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11.发明申请公开(公告)号：US20220256642A1
公开(公告)日：2022-08-11
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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公开(公告)号：US11323986B2
公开(公告)日：2022-05-03
申请号：US16815144
申请日：2020-03-11
Inventor： Eddy Chiu , Yun Hou , Yuyi Mao , Xiangyu Liu , Ching Hong Chris Leung , Man Wai Victor Kwan , Kong Chau Eric Tsang
Abstract: Described is a method of decoding a physical sidelink control channel (PSCCH). The method comprises: for a PSCCH candidate in a resource grid, processing a received demodulation reference signal (DMRS) in a subframe of the resource grid associated with the PSCCH candidate to determine one or more potential PSCCHs for decoding, each of the one or more potential PSCCHs being identified by resource block (RB) position in the resource grid and a corresponding DMRS cyclic shift (ncs) value. This step is repeated for at least one other DMRS in the subframe to determine one or more potential PSCCHs for the at least one other DMRS. Then, a subset L of PSCCHs is selected from the potential PSCCHs. The selected subset L of PSCCHs together with their corresponding DMRS cyclic shift (ncs) values are made available for use in a decoding process for the received channel signal.
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13.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
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：US11057159B2
公开(公告)日：2021-07-06
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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15.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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Patent Agency Ranking
16.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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17.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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18.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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公开(公告)号：US10812221B2
公开(公告)日：2020-10-20
申请号：US16276003
申请日：2019-02-14
Inventor： Xiangyu Liu , Lu Yang , Eddy Chiu , Chenggang Lyu , Jun Zhu , Ching Hong Chris Leung , Man Wai Victor Kwan , Kong Chau Eric Tsang
Abstract: Systems and methods which provide for accurate decoding of a received channel signal when station identifier information is unknown. Embodiments accurately decode a physical downlink control channel (PDCCH), such as to obtain downlink control information (DCI), without knowing radio network temporary identifier (RNTI) information. An unknown station identifier information (USII) of embodiments uses redundancy reduction-based error checking (performing error checking between data decoded from a candidate control channel data block containing redundant data and a portion of that candidate control channel data block containing redundancy reduced data) for implementing decoding when station identifier information is unknown. Embodiments of a USII decoder may use a power detection technique for identifying candidate control channel data blocks used in redundancy reduction-based error checking operation.
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20.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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