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公开(公告)号：US11438135B2
公开(公告)日：2022-09-06
申请号：US16474257
申请日：2018-01-15
IPC分类号： H04L9/00 , G16H30/20 , H04L27/00 , H04L27/36 , G01R33/54 , H04L1/00 , H04L9/14 , H04L9/30 , H04L67/12 , H04W12/041 , H04W12/0431
摘要： A method for communicating magnetic resonance imaging (MRI) information wirelessly includes detecting an MRI system emission sequence, and identifying at least one parameter of the sequence. The at least one parameter identified is cross-correlated. A first initial condition for a first chaotic coded sequence and a second initial condition for a second chaotic coded sequence are determined based on the at least one parameter. The method further includes obtaining, from a modulation symbol mapped to MRI information generated at a local coil responsive to the sequence, a real component of the symbol and an imaginary component of the symbol. The real component of the symbol is encrypted based on the first initial condition, and the imaginary component of the symbol is encrypted based on the second initial condition. The encrypted real component and imaginary component of the symbol are wirelessly transmitted.
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公开(公告)号：US11277808B2
公开(公告)日：2022-03-15
申请号：US16960329
申请日：2019-01-08
IPC分类号： H04W56/00
摘要： A base station operating with a system clock includes a transmitter, a receiver, a phase error detector and a controller. The transmitter sends a first RF signal modulated onto a first RF carrier having a first phase over a first channel having a first variable phase delay to a mobile station. The mobile station recovers the first RF carrier, generates a second RF carrier, and synchronizes a local clock using the recovered first RF carrier and/or the second RF carrier. The receiver receives a second RF signal modulated onto the second RF carrier having a second phase over a second channel having a second variable phase delay. The phase error detector determines a phase error signal based on the first and second phases, and the controller generates a control signal based on the phase error signal. The control signal is applied to first and second inverse channel models.
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公开(公告)号：US11119167B2
公开(公告)日：2021-09-14
申请号：US16760506
申请日：2018-10-24
IPC分类号： G01R33/36
摘要： A magnetic resonance imaging system (100, 200, 300, 400) includes a wireless communication station (600) which: receives via a receive antenna element (630) at least one first clock signal among two or more first clock signals which are synchronized with a first clock (510); transmits two or more second clock signals from two or more transmit antenna elements (620-1) of a phased array antenna (620); transmits data representing a sensed magnetic resonance signal from at least two of the transmit antenna elements; outputs a clock synchronization signal in response to the received first clock signal(s); and synchronizes a second clock (610) to the first clock signal in response to the clock synchronization signal. The first clock signals are transmitted by a phased array antenna (520) of another wireless communication station (500). Phase and signal diversity transmission allows the first and second wireless communication stations to maintain clock synchronization in case of a loss of a line of sight path between the stations.
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公开(公告)号：US11454685B2
公开(公告)日：2022-09-27
申请号：US16766050
申请日：2018-11-27
摘要： A wireless magnetic resonance (MR) signal receiving system comprises a wireless MR coil (20) and a base station (50). The wireless MR coil includes coil elements (22) tuned to receive an MR signal, and electronic modules (24) each including a transceiver (30) and a digital processor (32). Each electronic module is operatively connected to receive an MR signal from at least one coil element. The base station includes a base station transceiver (52) configured to wirelessly communicate with the transceivers of the electronic modules of the wireless MR coil, and a base station digital processor (54). The electronic modules form a configurable mesh network (60) to wirelessly transmit the MR signals received by the electronic modules to the base station. The base station digital processor is programmed to operate the base station transceiver to receive the MR signals wirelessly transmitted to the base station by the configurable mesh network.
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公开(公告)号：US11320501B2
公开(公告)日：2022-05-03
申请号：US16969215
申请日：2019-01-30
摘要： A clocked electronic device, such as a wireless magnetic resonance (MR) receive coil (20), comprises a wireless receiver or transceiver (30) configured to receive a propagation-delayed wireless clock synchronization signal (54) comprising first and second propagation-delayed carrier signals at respective first and second carrier frequencies separated by a frequency difference, a clock (60) comprising a local oscillator (62) driving a digital counter (64), and at least one electronic signal processing component (66) configured to perform clock synchronization. This includes determining a wrap count (k) from a phase difference (φ1) between phases of the first and second propagation-delayed carrier signals, unwrapping a wrapped phase (φ2,wrapped) of the propagation-delayed wireless clock synchronization signal using the wrap count to generate an unwrapped phase (φ2,wrapped), and synchronizing the clock using the unwrapped phase.
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