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公开(公告)号：US11012262B2
公开(公告)日：2021-05-18
申请号：US16899181
申请日：2020-06-11
Applicant: Apple Inc.
Inventor： Yuval Avner , Michael Kerner , Ran Forte
IPC: H04L25/02
Abstract: Embodiments are presented herein of apparatuses, systems, and methods for a wireless device to perform improved channel estimates for sensing applications such as ranging. The wireless device may determine noise characteristics, e.g., a spectrum of the variance of noise on a channel and may use the noise characteristics to estimate a response of an analog front end of the wireless device. The wireless device may correct a channel estimate based on the estimated response of the analog front end.
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公开(公告)号：US20180006857A1
公开(公告)日：2018-01-04
申请号：US15454172
申请日：2017-03-09
Applicant: Apple Inc.
Inventor： Yuval Avner
Abstract: This document describes techniques for decoding a convolutionally coded signal using a trellis decoder in a drift robust manner. A convolutionally coded and differentially modulated signal may be received. The signal may be decoded using a trellis. A noise prediction loop may be used to reduce noise characteristics of the signal. A frequency offset estimation loop may be used to reduce a frequency offset drift of the signal. The noise prediction loop and the frequency offset estimation loop may be applied at each branch of the trellis.
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公开(公告)号：US20160164633A1
公开(公告)日：2016-06-09
申请号：US14560012
申请日：2014-12-04
Applicant: Apple Inc.
Inventor： Yuval Avner , Gilad Kirshenberg
CPC classification number: H04L1/0054 , H04L1/006 , H04L25/03057
Abstract: A modified Viterbi algorithm, that integrates decision feedback equalization (DFE), is disclosed. The modified algorithm may be used especially for rate 1/2 coded transmissions through additive noise channels, where the additive noise is one-tap filtered noise. Each state in the presently-disclosed trellis holds an aggregate error and an aggregate weight of the winner path terminating at that state. Each branch of the trellis carries one or more aggregate errors, where each of the aggregate errors includes a contribution from the aggregate error of the branch's source state as well as a contribution from the difference between an expected symbol of the branch and a corresponding received symbol.
Abstract translation: 公开了一种整合了决策反馈均衡（DFE）的修正维特比算法。 修改的算法可以特别用于通过加性噪声信道的速率1/2编码的传输，其中加性噪声是单抽头滤波噪声。 当前披露的网格中的每个状态持有在该状态终止的获胜者路径的总误差和总重量。 网格的每个分支携带一个或多个聚合错误，其中每个聚合错误包括来自分支的源状态的聚合误差的贡献以及来自分支的预期符号与对应的接收符号之间的差的贡献 。
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公开(公告)号：US10601429B2
公开(公告)日：2020-03-24
申请号：US16031602
申请日：2018-07-10
Applicant: Apple Inc.
Inventor： Mik Cohen , Shahar Meir , Yuval Avner
Abstract: Methods and systems for substantially simultaneously scan of two or more frequencies using one transceiver are discussed herein. For example, a listening device can include a controller configured to control its transceiver to alternate between two or more frequencies from two or more sets of frequencies. The controller is also configured to capture a portion of a preamble of a received signal to determine whether the received signal is intended for the listening device.
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公开(公告)号：US09860095B1
公开(公告)日：2018-01-02
申请号：US15196275
申请日：2016-06-29
Applicant: Apple Inc.
Inventor： Yuval Avner
IPC: H04L27/148 , H04W4/00 , H04L27/22
CPC classification number: H04L27/148 , H04L27/22 , H04W4/80
Abstract: This document describes techniques for performing non-coherent demodulation of a differentially modulated signal in a drift robust manner. A differentially modulated signal, including a plurality of symbols, may be received. Non-coherent domodulation of the differentially modulated signal may be performed. The non-coherent demodulation may include performing noise prediction using a high-pass filtered estimated error signal associated with the differentially modulated signal. In some embodiments, frequency offset estimation to reduce frequency offset of the differentially modulated signal may also be performed as part of the non-coherent demodulation.
