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1.发明申请公开(公告)号：US20220217714A1
公开(公告)日：2022-07-07
申请号：US17143379
申请日：2021-01-07
Inventor： Yaming Luo , Yunxiang Yao , Man Wai Kwan , Xiangyu Liu , Ying Lun Tsui , Kong Chau Tsang
Abstract: Described is a method of 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) and determining a maximum magnitude θmax value from said likelihood calculation. The method includes comparing said maximum magnitude θmax value to a selected, calculated or predetermined scaled threshold S·τ where τ is a threshold and S is a scaling factor for the threshold τ. The comparison step is such that, where |θmax|2>S·τ, the method comprises determining that the signal received comprises a linear block encoded signal. In the method, prior to said comparison step, the scaling factor S is selected from a plurality of scaling factor options. One scaling factor option (i) is a scaling factor SRE derived from a combination of estimated noise and/or signal power at an output of a resource element (RE) demapper module and an estimated channel response from/before an equalizer module of said UCI receiver. The options also include using a combination of SRE and a suitable scaling factor derived excluding option (i).
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2.发明授权公开(公告)号：US11375486B1
公开(公告)日：2022-06-28
申请号：US17143379
申请日：2021-01-07
Inventor： Yaming Luo , Yunxiang Yao , Man Wai Kwan , Xiangyu Liu , Ying Lun Tsui , Kong Chau Tsang
Abstract: Described is a method of 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) and determining a maximum magnitude θmax value from said likelihood calculation. The method includes comparing said maximum magnitude θmax value to a selected, calculated or predetermined scaled threshold S·τ where τ is a threshold and S is a scaling factor for the threshold τ. The comparison step is such that, where |θmax|2>S·τ, the method comprises determining that the signal received comprises a linear block encoded signal. In the method, prior to said comparison step, the scaling factor S is selected from a plurality of scaling factor options. One scaling factor option (i) is a scaling factor SRE derived from a combination of estimated noise and/or signal power at an output of a resource element (RE) demapper module and an estimated channel response from/before an equalizer module of said UCI receiver. The options also include using a combination of SRE and a suitable scaling factor derived excluding option (i).
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公开(公告)号：US10334516B1
公开(公告)日：2019-06-25
申请号：US15920026
申请日：2018-03-13
Inventor： Zhonghui Zhang , Xiangyu Liu , Yuxian Zhang , Man Wai Kwan , Kong Chau Tsang
IPC: H04W48/16 , H04B17/318 , H04W56/00
Abstract: The present disclosure relates to methods, devices, and systems for cell identification. For example, the systems, devices, and methods described herein may be used to detecting a secondary synchronization signal (SSS) index. In an aspect of the present disclosure, a method includes detecting, at an electronic device, a first SSS index based on a comparison between a first power value and a first threshold. The first power value is associated with a correlation power result between a received signal from a base station and a local SSS. The method also include determining, at the electronic device, a second threshold based on the first power value, and performing a comparison between a second power value and the second threshold. The second power value is determined based on the received signal.
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4.发明授权公开(公告)号：US12160923B2
公开(公告)日：2024-12-03
申请号：US17680727
申请日：2022-02-25
Inventor： Yaming Luo , Man Wai Kwan , Xiangyu Liu , Yanda Mou , Kong Chau Tsang
Abstract: 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 {right arrow over (s)}. The method includes selecting a plurality of bits in said generated soft bit sequence {right arrow over (s)} as comparison bits and comparing said selected comparison bits to corresponding bits in a reconstructed soft bit sequence {right arrow over (r)}. The reconstructed soft bit sequence {right arrow over (r)} is generated from a plurality of bits selected as reconstruction bits in said generated soft bit sequence {right arrow over (s)}. A comparison or correlation metric is determined between the comparison bits and the corresponding bits in the reconstructed soft bit sequence {right arrow over (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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5.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
Inventor： Yaming Luo , Man Wai Kwan , Xiangyu Liu , Yanda Mou , Kong Chau Tsang
CPC classification number: H04W76/28 , G06F17/16 , H04L1/0058 , H04W72/0413
Abstract: 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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Patent Agency Ranking
公开(公告)号：US20210289486A1
公开(公告)日：2021-09-16
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 said resource grid associated with said PSCCH candidate to determine one or more potential PSCCHs for decoding, each of said one or more potential PSCCHs being identified by resource block (RB) position in the resource grid and a corresponding DMRS cyclic shift (ncs) value. The foregoing step is repeated for at least one other DMRS in said subframe to determine one or more potential PSCCHs for said at least one other DMRS. Then, a subset L of PSCCHs is selected from said potential PSCCHs whereby said 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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公开(公告)号：US20200266925A1
公开(公告)日：2020-08-20
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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8.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
Inventor： Yaming Luo , Yunxiang Yao , Man Wai Kwan , Xiangyu Liu , Shuaimin Jiang , Kong Chau Tsang
IPC: H04W72/21 , H04L5/00 , H04L1/00 , H04L1/1607 , H04L1/1829
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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9.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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10.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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