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11.发明申请公开(公告)号：US20220217710A1
公开(公告)日：2022-07-07
申请号：US17141725
申请日：2021-01-05
Inventor： Yaming Luo , Yunxiang Yao , Man Wai Kwan , Xiangyu Liu , Shuaimin Jiang , Kong Chau Tsang
Abstract: Described is a method and device for detecting a discontinuous transmission (DTX) state or a partial DTX state at an uplink control information (UCI) receiver in a wireless communication system. The method comprises receiving a linear block encoded signal on an uplink (UL) at said UCI receiver and processing said signal after resource element (RE) demapping to obtain a soft bit sequence. The soft bit sequence is then transformed into multiple sub-sequences. Correlation metrics are determined for two or more of the multiple sub-sequences or two or more sub-sequence groups derived from the multiple sub-sequences or sequence segments derived from the sub-sequence groups. Then, a determination is made if a DTX state has occurred by evaluating the determined correlation metrics.
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12.发明申请SYSTEMS AND METHODS FOR USING HIGH PROBABILITY AREA AND AVAILABILITY PROBABILITY DETERMINATIONS FOR WHITE SPACE CHANNEL IDENTIFICATION 审中-公开使用高可靠性领域的系统和方法以及空白通道识别的可用性概率确定公开(公告)号：US20160302196A1
公开(公告)日：2016-10-13
申请号：US14682568
申请日：2015-04-09
Inventor： Xiang Chen , Eddy Chiu , Man Wai Kwan , Kong Chau Tsang
CPC classification number: H04W24/08 , H04W16/14 , H04W72/044
Abstract: Systems and methods which provide white space channel identification and/or selection using high probability area determinations for a device and availability probability calculations for channels based on a probability model are described. A white space device (WSD) may utilize spectrum scanner sensing results to determine one or more course high probability area (HPA) for the WSD. The sensing results may further be analyzed to derive probability information regarding the WSD being located at the HPAs, to thereby refine the HPAs. Thereafter, the information regarding probabilities of the WSD being located at the HPAs may be utilized with information from a white space location database to determine an availability probability of one or more white space channels. One or more such white space channels may be identified and/or selected for use by the WSD.
Abstract translation: 描述了使用基于概率模型的信道的高概率区域确定和可用性概率计算提供空白信道标识和/或选择的系统和方法。 白空间设备（WSD）可以利用光谱扫描器感测结果来确定WSD的一个或多个过程高概率区域（HPA）。 可以进一步分析感测结果以导出关于位于HPA处的WSD的概率信息，从而改进HPA。 此后，关于位于HPA处的WSD的概率的信息可以与来自白空间位置数据库的信息一起使用，以确定一个或多个空白信道的可用性概率。 可以识别和/或选择一个或多个这样的空白通道供WSD使用。
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13.发明授权公开(公告)号：US11457502B2
公开(公告)日：2022-09-27
申请号：US17171190
申请日：2021-02-09
Inventor： Yaming Luo , Yunxiang Yao , Man Wai Kwan , Xiangyu Liu , Yiu Wing Edwin Chan , Kong Chau Tsang
Abstract: Described is a method and device for detecting a discontinuous transmission state (DTX) at an uplink control information (UCI) receiver device in a wireless communication system. The method involves receiving a linear block encoded signal on an uplink (UL) at said UCI receiver device and processing the received linear block encoded signal after resource element (RE) dernapping to obtain channel estimation data. The method includes determining from said channel estimation data a DTX metric for one or more selected resource blocks (RBs) and determining if a DTX state has occurred by comparing the determined DTX metric to a calculated, selected, or predetermined threshold.
