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公开(公告)号：US11128342B2
公开(公告)日：2021-09-21
申请号：US16780004
申请日：2020-02-03
申请人： DecaWave, Ltd.
IPC分类号： H04B1/00 , H04B1/7163 , G01S5/02 , G01S5/06
摘要： An ultra-wideband (“UWB”) communication system comprising a transmitter having two transmit antennas and a receiver having a single receive antenna. Respective selected portions of the UWB signal are transmitted by the transmitter via each of transmit antennas is received at the receive antenna. By comparing the phases of the received signal portions, the phase difference of departure can be determined. From this phase difference and the known distance, d, between the transmit antennas, the Cartesian (x, y) location of the transmitter relative to the receiver can be directly determined.
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公开(公告)号：US20180331718A1
公开(公告)日：2018-11-15
申请号：US15814711
申请日：2017-11-16
申请人： DecaWave, Ltd
IPC分类号： H04B1/7163 , G01S3/48 , G01S3/02 , G01S3/46
CPC分类号： H04B1/71637 , G01S3/023 , G01S3/46 , G01S3/48
摘要： In an ultra-wideband (“UWB”) receiver, a received UWB signal is periodically digitized as a series of ternary samples. During a carrier acquisition mode, the samples are continuously correlated with a predetermined preamble sequence to develop a correlation value. When the value exceeds a predetermined threshold, indicating that the preamble sequence is being received, estimates of the channel impulse response (“CIR”) are developed. When a start-of-frame delimiter (“SFD”) is detected, the best CIR estimate is provided to a channel matched filter (“CMF”). During a data recovery mode, the CMF filters channel-injected noise from the sample stream. Both carrier phase errors and data timing errors are continuously detected and corrected during both the carrier acquisition and data recovery modes of operation.
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公开(公告)号：US11936420B2
公开(公告)日：2024-03-19
申请号：US17590582
申请日：2022-02-01
申请人： DECAWAVE, LTD.
发明人： Michael McLaughlin
CPC分类号： H04B1/7174 , H03M13/41 , H04B1/38
摘要： An ultra-wideband (“UWB”) communication system comprising a transmitter and a receiver. In one embodiment, the symbol mapper circuit in the transmitter is adapted, in a first mode, to develop symbols having the number of pulses as currently defined in the 4z Standard; and, in a second mode, to develop symbols having fewer pulses than as currently defined in the 4z Standard. In an optional third mode, each data bit is mapped to a single pulse.
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公开(公告)号：US11681034B2
公开(公告)日：2023-06-20
申请号：US16761160
申请日：2018-12-07
申请人： DecaWave, Ltd.
IPC分类号： G01S13/76 , H04B1/7163 , H04W12/037 , B60R25/20 , B60R25/24 , G05D1/00 , B60W30/06
CPC分类号： G01S13/765 , H04B1/7163 , H04W12/037 , B60R25/2072 , B60R25/24 , B60R2325/108 , B60W30/06 , G05D1/0022 , G05D2201/0213 , H04B2201/71634
摘要： A method of transmitting signals from a first node having multiple transceivers to a second node is disclosed. The method comprises receiving a message from the second node at the first node, wherein the message is received by each of a plurality of transceivers of the first node; and transmitting by each of the plurality of transceivers a respective data frame to the second node in response to the message; wherein each transceiver initiates the transmission of its respective data frame a predetermined time period after receipt of the message by the transceiver; and wherein the transmissions of the data frames from the plurality of transceivers overlap. The data frames may form part of a two-way ranging exchange.
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公开(公告)号：US11422220B2
公开(公告)日：2022-08-23
申请号：US16903500
申请日：2020-06-17
申请人： DecaWave, Ltd.
摘要： An ultra-wideband (“UWB”) communication system comprising a transmitter having two transmit antennas and a receiver having a single receive antenna. Respective selected portions of the UWB signal are transmitted by the transmitter via each of transmit antennas is received at the receive antenna. By comparing the phases of the received signal portions, the phase difference of departure can be determined. From this phase difference and the known distance, d, between the transmit antennas, the Cartesian (x,y) location of the transmitter relative to the receiver can be directly determined.
