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公开(公告)号：US12025729B2
公开(公告)日：2024-07-02
申请号：US17527796
申请日：2021-11-16
申请人： Imec vzw
发明人： Marc Bauduin , Andre Bourdoux
CPC分类号： G01S7/354 , G01S7/358 , G01S13/325 , G01S13/58
摘要： A method is provided for facilitating radar detection robust to IQ imbalance. The method comprises the step of generating a radar signal in digital domain comprising a number of M periodic repetitions of a code sequence with a length Lc, multiplied with a progressive phase rotation
e
j
·
π
K
·
n
,
where Lc and M are integers, K is an integer or a non-integer, and n is a discrete integer variable. The method further comprises the step of generating a process input signal in digital domain from a reflection signal corresponding to the radar signal by multiplying the reflection signal with a progressive phase rotation
e
-
j
·
π
K
·
n
.
In this context, K is defined such that a ratio
Lc
K
is a non-integer, and M is defined such that a ratio
Lc
·
M
K
is an integer.-
公开(公告)号：US20240201324A1
公开(公告)日：2024-06-20
申请号：US18588553
申请日：2024-02-27
发明人： Dajie JIANG , Jian YAO , Jianzhi LI , Hao LIU , Shengli DING , Fei QIN
CPC分类号： G01S7/356 , G01S7/006 , G01S7/358 , G01S13/825 , G01S13/878 , H04B17/30
摘要： This application discloses a detection method and apparatus, and a device. The detection method includes: detecting, by a second device, a sensing signal sent by a first device, to obtain a measurement value corresponding to a measurement quantity of the sensing signal, where the measurement quantity includes at least one of the following: a first measurement quantity, a second measurement quantity, or a third measurement quantity.
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公开(公告)号：US20240175977A1
公开(公告)日：2024-05-30
申请号：US18434704
申请日：2024-02-06
IPC分类号： G01S7/03 , G01S7/35 , G01S13/931
CPC分类号： G01S7/03 , G01S7/352 , G01S7/358 , G01S13/931
摘要： A device, e.g., a radar transceiver, includes a receiver and a transmitter. One such device includes a phase shifter having a first input to receive an oscillating signal and a second input to receive a control signal. The device also includes a signal generator having a quadrature (Q) channel output to output a quadrature phase version of the oscillating signal; and a Q channel mixer having an input coupled to the Q channel output. A feedback path of the device includes a filter having an output and an input coupled to an output of the Q channel mixer, and an integrator having an input coupled to the output of the filter. The integrator has an output coupled to the second input of the phase shifter, in which the integrator outputs the control signal to the phase shifter.
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公开(公告)号：US11747458B2
公开(公告)日：2023-09-05
申请号：US17197132
申请日：2021-03-10
发明人： Fu-Kang Wang , Pin-Hsun Juan , Chao-Kai Wen , De-Ming Chian
CPC分类号： G01S13/341 , G01S7/358
摘要： A FCFMSIL radar includes a SILO, a frequency conversion unit, an antenna unit, a demodulation unit and a processing unit. The frequency conversion unit converts an oscillation signal of the SILO into a FMCW signal. The antenna unit transmits the FMCW signal to an area as a transmitted signal and receives a reflected signal from the area as a received signal. The frequency conversion unit converts the received signal into an injection signal and injects it into the SILO. The demodulation unit demodulates the oscillation signal into an in-phase demodulated signal and a quadrature demodulated signal. The processing unit processes the in-phase and the quadrature demodulated signals to obtain a baseband signal and thus acquire a phase and a frequency of a tone in the frequency-domain baseband signal, and determines the tone corresponding to one or multiple objects based on the phase and frequency of the tone.
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公开(公告)号：US11717189B2
公开(公告)日：2023-08-08
申请号：US16224922
申请日：2018-12-19
申请人： TransRobotics, Inc.
发明人： Sayf Al-Alusi
IPC分类号： A61B5/00 , A61B5/11 , A61B5/0507 , G01S7/41 , G01S13/32 , G01S13/50 , G01S13/87 , G01S13/88 , A61B5/024 , A61B5/113 , A61B5/1455 , G01S7/35 , A61B5/0205 , A61B5/05 , A61B5/08
CPC分类号： A61B5/1128 , A61B5/0035 , A61B5/0507 , A61B5/11 , A61B5/1112 , A61B5/1114 , A61B5/1117 , A61B5/1118 , A61B5/7246 , A61B5/7278 , G01S7/415 , G01S13/325 , G01S13/50 , G01S13/87 , G01S13/88 , A61B5/024 , A61B5/0205 , A61B5/02416 , A61B5/05 , A61B5/0816 , A61B5/113 , A61B5/1135 , A61B5/14551 , A61B5/14552 , A61B2562/0233 , A61B2576/00 , G01S7/358
摘要： A sensing system includes a first radar sensing assembly and an analysis system. The first radar sensing assembly measures plural distances to a first target location at different times using radar. The analysis system receives the plural distances from the first radar sensing assembly and quantifies movements of a target object at the first target location at the different times by calculating differences in the plural distances measured by the first radar sensing assembly. The analysis system generates one or more first quantified activity level values indicative of the movements of the target object at the first target location using the differences in the plural distances that are calculated.
