公开(公告)号：US12081260B2

公开(公告)日：2024-09-03

申请号：US17951280

申请日：2022-09-23

申请人： Apple Inc.

发明人： Lochan Verma ,  Alexander Krebs ,  Yong Liu ,  Jinjing Jiang

IPC分类号： H04B1/7183 ,  H04W74/0808

CPC分类号： H04B1/7183 ,  H04W74/0808

摘要： Systems, methods, and mechanisms for an out-of-band (OOB) ultra-wide band (UWB) channel arbitration and/or channel coordination scheme. A device may scan an arbitration channel for a first time period, and based on the scanning, that the arbitration channel is not in use. The device may perform, on the arbitration channel, a first channel access procedure and perform, on the UWB channel, UWB communications during a UWB channel transmission opportunity.

公开(公告)号：US20240291514A1

公开(公告)日：2024-08-29

申请号：US18173213

申请日：2023-02-23

申请人： Ceva D.S.P. Ltd.

发明人： Cfir SABAN ,  Alexander YUFIT

IPC分类号： H04B1/7183

CPC分类号： H04B1/7183

摘要： A system and method for synchronizing to a received signal in an IR-UWB receiver including sampling the received signal in a frequency that is less than a Nyquist frequency of the received signal; for each part of the sampled received signal that is equal in length to a synchronization symbol: calculating a cross-correlation between the synchronization symbol and the part of the sampled received signal that is equal in length to the synchronization symbol; calculating at least one autocorrelation, where each autocorrelation is performed between the results of the cross-correlation and the results of the cross-correlation delayed by a time lag that equals one or more time-durations of the synchronization symbol; accumulating the results of each of the at least one autocorrelation to obtain at least one coarse synchronization window; and analyzing the at least one coarse synchronization window to detect presence of the synchronization symbol in the received signal.

公开(公告)号：US11996882B2

公开(公告)日：2024-05-28

申请号：US17992858

申请日：2022-11-22

申请人： UIF (University Industry Foundation), Yonsei University

发明人： Tae Wook Kim ,  Junyoung Jang

IPC分类号： H04B1/71 ,  H04B1/7163 ,  H04B1/7183

CPC分类号： H04B1/7183 ,  H04B1/71632

摘要： An impulse wireless communication system includes an oscillation signal generator that generates a plurality of oscillation signals having a delay interval with each other and having the same phase and amplitude or different phases and amplitudes, an envelope signal generator that extracts a sync signal and a data signal making up communication signal data and generates an envelope signal for the sync signal and an envelope signal for the data signal, a signal synthesizer that synthesizes the plurality of oscillation signals with the envelope signals, an envelope signal extractor that extracts a plurality of modulation envelope signals from the impulse signal, an amplitude phase determiner that determines the phase and the amplitude in the plurality of modulation envelope signals based on the plurality of oscillation signals, and a calculator that extracts the envelope signals from the plurality of modulation envelope signals based on the phase and the amplitude.

公开(公告)号：US20240171215A1

公开(公告)日：2024-05-23

申请号：US18057753

申请日：2022-11-21

申请人： QUALCOMM Incorporated

发明人： Varun Amar REDDY ,  Alexandros MANOLAKOS ,  Pooria PAKROOH ,  Krishna Kiran MUKKAVILLI

IPC分类号： H04B1/7183 ,  H04W12/037

CPC分类号： H04B1/7183 ,  H04W12/037

摘要： In some implementations, a first ultra-wideband (UWB) device may determine a respective time offset for each scrambled timestamp sequence (STS) in a series of STS used for ranging in a UWB ranging session between the first UWB device and the second UWB device, wherein the respective time offset for each STS in the series of STS is determined in accordance with time offset information shared between the first UWB device and the second UWB device. The first UWB device may transmit the series of STS via UWB radio frequency (RF) signals during the UWB ranging session, wherein each STS in the series of STS is transmitted with the respective time offset.

公开(公告)号：US20240040493A1

公开(公告)日：2024-02-01

申请号：US18484072

申请日：2023-10-10

申请人： ITRON, INC.

发明人： Fabrice MONIER ,  Jerome BARTIER ,  Yacine KHALED ,  Imad JAMIL ,  Khalid MAALLEM ,  Samuel DE VALS

IPC分类号： H04W48/00 ,  H04W48/10 ,  H04L5/00 ,  H04B1/7143 ,  H04W72/0446 ,  H04B1/7183

CPC分类号： H04W48/17 ,  H04W48/10 ,  H04L5/0005 ,  H04B1/7143 ,  H04W72/0446 ,  H04B1/7183

摘要： Various embodiments disclose techniques for time-multiplexing multiple listening schedules and physical layer modes that include a first node listening, using a first physical layer mode, for a first network discovery signal; in response to not detecting the first network discovery signal, listening, using a second physical layer mode, for a second network discovery signal; and in response to detecting the second network discovery signal transmitted by a second node using the second physical layer mode, establishing a connection with the second node using the second physical layer mode.

