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公开(公告)号：US11882062B2
公开(公告)日：2024-01-23
申请号：US17349801
申请日：2021-06-16
申请人： NXP USA, Inc.
发明人： Rui Cao , Hongyuan Zhang , Yan Zhang , Liwen Chu
CPC分类号： H04L5/0007 , H04L1/246 , H04L5/0048 , H04W76/15
摘要： Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves encoding bits in a Physical Layer Protocol Data Unit (PPDU) using a basic bandwidth that is smaller than a signal bandwidth, wherein the bits are duplicated within the PPDU, and transmitting the PPDU with duplicated bits in accordance with a power spectrum density (PSD) limit.
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公开(公告)号：US11533209B2
公开(公告)日：2022-12-20
申请号：US16907848
申请日：2020-06-22
申请人： NXP USA, INC.
发明人： Yan Zhang , Hongyuan Zhang , Rui Cao
摘要： A communication device receives a physical layer (PHY) protocol data unit (PPDU). The PPDU includes i) a PHY preamble and ii) PHY data portion that includes one or more PHY midambles, and the PHY preamble includes i) an indication of a length of the PPDU, and ii) an indication of a periodicity of PHY midambles in the PHY data portion. The communication device calculates a number of PHY midambles in the PPDU using i) the indication of the length of the PPDU, and ii) the indication of the periodicity of PHY midambles. The communication device calculates a reception time for the PPDU using the calculated number of PHY midambles, and processes the PPDU using the calculated reception time.
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公开(公告)号：US11431641B2
公开(公告)日：2022-08-30
申请号：US16049739
申请日：2018-07-30
申请人： NXP USA, Inc.
发明人： Xiayu Zheng , Yan Zhang , Hongyuan Zhang
IPC分类号： H04L47/25 , H04L1/00 , H04L1/20 , H04W84/12 , H04L43/0823
摘要： A communication device stores a master rate table, which comprises a plurality of rows that correspond to i) respective data rates, and ii) respective sets of communication parameter values corresponding to the respective sets of data rates. Each set of communication parameter values includes i) a default value of a parameter, and iii) one or more alternative values of the parameter. When the communication device determines that a new transmission rate should be used, and when a current set of communication parameter values corresponds to a row in the master rate table and includes the default value, the communication device selects a trial set of communication parameter values corresponding to the row of the master rate table, and including one of the alternative values. The communication device measures an error rate measure corresponding to use of the trial set of communication parameter values.
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公开(公告)号：US11343026B1
公开(公告)日：2022-05-24
申请号：US16689107
申请日：2019-11-20
申请人： NXP USA, Inc.
发明人： Liwen Chu , Rui Cao , Hongyuan Zhang , Hui-Ling Lou , Yan Zhang
摘要： A method for Wireless Local-Area Network (WLAN) communication in a WLAN device includes receiving from a remote WLAN device an announcement of a maximal Hybrid Automatic Repeat Request (HARQ) buffering capability of a receiver of the remote WLAN device. A HARQ Physical-layer Protocol Data Unit (HARQ PPDU), which includes one or more HARQ coding units, is constructed in the WLAN device in response to the announcement. The HARQ PPDU is transmitted from the WLAN device to the remote WLAN device. One or more of the HARQ coding units are retransmitted in response to a request from the remote WLAN device.
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公开(公告)号：US11134493B2
公开(公告)日：2021-09-28
申请号：US16583295
申请日：2019-09-26
申请人： NXP USA, Inc.
发明人： Yan Zhang , Hongyuan Zhang
摘要： A method for Wireless Local-Area Network (WLAN) communication in a WLAN device includes generating a WLAN transmission including first bits, by at least (i) encoding the first bits with a Forward Error Correction (FEC) code to produce first encoded bits, and (ii) scrambling the first encoded bits with a first scrambling sequence. The WLAN transmission is transmitted from the WLAN device to a remote WLAN device. In response to receiving from the remote WLAN device an indication that reception of the WLAN transmission has failed, a WLAN retransmission including second bits is generated. Generating the retransmission includes (i) obtaining second encoded bits, which include the second bits encoded with the FEC code, and (ii) scrambling the second encoded bits with a second scrambling sequence that is different from the first scrambling sequence. The WLAN retransmission is transmitted from the WLAN device to the remote WLAN device.
