Chen Chen

Address:

2059 Wisper Wood Way, Windsor Mill, MD 21244

VIN:

1HGCM56197A039433

Make:

HONDA

Model:

ACCORD

Year:

2007

US Patent:

20190097865, Mar 28, 2019

Filed:

Nov 28, 2018

Appl. No.:

16/203299

Inventors:

- Greenbelt MD, US
Feng Zhang - Greenbelt MD, US
Chen Chen - Burlingame CA, US
Beibei Wang - Clarksville MD, US
Chenshu Wu - Greenbelt MD, US
Hangfang Zhang - Greenbelt MD, US
Chau-Wai Wong - Raleigh NC, US
David N. Claffey - Somerville MA, US
Chun-I Chen - Brookville MD, US
Hung-Quoc Duc Lai - Parkville MD, US
Min Wu - Clarksville MD, US
Yi Han - Ellicott City MD, US
Oscar Chi-Lim Au - San Jose CA, US
K. J. Ray Liu - Potomac MD, US

Assignee:

ORIGIN WIRELESS, INC. - Greenbelt MD

International Classification:

H04L 27/36
H04B 1/38
H04W 72/04

Abstract:

Apparatus, systems and methods for recognizing and classifying events in a venue based on a wireless signal are disclosed. In one example, a disclosed system comprises a first transmitter, a second transmitter, at least one first receiver, at least one second receiver, and an event recognition engine, in the venue. The first transmitter transmits a training wireless signal through a wireless multipath channel impacted by a known event in the venue in a training time period associated with the known event. Each first receiver receives asynchronously the training wireless signal, and obtains, asynchronously based on the training wireless signal, at least one time series of training channel information of the wireless multipath channel between the first receiver and the first transmitter. The second transmitter transmits a current wireless signal through the wireless multipath channel impacted by a current event in a current time period associated with the current event. Each second receiver receives asynchronously the current wireless signal, and obtains, asynchronously based on the current wireless signal, at least one time series of current channel information of the wireless multipath channel between the second receiver and the second transmitter. The event recognition engine trains a classifier based on the training channel information; and apples the classifier to: classify the current channel information and associate the current event with at least one of: a known event, an unknown event and another event.

US Patent:

20190020530, Jan 17, 2019

Filed:

Sep 9, 2018

Appl. No.:

16/125748

Inventors:

- Greenbelt MD, US
Masato MARUMO - Tokyo, JP
Beibei WANG - Clarksville MD, US
Hung-Quoc Duc LAI - Parkville MD, US
K. J. Ray LIU - Potomac MD, US
Chen CHEN - Burlingame CA, US
Qinyi XU - College Park MD, US
Yi HAN - Ellicott City MD, US
Feng ZHANG - Greenbelt MD, US
Zoltan SAFAR - Ellicott City MD, US

Assignee:

ORIGIN WIRELESS, INC. - Greenbelt MD

International Classification:

H04L 27/36
H04W 72/04
H04B 1/38

Abstract:

The present teaching relates to wireless Internet of Things. In one example, a time reversal client is disclosed. The time reversal client comprises a processor, a memory communicatively coupled with the processor, and a set of instructions, when executed by the processor based on the memory, that cause the time reversal client to perform the following steps: communicatively coupling with a time reversal server through a network, obtaining a set of channel state information (CSI), wherein the set of CSI is captured when at least one probing signal is sent from the wireless transmitter to the wireless receiver through a wireless multipath channel associated with a space, and causing the set of CSI to be sent to the time reversal server through the network.

US Patent:

20180365975, Dec 20, 2018

Filed:

Dec 9, 2016

Appl. No.:

16/060710

Inventors:

- Greenbelt MD, US
Feng Zhang - Greenbelt MD, US
Chen Chen - College Park MD, US
Beibei Wang - Clarksville MD, US
Zoltan Safar - Ellicott City MD, US
Yi Han - Ellicott City MD, US
Hung-Quoc Duc Lai - Parkville MD, US
K. J. Ray Liu - Potomac MD, US

International Classification:

G08B 29/18
G08B 13/181
H04B 7/06
G01S 13/00
G01S 13/56

Abstract:

An apparatus for detecting events includes a processor and a storage device storing instructions that when executed by the processor cause the processor to train a classifier for classifying channel state information (CSI) and detecting an event based on the classification of the CSI obtained during a monitoring phase. The training of the classifier includes: for each of the known events to be detected, during a time period in which the known event occurs in a venue, obtain training CSI of a wireless multipath channel between a wireless transmitter and a wireless receiver in the venue, in which the training CSI is derived from one or more probing signals sent from the transmitter through the wireless multipath channel to the receiver, and train the classifier based on the known events and the training CSI associated with each of the events.

