sample index associated with a hypothesized preamble peak index, and detect an end of the synchronization header in response to a comparison result in which a magnitude of the first sample is greater than a magnitude of the second sample of the cross-correlation output.
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公开(公告)号：US10355792B2
公开(公告)日：2019-07-16
申请号：US15462639
申请日：2017-03-17
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yoo Jin Choi , Dongwoon Bai , Linbo Li , Farrokh Etezadi , Jungwon Lee
IPC: H04B1/10 , H04B17/336 , H04L27/148 , H04L27/10 , H04B17/21
Abstract: A system and method for removing bias from a frequency estimate. A simulation is used to predict, for various values of the signal to noise ratio, a bias in a raw frequency estimate produced by a frequency estimation algorithm. A straight line is fit to simulated frequency offset estimates as a function of true frequency offset, and the reciprocal of the slope of the line is stored, as a multiplicative bias removal term, in a lookup table, for the simulated signal to noise ratio. In operation, the raw frequency estimate is multiplied by a multiplicative bias removal term, obtained from the lookup table, to form a corrected frequency offset estimate.
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