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21.发明申请SYSTEMS AND METHODS FOR SENSING ENVIRONMENTAL CHANGES USING LIGHT SOURCES AS SENSORS 有权使用光源作为传感器感测环境变化的系统和方法公开(公告)号：US20140375352A1
公开(公告)日：2014-12-25
申请号：US14345197
申请日：2012-09-14
Inventor： Shwetak N. Patel , Sidhant Gupta , Matthew S. Reynolds
CPC classification number: G01R29/0885 , G01R29/0814 , G01R31/001 , G01R31/086
Abstract: Systems and methods for sensing environmental changes using electromagnetic interference (EMI) signals are disclosed herein. An EMI monitoring system may be used to monitor an EMI signal of one or more light sources provided over a power line, e.g., in a home or building. The received EMI energy at the power line may be analyzed to detect variations in the EMI signature indicative of environmental changes occurring in the proximity of the light sources. Environmental changes that may be sensed include, but are not limited to, proximity, touch, motion, and temperature change.
Abstract translation: 本文公开了使用电磁干扰（EMI）信号来感测环境变化的系统和方法。 EMI监测系统可以用于监测在电力线上提供的一个或多个光源的EMI信号，例如在家庭或建筑物中。 可以分析在电力线处接收到的EMI能量，以检测指示在光源附近发生的环境变化的EMI标志的变化。 可能感测到的环境变化包括但不限于接近，触摸，运动和温度变化。
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22.发明申请公开(公告)号：US20220397664A1
公开(公告)日：2022-12-15
申请号：US17821151
申请日：2022-08-19
Applicant: University of Washington
Inventor： Andreas Pedross-Engel , Daniel Arnitz , Matthew S. Reynolds
Abstract: Examples of active millimeter-wave imaging systems are described which may utilize modulation schemes to provide illumination signals. The use of modulation techniques may allow for the use of direct-conversion receivers while retaining an ability to separate desired received signal from self-jamming and/or DC offset signal(s) generated by the direct-conversion receivers. In some examples, modulation schemes include the use of balanced orthogonal codes which may support MIMO or massive MIMO imaging systems.
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公开(公告)号：US11411597B2
公开(公告)日：2022-08-09
申请号：US16868420
申请日：2020-05-06
Applicant: University of Washington
Inventor： Matthew S. Reynolds , Joshua F. Ensworth
Abstract: Examples described herein include devices and methods that may facilitate interoperability between backscatter devices and wireless communication devices. For example, backscatter devices and methods for backscattering are described that provide a transmitted backscattered signal formatted in accordance with a wireless communication protocol (e.g. Bluetooth Low Energy, WiFi, IEEE 802.11, or IEEE 802.15.4). Such communication may reduce or eliminate any modifications required to wireless communication devices necessary to receive and decode backscattered signals.
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公开(公告)号：US20220224583A1
公开(公告)日：2022-07-14
申请号：US17576707
申请日：2022-01-14
Applicant: University of Washington
Inventor： James D. Rosenthal , Matthew S. Reynolds
Abstract: Examples of digital architectures for OFDM backscatter communication are described herein that use RF switches and discrete loads to implement digitally controlled single-sideband OFDM backscatter devices. One or more transforms may be implemented, including one or more IFFTs, LUTs, and/or numerically-controlled oscillators using one or more sine LUTs.
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25.发明授权公开(公告)号：US11133717B2
公开(公告)日：2021-09-28
申请号：US16651984
申请日：2018-09-28
Applicant: University of Washington
Inventor： Matthew S. Reynolds , Daniel Arnitz
Abstract: Examples described herein utilize a backscatter signal provided by a wirelessly powered device to estimate channel information, (e.g., a channel transfer function) between the wirelessly powered device and a transmitter system. The channel information may be used to optimize MIMO power transfer for linear as well as nonlinear backscatter devices. Examples of die method ‘may shift some or all of the power cost and complexity of coherent channel measurements from the WFD to the transmitters), and allow WPT optimization to milliwatt- or microwatt-class wirelessly powered devices.
