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公开(公告)号：US20240195454A1
公开(公告)日：2024-06-13
申请号：US18418693
申请日：2024-01-22
发明人： Rui Yu , Xuesong Chen , Supeng Liu , Lei Wang , Zhan Yu , Thengtee Yeo
IPC分类号： H04B5/20
CPC分类号： H04B5/20
摘要： A near-field communication (NFC) apparatus includes a clock extractor configured to perform clock recovery based on a first carrier signal sent by an NFC card reader to obtain a field clock signal; a digital phase-locked loop configured to perform frequency tracking on the field clock signal to output a first clock signal; a digital baseband chip configured to perform load modulation based on the first clock signal to generate a second carrier signal; and a controller configured to detect a frequency or a phase of the field clock signal, and selectively perform open-loop control on the digital phase-locked loop based on a detection result.
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公开(公告)号：US20230342971A1
公开(公告)日：2023-10-26
申请号：US18338995
申请日：2023-06-21
摘要： A system is provided for determining a location of a receiver in an enclosed space whereby its location is obtained based on information associated with at least two transmitters that are provided within the enclosed pace. In particular, once the images of the transmitters are captured by an image capturing module provided within the receiver, the receiver is configured to process the captured image, and based on the outcome of this process, to determine its location in the enclosed space.
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公开(公告)号：US11888614B2
公开(公告)日：2024-01-30
申请号：US17704869
申请日：2022-03-25
发明人： Shengchen Dai , Jiajie Tong , Zhan Yu , Kai Fu , Rong Li , Jun Wang
IPC分类号： H04L1/00
CPC分类号： H04L1/0057 , H04L1/0007 , H04L1/0041
摘要： A method includes determining, based on a length of to-be-encoded information bits and a code rate, a code length N after encoding; determining, based on N, a minimum segment code length and a maximum segment code length, a reserved segment quantity of each type of segments in segments of b−a+1 types of segment code lengths and a reserved code length corresponding to N, where the minimum segment code length is 2{circumflex over ( )}a, and the maximum segment code length is 2{circumflex over ( )}b; determining a segment quantity of each type of segments based on N, the reserved code length, a segment code length of each type of segments, and the reserved segment quantity, where N corresponds to S segments, and a segment code length of an ith segment in the S segments is greater than or equal to a segment code length of an (i+1)th segment in the S segments.
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公开(公告)号：US20230113453A1
公开(公告)日：2023-04-13
申请号：US17968279
申请日：2022-10-18
发明人： Huazhang Liu , Zhan Yu , Tong Chen
摘要： An audio data transmission method includes encapsulating, based on a physical layer frame header, a protocol data unit (PDU) including audio data, to obtain an audio data packet, where the physical layer frame header is modulated using a first digital modulation scheme, the PDU is modulated using a second digital modulation scheme, a value of a modulation rate of the first digital modulation scheme is equal to a value of a data transmission rate, and a value of a modulation rate of the second digital modulation scheme is less than the value of the data transmission rate, and sending the audio data packet on a BLUETOOTH low energy (BLE) physical channel at the data transmission rate.
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公开(公告)号：US11489614B2
公开(公告)日：2022-11-01
申请号：US16992600
申请日：2020-08-13
发明人： Huazhang Liu , Zhan Yu , Tong Chen
IPC分类号： H04L25/00 , H04L27/00 , H04L1/00 , H04W4/80 , H04L27/10 , H04L27/18 , H04L45/74 , H04L69/323
摘要： An audio data transmission method includes encapsulating, based on a physical layer frame header, a protocol data unit (PDU) including audio data, to obtain an audio data packet, where the physical layer frame header is modulated using a first digital modulation scheme, the PDU is modulated using a second digital modulation scheme, a value of a modulation rate of the first digital modulation scheme is equal to a value of a data transmission rate, and a value of a modulation rate of the second digital modulation scheme is less than the value of the data transmission rate, and sending the audio data packet on a BLUETOOTH low energy (BLE) physical channel at the data transmission rate.
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公开(公告)号：US20200374030A1
公开(公告)日：2020-11-26
申请号：US16992600
申请日：2020-08-13
发明人： Huazhang Liu , Zhan Yu , Tong Chen
摘要： An audio data transmission method includes encapsulating, based on a physical layer frame header, a protocol data unit (PDU) including audio data, to obtain an audio data packet, where the physical layer frame header is modulated using a first digital modulation scheme, the PDU is modulated using a second digital modulation scheme, a value of a modulation rate of the first digital modulation scheme is equal to a value of a data transmission rate, and a value of a modulation rate of the second digital modulation scheme is less than the value of the data transmission rate, and sending the audio data packet on a BLUETOOTH low energy (BLE) physical channel at the data transmission rate.
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公开(公告)号：US11870564B2
公开(公告)日：2024-01-09
申请号：US17968279
申请日：2022-10-18
发明人： Huazhang Liu , Zhan Yu , Tong Chen
CPC分类号： H04L1/0002 , H04L27/10 , H04L27/18 , H04L45/74 , H04L69/323 , H04W4/80 , H04L2212/00
摘要： An audio data transmission method includes encapsulating, based on a physical layer frame header, a protocol data unit (PDU) including audio data, to obtain an audio data packet, where the physical layer frame header is modulated using a first digital modulation scheme, the PDU is modulated using a second digital modulation scheme, a value of a modulation rate of the first digital modulation scheme is equal to a value of a data transmission rate, and a value of a modulation rate of the second digital modulation scheme is less than the value of the data transmission rate, and sending the audio data packet on a BLUETOOTH low energy (BLE) physical channel at the data transmission rate.
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公开(公告)号：US20220224441A1
公开(公告)日：2022-07-14
申请号：US17704869
申请日：2022-03-25
发明人： Shengchen Dai , Jiajie Tong , Zhan Yu , Kai Fu , Rong Li , Jun Wang
IPC分类号： H04L1/00
摘要： This application discloses a method: determining, based on a length of to-be-encoded information bits and a code rate, a code length N after encoding; determining, based on N, a minimum segment code length, and a maximum segment code length, a reserved segment quantity of each type of segments in segments of b−a+1 types of segment code lengths and a reserved code length corresponding to N, where the minimum segment code length is 2{circumflex over ( )}a, and the maximum segment code length is 2{circumflex over ( )}b; determining a segment quantity of each type of segments based on N, the reserved code length, a segment code length of each type of segments, and the reserved segment quantity of each type of segments, where N corresponds to S segments, and a segment code length of an ith segment in the S segments is greater than or equal to a segment code length of an (i+1)th segment in the S segments.
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