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公开(公告)号：USRE48832E1
公开(公告)日：2021-11-23
申请号：US16437695
申请日：2019-06-11
申请人： DECAWAVE LTD.
发明人： Gavin Marrow , Michael McLaughlin , Ciaran McElroy
IPC分类号： H04B1/7163 , G01S3/02 , G01S3/46 , G01S3/48
摘要： In an ultra-wideband (“UWB”) receiver, a received UWB signal is periodically digitized as a series of ternary samples. During a carrier acquisition mode of operation, the samples are continuously correlated with a predetermined preamble sequence to develop a correlation value. When the value exceeds a predetermined threshold, indicating that the preamble sequence is being received, estimates of the channel impulse response (“CIR”) are developed. When a start-of-frame delimiter (“SFD”) is detected, the best CIR estimate is provided to a channel matched filter (“CMF”). During a data recovery mode of operation, the CMF filters channel-injected noise from the sample stream. Both carrier phase errors and data timing errors are continuously detected and corrected during both the carrier acquisition and data recovery modes of operation. The phase of the carrier can be determined by accumulating the correlator output before it is rotated by the carrier correction. By comparing the carrier phases of two receivers separated by a known distance, d, the angle of incidence, θ, of the signal can be determined.
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公开(公告)号：US20200259523A1
公开(公告)日：2020-08-13
申请号：US16789180
申请日：2020-02-12
申请人： DecaWave, Ltd.
发明人： Michael McLaughlin
摘要： An ultra-wideband (“UWB”) communication system comprising a transmitter and a receiver. In one embodiment, the symbol mapper circuit in the transmitter is adapted, in a first mode, to develop symbols having the number of pulses as currently defined in the 4z Standard; and, in a second mode, to develop symbols having fewer pulses than as currently defined in the 4z Standard. In an optional third mode, each data bit is mapped to a single pulse.
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公开(公告)号：US20200045661A1
公开(公告)日：2020-02-06
申请号：US16492536
申请日：2018-03-09
申请人： Decawave, Ltd.
发明人： Billy Verso , Michael McLaughlin
摘要： A method of synchronizing signals is disclosed. The method comprises using a clock tracking system to convert a future event target time specified in a time base of a master device into the local unsynchronized time bases of one or more slave devices. Each of the slave devices then generates an event signal at the converted time, such that a coordinated delivery of synchronized signals is achieved.
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公开(公告)号：US10177752B2
公开(公告)日：2019-01-08
申请号：US14983027
申请日：2015-12-29
申请人： DecaWave Ltd.
IPC分类号： H03K5/26 , H03L7/07 , H03L7/18 , H04B1/7183
摘要： In a receiver facility in an ultra-wideband communication system, a dual-mode circuit adapted to operate in a selected one of three operating modes without changes in circuit topology: a calibration mode adapted to render the circuit substantially independent of circuit component mismatches; a frequency comparator mode adapted to indicate whether the frequency of a first periodic signal is larger or smaller than the frequency of a second periodic signal; and an early-late detector mode adapted to indicate whether the 1st rising edge of the first periodic signal arrived sooner or later than the 1st rising edge of the second periodic signal applied.
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公开(公告)号：US20240223237A1
公开(公告)日：2024-07-04
申请号：US18434089
申请日：2024-02-06
申请人： DECAWAVE, LTD.
发明人： Michael McLaughlin
CPC分类号： H04B1/7174 , H03M13/41 , H04B1/38
摘要： An ultra-wideband (UWB) communication system comprising a transmitter and a receiver is disclosed. In one embodiment, a symbol mapper circuit in the transmitter is adapted, in a first mode, to develop symbols having the number of pulses as currently defined in the 4z Standard; and, in a second mode, to develop symbols having fewer pulses than as currently defined in the 4z Standard. In an optional third mode, each data bit is mapped to a single pulse.
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