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14.发明授权公开(公告)号：US11363578B2
公开(公告)日：2022-06-14
申请号：US16827883
申请日：2020-03-24
Inventor： Yaming Luo , Man Wai Kwan , Xiangyu Liu , Kanghao Jia , Kong Chau Tsang
Abstract: Described is a method and device for processing a signal received at an uplink control information (UCI) receiver in a wireless communication system. The method comprises processing a signal received on an uplink (UL) at said UCI receiver to transform said received signal into a likelihood calculation of possible transmitted codewords (θ1 . . . θi . . . θN). The likelihood calculation of possible transmitted codewords (θ1 . . . θi . . . θN) may comprise a multi-dimensional discrete Fourier transform (DFT) (θ1 . . . θi . . . θN) of said received signal. The multi-dimensional may be formed as a Hadamard Transform. The method includes determining a maximum magnitude θmax value from said likelihood calculation of possible transmitted codewords (θ1 . . . θi . . . θN) and then comparing said θmax value to a selected, calculated or predetermined scaled threshold c·τ where τ is a threshold and c is a scaling factor for the threshold τ. The comparison is such that, where θmax>c·τ, it is determined that the signal received on the UL at said UCI receiver comprises a linear block encoded signal. In some cases, the scaling factor c may be omitted.
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公开(公告)号：US11197279B1
公开(公告)日：2021-12-07
申请号：US16922150
申请日：2020-07-07
Inventor： Kanghao Jia , Yuxian Zhang , Man Wai Kwan , Kong Chau Tsang
Abstract: Described is a method and apparatus for processing an uplink (UL) signal at a Physical Uplink Control Channel (PUCCH) in a wireless communication system to determine a discontinuous transmission (DTX) state. The method comprises receiving a UL channel signal at a PUCCH receiver apparatus and, after resource element (RE) demapping of said received UL channel signal in said PUCCH receiver apparatus, normalizing a signal power of at least one signal element or resource. The normalized power is compared to a selected, calculated or predetermined threshold and, based on said comparison, a determination is made on whether or not a DTX state has occurred.
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Patent Agency Ranking
16.发明授权公开(公告)号：US11026278B2
公开(公告)日：2021-06-01
申请号：US16561710
申请日：2019-09-05
Inventor： Yun Hou , Yuyi Mao , Eddy Chiu , Xiangyu Liu , Yaming Luo , Man Wai Kwan , Kong Chau Eric Tsang
Abstract: Described is a method of decoding a physical sidelink shared channel (PSSCH) involving physical sidelink control channel (PSCCH) resource grid search space reduction, timing offset (TO) estimation, and reference symbol identification. Resource grid search space reduction may include identifying resource blocks (RBs) having a signal power below a first threshold such that said RBs can be excluded from further processing. Search space reduction may additionally or alternatively include identifying RB pairs where a difference in signal power between the RBs comprising each pair of RBs is above a second threshold and excluding any such said RB pairs from further processing. TO compensation may include circularly correlating TO-compensated received DMRSs and their corresponding local DMRSs to obtain energy or power profiles. From the energy/power profiles, a subset L of highest stored power values and their corresponding cyclic shift (ncs) values can be chosen where said power values are equal to or exceed a third threshold. The selected subset L can be made available for use in a decoding process for a received channel signal.
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17.发明申请公开(公告)号：US20210076433A1
公开(公告)日：2021-03-11
申请号：US16561710
申请日：2019-09-05
Inventor： Yun Hou , Yuyi Mao , Eddy Chiu , Xiangyu Liu , Yaming Luo , Man Wai Kwan , Kong Chau Eric Tsang
Abstract: Described is a method of decoding a physical sidelink shared channel (PSSCH) involving physical sidelink control channel (PSCCH) resource grid search space reduction, timing offset (TO) estimation, and reference symbol identification. Resource grid search space reduction may include identifying resource blocks (RBs) having a signal power below a first threshold such that said RBs can be excluded from further processing. Search space reduction may additionally or alternatively include identifying RB pairs where a difference in signal power between the RBs comprising each pair of RBs is above a second threshold and excluding any such said RB pairs from further processing. TO compensation may include circularly correlating TO-compensated received DMRSs and their corresponding local DMRSs to obtain energy or power profiles. From the energy/power profiles, a subset L of highest stored power values and their corresponding cyclic shift (ncs) values can be chosen where said power values are equal to or exceed a third threshold. The selected subset L can be made available for use in a decoding process for a received channel signal.