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公开(公告)号：US20240137791A1
公开(公告)日：2024-04-25
申请号：US18492273
申请日：2023-10-22
申请人： NXP USA, Inc.
发明人： Rui Cao , Rong Zhang , Yan Zhang , Hongyuan Zhang
IPC分类号： H04W24/08
摘要： One example discloses a method of interference estimation for communications between WLAN (wireless local area network) devices, including: adding a set of interference estimation attributes to a PPDU; transmitting the PPDU from and receiving the PPDU at a WLAN device; and estimating a set of interference statistics, by the WLAN device, by comparing the set of interference estimation attributes to a corresponding set of predefined attribute values.
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公开(公告)号：US11483038B1
公开(公告)日：2022-10-25
申请号：US16569269
申请日：2019-09-12
申请人： NXP USA, Inc.
发明人： Bo Yu , Xiayu Zheng , Yan Zhang , Jinjing Jiang
IPC分类号： H04B7/0452 , H04W72/12 , H04B7/0417 , H04B7/06 , H04W84/12
摘要： A method for grouping a plurality of client stations in a wireless local area network is disclosed herein. An access point (AP) determines the channel correlation and a distance to the AP for each of the client stations. The AP selects a smaller subset of client stations that meet a threshold requirement determined based on the respective distances between the client stations and the AP.
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公开(公告)号：US20200322197A1
公开(公告)日：2020-10-08
申请号：US16907848
申请日：2020-06-22
申请人： NXP USA, INC.
发明人： Yan Zhang , Hongyuan Zhang , Rui Cao
摘要： A communication device receives a physical layer (PHY) protocol data unit (PPDU). The PPDU includes i) a PHY preamble and ii) PHY data portion that includes one or more PHY midambles, and the PHY preamble includes i) an indication of a length of the PPDU, and ii) an indication of a periodicity of PHY midambles in the PHY data portion. The communication device calculates a number of PHY midambles in the PPDU using i) the indication of the length of the PPDU, and ii) the indication of the periodicity of PHY midambles. The communication device calculates a reception time for the PPDU using the calculated number of PHY midambles, and processes the PPDU using the calculated reception time.
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公开(公告)号：US20240340026A1
公开(公告)日：2024-10-10
申请号：US18629795
申请日：2024-04-08
申请人： NXP USA, Inc.
发明人： Amer Al-Baidhani , Yan Zhang , Rui Cao , Sudhir Srinivasa , Hongyuan Zhang
CPC分类号： H03M13/255 , H04L1/0008 , H04L5/0007 , H04W84/12
摘要： Embodiments of a method and apparatus for wireless communications are disclosed. In an embodiment, a wireless device includes a controller configured to generate a control signal and a wireless transceiver configured to, in response the control signal, perform a low-density parity-check (LDPC) encoding operation to generate an encoded data unit with extra LDPC symbol segments.
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公开(公告)号：US20240178931A1
公开(公告)日：2024-05-30
申请号：US18523816
申请日：2023-11-29
申请人： NXP USA, Inc.
发明人： Yan Zhang , Amer Al-Baidhani , Rui Cao
CPC分类号： H04L1/0003 , H04L5/0044 , H04W84/12
摘要： In an IEEE 802.11 wireless system, a wireless STA is configured to signal a plurality of different spatial stream encoding values to a second STA device in a wireless personal area network in accordance with IEEE 802.11 protocol by generating a signaling physical layer protocol data unit (PPDU) which comprises a dedicated user information field which directly or indirectly identifies a plurality of different modulation and coding selection (MCS) values or different modulation orders used to encode different spatial streams from a plurality of spatial streams Nss used in a beamformed MIMO transmission of a data packet for each scheduled user of the signaling PPDU.
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