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1.发明公开公开(公告)号：US20230276524A1
公开(公告)日：2023-08-31
申请号：US17680727
申请日：2022-02-25
发明人： Yaming Luo , Man Wai Kwan , Xiangyu Liu , Yanda Mou , Kong Chau Tsang
CPC分类号： H04W76/28 , G06F17/16 , H04L1/0058 , H04W72/0413
摘要： Described is a method and device for detecting a DTX state at a UCI receiver in a wireless communication system. The method comprises receiving a linear block encoded signal on an uplink at said UCI receiver and processing the received signal after resource element (RE) demapping to generate a soft bit sequence s. The method includes selecting a plurality of bits in said generated soft bit sequence s as comparison bits and comparing said selected comparison bits to corresponding bits in a reconstructed soft bit sequence r. The reconstructed soft bit sequence r is generated from a plurality of bits selected as reconstruction bits in said generated soft bit sequence s. A comparison or correlation metric is determined between the comparison bits and the corresponding bits in the reconstructed soft bit sequence r, and a determination is made of the occurrence of a DTX state by evaluating the determined comparison or correlation metric.
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2.发明申请公开(公告)号：US20200314863A1
公开(公告)日：2020-10-01
申请号：US16364335
申请日：2019-03-26
发明人： Zizhou Wang , Qifeng Liao , Jihui Zhang , Man Wai Kwan , Kong Chau Tsang
IPC分类号： H04W72/08 , H04L5/00 , H04W72/10 , H04B17/382 , H04B17/327 , H04J11/00
摘要： Described is a method of reducing uplink inter-cell interference in a cellular communications network. The method comprises identifying in a cell any user equipments (UEs) which are susceptible to interference (ISUs) from another UE, particularly another UE in a neighboring cell. The method includes identifying in said cell any UEs causing interference (ICUs) to at least one neighboring cell and, more particularly, causing interference to a UE in a neighboring cell. The identified ISUs and ICUs are combined into a priority list for frequency resource reservation or allocation in said cell. The method may include limiting the identification of ISUs and ICUs to a selected number of UEs within the cell.
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公开(公告)号：US10367594B2
公开(公告)日：2019-07-30
申请号：US15616002
申请日：2017-06-07
发明人： Ho Yin Chan , Chang Li , Man Wai Kwan , Yuxian Zhang , Kong Chau Tsang
摘要： Provided is a method of determining timing of arrival of a signal on a path to a receiver in a mobile wireless communications system. The method comprises obtaining a channel impulse response (CIR) of a signal received at the receiver and deriving a power characteristic of the CIR. The method includes producing a first derivative of the power characteristic with respect to time, selecting some or all extrema from the first derivative of the power characteristic as indicative of candidate signal paths, and selecting one or more of said candidate signal paths. The method preferably includes determining timing of arrival of a signal on a first path of arrival at the receiver by assessing an energy value of each of said candidate signal paths against a threshold value.
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公开(公告)号：US20220256642A1
公开(公告)日：2022-08-11
申请号：US17171190
申请日：2021-02-09
发明人： Yaming Luo , Yunxiang Yao , Man Wai Kwan , Xiangyu Liu , Yiu Wing Edwin Chan , Kong Chau Tsang
摘要： 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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5.发明申请公开(公告)号：US20210307000A1
公开(公告)日：2021-09-30
申请号：US16827883
申请日：2020-03-24
发明人： Yaming Luo , Man Wai Kwan , Xiangyu Liu , Kanghao Jia , Kong Chau Tsang
摘要： 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：US11057159B2
公开(公告)日：2021-07-06
申请号：US16254964
申请日：2019-01-23
发明人： Nan Li , Xiangyu Liu , Yuxian Zhang , Man Wai Kwan , Ho Yin Chan , Kong Chau Tsang
摘要： 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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7.发明申请公开(公告)号：US20180234149A1
公开(公告)日：2018-08-16
申请号：US15434115
申请日：2017-02-16
发明人： Yuxian Zhang , Man Wai Kwan , Eric Kong Chau Tsang
IPC分类号： H04B7/06 , H04L5/00 , H04B7/0413
CPC分类号： H04B7/0617 , H04B7/0413 , H04B7/0626 , H04B7/0632 , H04B7/0695 , H04L5/0048
摘要： Provided is a method of base station (BS) for channel state information (CSI) acquisition in a massive multiple input/multiple output (MIMO) communication system. The method comprises the steps at the BS of sending a set of beamformed reference signals (RSs) to a user equipment (UE) and receiving from said UE an indication of a subset of said set of beamformed RSs and CSI acquired by said UE for only said subset of said set of beamformed RSs. Also provided is a further method and a user equipment (UE) for CSI acquisition. The further method comprises the steps at the UE of receiving from the BS the set of beamformed RSs; estimating a channel of each RS comprising said set of beamformed RSs; selecting a subset of said set of beamformed RSs; acquiring CSI for only said selected subset of said set of beamformed RSs; and communicating to said BS an indication of said selected subset of said set of beamformed RSs and reporting the CSI acquired for said selected subset of said set of beamformed RSs.
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公开(公告)号：US10045237B2
公开(公告)日：2018-08-07
申请号：US14682568
申请日：2015-04-09
发明人： Xiang Chen , Eddy Chiu , Man Wai Kwan , Kong Chau Tsang
摘要： 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.
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9.发明授权公开(公告)号：US11611987B2
公开(公告)日：2023-03-21
申请号：US17141725
申请日：2021-01-05
发明人： Yaming Luo , Yunxiang Yao , Man Wai Kwan , Xiangyu Liu , Shuaimin Jiang , Kong Chau Tsang
IPC分类号： H04W72/21 , H04L5/00 , H04L1/00 , H04L1/1607 , H04L1/1829
摘要： 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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10.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
发明人： Yaming Luo , Yunxiang Yao , Man Wai Kwan , Xiangyu Liu , Shuaimin Jiang , Kong Chau Tsang
摘要： 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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