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18.发明申请公开(公告)号：US20200235864A1
公开(公告)日：2020-07-23
申请号：US16254964
申请日：2019-01-23
Inventor： Nan Li , Xiangyu Liu , Yuxian Zhang , Man Wai Kwan , Ho Yin Chan , Kong Chau Tsang
Abstract: Provided is a method for determining a Hybrid Automatic Repeat Request (HARQ) transmission signal. The method comprises receiving soft bits from a wireless communication physical channel uplink signal, said received soft bits being deemed to comprise HARQ LLRs and soft decoding said HARQ LLRs to output a hard ACK/NACK decision. The method includes processing said HARQ LLRs based on said hard ACK/NACK decision such that the processed HARQ LLRs map to a same or identical constellation point or points if the physical channel uplink signal contains an ACK or NACK transmission signal. The method also includes using said processed HARQ LLRs to determine if the physical channel uplink signal contains an ACK or NACK transmission signal or to determine if the physical channel uplink signal comprises discontinuous transmission (DTX).
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19.发明授权公开(公告)号：US09698836B2
公开(公告)日：2017-07-04
申请号：US14665819
申请日：2015-03-23
Inventor： Wen Qin , Yuanyuan Du , Jiewei Ding , Man Wai Kwan , Angus Chi Keung Mak , Kong Chau Tsang
IPC: H04B1/10 , H04B1/04 , H04B17/345 , H04L5/14
CPC classification number: H04B1/1027 , H03F3/24 , H04B1/0475 , H04B17/345 , H04B2001/0408 , H04L5/14
Abstract: Systems and methods which provide mitigation of self-interference in spectrally efficient full duplex (e.g., transmit and receive using the same frequency simultaneously) communications are described. Embodiments provide an interference mitigation structure having a multi-tap vector modulator interference cancellation circuit operable to cancel time varying multipath interference in the analog RF domain. A multi-tap vector modulator interference cancellation circuit of embodiments may comprise part of a multi-stage interference cancellation circuit, such as a multi-stage interference cancellation circuit comprising a multi-tap vector modulator interference cancellation circuit and a digital residual interference cancellation circuit. A digital residual interference cancellation circuit of embodiments provides residual interference cancellation. A multi-stage interference cancellation circuit configuration of embodiments is operable to provide cancellation of strong multipath signals as well as cancellation of residual multipath signals, including interference in the received signal associated with circulator leakage, antenna reflection and multipath.
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20.发明申请公开(公告)号：US20160285486A1
公开(公告)日：2016-09-29
申请号：US14665819
申请日：2015-03-23
Inventor： Wen Qin , Yuanyuan Du , Jiewei Ding , Man Wai Kwan , Angus Chi Keung Mak , Kong Chau Tsang
IPC: H04B1/10 , H04B17/345 , H04L5/14 , H04B1/04
CPC classification number: H04B1/1027 , H03F3/24 , H04B1/0475 , H04B17/345 , H04B2001/0408 , H04L5/14
Abstract: Systems and methods which provide mitigation of self-interference in spectrally efficient full duplex (e.g., transmit and receive using the same frequency simultaneously) communications are described. Embodiments provide an interference mitigation structure having a multi-tap vector modulator interference cancellation circuit operable to cancel time varying multipath interference in the analog RF domain. A multi-tap vector modulator interference cancellation circuit of embodiments may comprise part of a multi-stage interference cancellation circuit, such as a multi-stage interference cancellation circuit comprising a multi-tap vector modulator interference cancellation circuit and a digital residual interference cancellation circuit. A digital residual interference cancellation circuit of embodiments provides residual interference cancellation. A multi-stage interference cancellation circuit configuration of embodiments is operable to provide cancellation of strong multipath signals as well as cancellation of residual multipath signals, including interference in the received signal associated with circulator leakage, antenna reflection and multipath.
Abstract translation: 描述了在频谱上有效的全双工（例如，同时使用相同频率进行发送和接收）通信中减轻自干扰的系统和方法。 实施例提供了具有多抽头矢量调制器干扰消除电路的干扰减轻结构，其可用于消除模拟RF域中的时变多径干扰。 实施例的多抽头矢量调制器干扰消除电路可以包括多级干扰消除电路的一部分，例如包括多抽头矢量调制器干扰消除电路和数字残留干扰消除电路的多级干扰消除电路。 实施例的数字残留干扰消除电路提供残余干扰消除。 实施例的多级干扰消除电路配置可操作以提供强多径信号的消除以及残留多径信号的消除，包括与循环器泄漏，天线反射和多路径相关联的接收信号中的干扰。
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