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Patent Agency Ranking
公开(公告)号：US10461783B2
公开(公告)日：2019-10-29
申请号：US15923238
申请日：2018-03-16
Applicant: University of Washington
Inventor： Matthew S. Reynolds
Abstract: Backscatter communication offers the potential for significant energy savings compared to conventional wireless links such as Bluetooth, Zigbee, WiFi, etc. However, backscatter communication requires the presence of a carrier source in the environment at an appropriate frequency. If such a carrier source is not available in the environment, backscatter communication may not be practical. Examples are presented for a radio frequency communication device having the option to use either backscatter communication, or non-backscatter communication, with the re-use of at least portions of the hardware components between the backscatter and non-backscatter communication modes.
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27.发明申请公开(公告)号：US20180269909A1
公开(公告)日：2018-09-20
申请号：US15923238
申请日：2018-03-16
Applicant: University of Washington
Inventor： Matthew S. Reynolds
IPC: H04B1/04
CPC classification number: H04B1/04 , H04B1/406 , H04B5/00 , H04B5/0031 , H04W88/06
Abstract: Backscatter communication offers the potential for significant energy savings compared to conventional wireless links such as Bluetooth, Zigbee, WiFi, etc. However, backscatter communication requires the presence of a carrier source in the environment at an appropriate frequency. If such a carrier source is not available in the environment, backscatter communication may not be practical. Examples are presented for a radio frequency communication device having the option to use either backscatter communication, or non-backscatter communication, with the re-use of at least portions of the hardware components between the backscatter and non-backscatter communication modes.
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公开(公告)号：US20170131395A1
公开(公告)日：2017-05-11
申请号：US15319720
申请日：2015-06-25
Applicant: UNIVERSITY OF WASHINGTON
Inventor： Matthew S. Reynolds , Chen Zhao , Ke-Yu Chen , Shwetak N. Patel
CPC classification number: G01S13/56 , G01S7/415 , G01S13/003 , G06F3/017 , G06F3/046 , G06F2203/04101 , H01Q1/243 , H01Q21/00
Abstract: Examples described herein may detect gestures using multiple antennas and/or using reflected signals transmitted by the device which is also detecting the gesture. Multiple antenna detection may allow for classification of 3D gestures around a device. The use of reflected signals transmitted by the device itself may reduce a need for a separate signal source to be used for gesture detection. Accordingly, in some examples, devices (e.g. mobile phones) may detect gestures performed on or around the device without a need to transmit any signal specifically designed for gesture detection. Signals already transmitted by the device (e.g. GSM signals) may be used to detect the gestures.
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29.发明申请公开(公告)号：US20170126282A1
公开(公告)日：2017-05-04
申请号：US15343001
申请日：2016-11-03
Applicant: University of Washington
Inventor： Joshua Fromm , Shwetak N. Patel , Matthew S. Reynolds
CPC classification number: H04B5/0037 , H04B5/0043 , H04B13/005 , H04W4/80
Abstract: Example systems described herein may include one or more sensor devices that may be powered by a power device. The power may be transmitted from the power device to the sensor devices through a waveguide (e.g. a body). In some examples, the power device may be implemented using a near-field communication device (e.g. a mobile phone configured for near-field communication (NFC)). Magnetic fields generated by near-field communication devices may be transduced into electric fields and applied to a waveguide (e.g. a body) for transmission to the sensor devices. The sensor devices may harvest power from the signals received from the waveguide (e.g. the body).
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30.发明授权公开(公告)号：US09240823B2
公开(公告)日：2016-01-19
申请号：US14747963
申请日：2015-06-23
Inventor： Shwetak N. Patel , Gabriel A. Cohn , Matthew S. Reynolds
CPC classification number: H04B3/542 , G08B25/06 , G08B29/02 , H04B2203/5408 , H04B2203/5441 , H04B2203/5445 , H04L27/14 , H04W24/08
Abstract: Apparatuses, receivers, systems and methods for receiving data via a power line infrastructure. An exemplary apparatus includes a base station configured to receive a signal from a power line of a structure by coupling to the power line through an electrical outlet. The base station may include an impedance matching circuit configured to match an impedance of the power line of the structure, and a receiver coupled to the impedance matching circuit. The receiver may be configured to demodulate the signal received from the power line of the structure, convert the demodulated signal into a digital signal, and provide the digital signal to a decoder.
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