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公开(公告)号：US11662427B2
公开(公告)日：2023-05-30
申请号：US16707224
申请日：2019-12-09
申请人： NXP USA, Inc.
发明人： Ryan Haoyun Wu , Douglas Alan Garrity , Maik Brett
摘要： A radar system, apparatus, architecture, and method are provided for generating a transmit reference or chirp signal to produce a plurality of transmit signals having different frequency offsets from the transmit reference signal for encoding and transmission as N radio frequency encoded transmit signals which are reflected from a target and received at a receive antenna as a target return signal that is down-converted to an intermediate frequency signal and converted by a high-speed analog-to-digital converter to a digital signal that is processed by a radar control processing unit which performs fast time processing steps to generate a range spectrum comprising N segments which correspond, respectively, to the N radio frequency encoded transmit signals transmitted over the N transmit antennas.
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公开(公告)号：US20240189167A1
公开(公告)日：2024-06-13
申请号：US18583257
申请日：2024-02-21
发明人： Frank E. Sauser , Steven D. Baker
IPC分类号： A61G7/057 , A47C27/08 , A61B5/00 , A61B5/024 , A61B5/0507 , A61B5/08 , G01B7/02 , G01S7/03 , G01S7/35 , G01S13/02 , G01S13/58 , G01S13/88 , H01Q1/22 , H01Q9/27
CPC分类号： A61G7/05769 , A47C27/083 , A61B5/0507 , A61B5/6894 , G01S7/032 , G01S13/582 , H01Q1/2216 , H01Q9/27 , A61B5/024 , A61B5/0816 , A61B5/447 , A61B5/6892 , A61G2203/20 , A61G2203/34 , A61G2203/40 , A61G2203/44 , G01B7/023 , G01S7/358 , G01S2013/0245 , G01S13/88
摘要： A patient immersion sensor includes a radio detection and ranging (RADAR) apparatus to determine a time of flight (TOF) of a RADAR pulse and a reflected signal that is reflected by a patient or by a portion of a patient support surface supporting the patient. The TOF is indicative of an immersion depth or a distance toward bottoming out of a patient supported on the patient support surface, such as a mattress or a pad. The RADAR apparatus emits pulses of very short duration so as to be able to detect objects, such as a patient or a portion of a mattress or pad, at very close distances. The RADAR apparatus may use time-of-flight (TOF) between transmission of the pulse and receipt of a reflected signal to determine a distance toward bottoming out by the patient, thereby to determine if the patient is properly immersed into the patient support surface. Adjustments to inflation or deflation of one or more bladders are made to achieve a desired immersion amount within a tolerance range between upper and lower TOF thresholds.
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公开(公告)号：US11947031B2
公开(公告)日：2024-04-02
申请号：US16680647
申请日：2019-11-12
IPC分类号： G01S7/03 , G01S7/35 , G01S13/931
CPC分类号： G01S7/03 , G01S7/352 , G01S7/358 , G01S13/931
摘要： A radar transceiver includes a receiver. The receiver includes a low noise amplifier a mixer, a baseband filter, an integrator, and a phase shifter. The mixer includes an input coupled to an output of the low noise amplifier. The baseband filter includes an input coupled to an output of the mixer. The integrator includes an input coupled to an output of the baseband filter. The phase shifter includes a control input and an output. The control input is coupled to an output of the integrator.
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公开(公告)号：US11822001B2
公开(公告)日：2023-11-21
申请号：US17244844
申请日：2021-04-29
CPC分类号： G01S7/006 , G01S7/35 , G01S7/354 , G01S13/325 , G01S13/343 , G01S13/48 , G01S13/931 , G01S7/358 , G01S7/4091 , G01S7/4095 , G01S13/865 , G01S2013/9316
摘要： In one embodiment, a method includes providing instructions to broadcast a modulated radar chirp signal from a radar antenna of a vehicle. The modulated radar chirp signal includes data associated with the vehicle. The method includes receiving a first return signal whose waveform substantially matches the modulated chirp signal. The first return signal is the modulated radar chirp signal after reflecting off of an object in an environment surrounding the vehicle. The method includes calculating a location for the object using the first return signal, receiving, from a base station antenna, a second return signal that indicates the modulated chirp signal was received by the base station antenna, and providing instructions to establish a wireless communication session with the base station antenna.
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公开(公告)号：US11815621B2
公开(公告)日：2023-11-14
申请号：US17368319
申请日：2021-07-06
IPC分类号： G01S7/35 , G01S7/40 , G01S13/931
CPC分类号： G01S7/352 , G01S7/4021 , G01S13/931 , G01S7/358 , G01S7/406
摘要： A radar system is provided that includes a receive channel configured to receive a reflected signal and to generate a first digital intermediate frequency (IF) signal based on the reflected signal, a reference receive channel configured to receive a reflected signal and to generate a second digital IF signal based on the reflected signal, and digital mismatch compensation circuitry coupled to receive the first digital IF signal and the second digital IF signal, the digital mismatch compensation circuitry configured to process the first digital IF signal and the second digital IF signal to compensate for mismatches between the receive channel and the reference receive channel.
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