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Patent Agency Ranking
公开(公告)号：US09444581B2
公开(公告)日：2016-09-13
申请号：US14560012
申请日：2014-12-04
Applicant: Apple Inc.
Inventor： Yuval Avner , Gilad Kirshenberg
CPC classification number: H04L1/0054 , H04L1/006 , H04L25/03057
Abstract: A modified Viterbi algorithm, that integrates decision feedback equalization (DFE), is disclosed. The modified algorithm may be used especially for rate ½ coded transmissions through additive noise channels, where the additive noise is one-tap filtered noise. Each state in the presently-disclosed trellis holds an aggregate error and an aggregate weight of the winner path terminating at that state. Each branch of the trellis carries one or more aggregate errors, where each of the aggregate errors includes a contribution from the aggregate error of the branch's source state as well as a contribution from the difference between an expected symbol of the branch and a corresponding received symbol.
Abstract translation: 公开了一种整合了决策反馈均衡（DFE）的修正维特比算法。 修改的算法可以特别用于通过加性噪声信道的速率½编码传输，其中加性噪声是单抽头滤波噪声。 当前披露的网格中的每个状态持有在该状态终止的获胜者路径的总误差和总重量。 网格的每个分支携带一个或多个聚合错误，其中每个聚合错误包括来自分支的源状态的聚合误差的贡献以及来自分支的预期符号与对应的接收符号之间的差的贡献 。
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公开(公告)号：US10742449B1
公开(公告)日：2020-08-11
申请号：US16438527
申请日：2019-06-12
Applicant: Apple Inc.
Inventor： Yuval Avner , Michael Kerner , Ran Forte
IPC: H04L25/02
Abstract: Embodiments are presented herein of apparatuses, systems, and methods for a wireless device to perform improved channel estimates for sensing applications such as ranging. The wireless device may determine noise characteristics, e.g., a spectrum of the variance of noise on a channel and may use the noise characteristics to estimate a response of an analog front end of the wireless device. The wireless device may correct a channel estimate based on the estimated response of the analog front end.
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公开(公告)号：US20200021299A1
公开(公告)日：2020-01-16
申请号：US16031602
申请日：2018-07-10
Applicant: Apple Inc.
Inventor： Mik COHEN , Shahar Meir , Yuval Avner
Abstract: Methods and systems for substantially simultaneously scan of two or more frequencies using one transceiver are discussed herein. For example, a listening device can include a controller configured to control its transceiver to alternate between two or more frequencies from two or more sets of frequencies. The controller is also configured to capture a portion of a preamble of a received signal to determine whether the received signal is intended for the listening device.
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公开(公告)号：US09979576B2
公开(公告)日：2018-05-22
申请号：US15454172
申请日：2017-03-09
Applicant: Apple Inc.
Inventor： Yuval Avner
Abstract: This document describes techniques for decoding a convolutionally coded signal using a trellis decoder in a drift robust manner. A convolutionally coded and differentially modulated signal may be received. The signal may be decoded using a trellis. A noise prediction loop may be used to reduce noise characteristics of the signal. A frequency offset estimation loop may be used to reduce a frequency offset drift of the signal. The noise prediction loop and the frequency offset estimation loop may be applied at each branch of the trellis.
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公开(公告)号：US20180006853A1
公开(公告)日：2018-01-04
申请号：US15196275
申请日：2016-06-29
Applicant: Apple Inc.
Inventor： Yuval Avner
IPC: H04L27/148 , H04W4/00 , H04L27/22
CPC classification number: H04L27/148 , H04L27/22 , H04W4/80
Abstract: This document describes techniques for performing non-coherent demodulation of a differentially modulated signal in a drift robust manner. A differentially modulated signal, including a plurality of symbols, may be received. Non-coherent demodulation of the differentially modulated signal may be performed. The non-coherent demodulation may include performing noise prediction using a high-pass filtered estimated error signal associated with the differentially modulated signal. In some embodiments, frequency offset estimation to reduce frequency offset of the differentially modulated signal may also be performed as part of the non-coherent demodulation.
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