US Patent:

20180183650, Jun 28, 2018

Filed:

Jan 17, 2018

Appl. No.:

15/873806

Inventors:

- Greenbelt MD, US
Hung-Quoc Duc LAI - Parkville MD, US
Chun-I CHEN - Brookeville MD, US
Chau-Wai WONG - Raleigh NC, US
Beibei WANG - Clarksville MD, US
Chen CHEN - College Park MD, US
Oscar Chi-Lim AU - San Jose CA, US
Yi HAN - Ellicott City MD, US
K. J. Ray LIU - Potomac MD, US

Assignee:

ORIGIN WIRELESS, INC. - Greenbelt MD

International Classification:

H04L 27/36
H04B 1/38
H04W 72/04

Abstract:

Method, apparatus and systems for object tracking are disclosed. In one example, a disclosed method includes obtaining at least one time series of channel information (CI) of a wireless multipath channel using: a processor, a memory communicatively coupled with the processor and a set of instructions stored in the memory. The at least one time series of channel information is extracted from a wireless signal transmitted between a Type 1 heterogeneous wireless device at a first position in a venue and a Type 2 heterogeneous wireless device at a second position in the venue through the wireless multipath channel. The wireless multipath channel is impacted by a current movement of an object in the venue. The method also includes determining a spatial-temporal information of the object based on at least one of: the at least one time series of channel information, a time parameter associated with the current movement, and a past spatial-temporal information of the object. The at least one time series of channel information is preprocessed. Associated computation may be shared among the processor, the Type 1 heterogeneous wireless device and the Type 2 heterogeneous wireless device.

US Patent:

20180131554, May 10, 2018

Filed:

Jan 3, 2018

Appl. No.:

15/861422

Inventors:

- Greenbelt MD, US
Hung-Quoc Duc LAI - Parkville MD, US
Beibei WANG - Clarksville MD, US
Chen CHEN - College Park MD, US
Oscar Chi-Lim AU - San Jose CA, US

Assignee:

ORIGIN WIRELESS, INC. - Greenbelt MD

International Classification:

H04L 27/36
H04W 72/04
H04B 1/38

Abstract:

The present teaching relates to collecting and processing location-specific wireless waveforms for use in wireless communication, components, methods, apparatuses, servers, and systems. In one embodiment, a disclosed system comprises a first wireless transceiver of a first device, and at least one second wireless transceiver of at least one second device. The first wireless transceiver of the first device is wirelessly coupled to the at least one second wireless transceiver through a wireless multipath channel associated with a space. The first device with the first wireless transceiver comprises a processor and a memory, which are configured to obtain a set of channel information (CI) and perform a task associated with the space based on the set of channel information. The set of channel information is captured when at least one probing signal is either (1) sent from the first wireless transceiver to a particular second wireless transceiver through the wireless multipath channel associated with the space, or (2) sent from the particular second wireless transceiver to the first wireless transceiver through the wireless multipath channel. The set of CI comprises a channel impulse response, a channel frequency response, a channel profile, and/or another channel data of the wireless multipath channel.

US Patent:

20170212210, Jul 27, 2017

Filed:

Jul 17, 2015

Appl. No.:

15/326112

Inventors:

- Boston MA, US
Hung-Quoc Duc LAI - Parkville MD, US
Yi HAN - Ellicott City MD, US
Chen CHEN - College Park MD, US

International Classification:

G01S 5/06
G01S 5/02

Abstract:

A time-reversal positioning system includes a storage storing first data representing channel impulse responses derived from probe signals sent from a plurality of positions and second data representing coordinates of the positions. A data processor determines a position of a terminal device based on the stored channel impulse responses and a time-reversed signal determined based on a time-reversed version of a channel impulse response that is estimated based on a channel probing signal sent from the terminal device.

US Patent:

20170188359, Jun 29, 2017

Filed:

Dec 19, 2016

Appl. No.:

15/384217

Inventors:

- Greenbelt MD, US
Hung-Quoc Duc Lai - Parkville MD, US
Beibei Wang - Clarksville MD, US
Qinyi Xu - Greenbelt MD, US
Chen Chen - College Park MD, US
Feng Zhang - Greenbelt MD, US
Yi Han - Greenbelt MD, US
Zoltan Safar - Ellicott City MD, US
Oscar Chi-Lim Au - San Jose MD, US

International Classification:

H04W 72/04
H04W 72/08

Abstract:

A time-reversal wireless system comprising a first wireless transceiver of a time-reversal client, one or more second wireless transceiver and/or a time-reversal client with the first wireless transceiver. The first wireless transceiver of the time-reversal client is wirelessly coupled to the one or more second wireless transceiver through a wireless broadband multipath channel associated with a space. The time-reversal client contains the first wireless transceiver. The time-reversal client also contains a processor and a memory configured to obtain a set of channel state information (CSI) in a channel probing phase, and/or to obtain a set of location-specific signatures based on the set of CSI and/or a time reversal operation in a channel probing phase. The set of CSI is captured when one or more probing signal is sent either from the first wireless transceiver to each of the at least one second wireless transceiver, or from each of the at least one second wireless transceiver to the first wireless transceiver, through the wireless broadband multipath channel associated with the space. A channel passband with bandwidth W0 is associated with the wireless broadband multipath channel. A first passband with bandwidth W1 is associated with the first wireless transceiver. The W1 is not larger than W0 such that the first passband is part of the channel passband. One or more second passband is associated with the one or more second wireless transceiver such that a bandwidth W2 associated with each of the one or more second passband is not larger than W1 such that the each of the one or more second passband is part of the first passband. Each of the set of CSI include a channel impulse response, a channel frequency response, and/or another channel state data of the wireless broadband multipath channel.