公开(公告)号：US20230239821A1

公开(公告)日：2023-07-27

申请号：US18127230

申请日：2023-03-28

申请人： KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO

发明人： Masateru FURUTA ,  Tadashi FUKAGAI ,  Yuki KONO ,  Yutaka KUBO

IPC分类号： H04W56/00 ,  H04B1/7183

CPC分类号： H04W56/0045 ,  H04B1/7183

摘要： A wireless communication device having a control section configured to control transmission and reception of a wireless signal by an antenna in conformity with a designated communication standard, wherein the control section controls a timing of causing the antenna to transmit a second signal in response to a first signal received by the antenna, on a basis of fixed time and delay time related to internal transfer in the wireless communication device, the fixed time being decided in advance.

公开(公告)号：US11637586B2

公开(公告)日：2023-04-25

申请号：US17556043

申请日：2021-12-20

申请人： Wiser Systems, Inc.

发明人： Seth Edward-Austin Hollar

IPC分类号： H04B1/71 ,  H04B1/7183

摘要： Some embodiments of the present inventive concept provide a system for maintaining clock synchronization including an ultra-wideband (UWB) transmitting system and a UWB receiving system. The high precision input clock at the transmitting system produces a high precision clock frequency. A message is sent from the transmitting system including a transmit time of the message in UWB transmitter clock units. The message is received at the UWB receiving system at an arrival time in UWB receiver clock units. A time of flight (ToF) and an oscillator offset is calculated based on the transmit time included in the message and the arrival time. A tuning register uses the calculated oscillator adjustment to adjust the low precision resonator to synchronize the low precision resonator with the high precision input clock at the UWB transmitting system.

公开(公告)号：US11575408B2

公开(公告)日：2023-02-07

申请号：US17137248

申请日：2020-12-29

申请人： HYUNDAI MOBIS Co., Ltd.

发明人： Jong Chul Lim

IPC分类号： H04B1/719 ,  H04B1/713 ,  H04W12/041 ,  H04B1/7183 ,  H04L9/08 ,  H04B1/69

摘要： Disclosed is an ultra-wideband (UWB) system and, more particularly, a UWB system using UWB ranging factor definition. The UWB system using the UWB ranging factor definition includes a memory in which a UWB ranging factor definition program is embedded and a processor which executes the program, wherein the program predefines UWB ranging factors to define a scrambled timestamp sequence (STS) index, an encryption key, and a nonce.

公开(公告)号：US20220329282A1

公开(公告)日：2022-10-13

申请号：US17843530

申请日：2022-06-17

申请人： TRANSFERT PLUS SOCIETE EN COMMANDITE

发明人： FREDERIC NABKI ,  DOMINIC DESLANDES ,  MOHAMMAD TAHERZADEH-SANI ,  MICHIEL SOER

IPC分类号： H04B1/717 ,  H04L7/00 ,  H04B1/16 ,  H04B1/3827 ,  H04L25/49 ,  H04L27/22 ,  H04L1/00 ,  H04L27/26 ,  H04L5/00 ,  H04B1/7163 ,  H04L25/00 ,  H04B1/7183 ,  H04L7/033 ,  H04L25/03

摘要： Ultra-Wideband (UWB) technology exploits modulated coded impulses over a wide frequency spectrum with very low power over a short distance for digital data transmission. Today's leading edge modulated sinusoidal wave wireless communication standards and systems achieve power efficiencies of 50 nJ/bit employing narrowband signaling schemes and traditional RF transceiver architectures. However, such designs severely limit the achievable energy efficiency, especially at lower data rates such as below 1 Mbps. Further, it is important that peak power consumption is supportable by common battery or energy harvesting technologies and long term power consumption neither leads to limited battery lifetimes or an inability for alternate energy sources to sustain them. Accordingly, it would be beneficial for next generation applications to exploit inventive transceiver structures and communication schemes in order to achieve the sub nJ per bit energy efficiencies required by next generation applications.

公开(公告)号：US11451262B1

公开(公告)日：2022-09-20

申请号：US17213105

申请日：2021-03-25

申请人： Credo Technology Group Limited

发明人： Yifei Dai ,  Haoli Qian

IPC分类号： H04B1/7183 ,  H04L7/033

摘要： An illustrative spread spectrum clocking (SSC) converter includes: a deserializer to receive a data stream with an unmodulated clock; a memory coupled to the deserializer to buffer the data stream; and a serializer coupled to the memory to retransmit the data stream with a spread spectrum clock. One illustrative conversion method, which may be implemented on a monolithic integrated circuit device, includes: receiving a data stream from an external transmitter in an unmodulated clock domain; storing the data stream in a buffer; and retransmitting the data stream with a spread spectrum clock. Such converters and methods may be employed in an illustrative system having: a test module to generate test data streams and to analyze result data streams for verifying operation of one or more devices under test in a spread spectrum clock domain as the test module operates in an unmodulated clock domain.