Method, apparatus, server, and systems of time-reversal technology

Patent metadata

Field	Value
Publication number	US-11025475-B2
Application number	US-201815861422-A
Country	US
Kind code	B2
Filing date	Jan 3, 2018
Priority date	Dec 5, 2012
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

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.

First claim

What is claimed is:

1. A system, comprising:
a first wireless transceiver of a first device wirelessly coupled to at least one second. wireless transceiver through a wireless multipath channel associated with a space; and
the at least one second wireless transceiver of at least one second device,
wherein the first device comprises a processor and a memory configured to:
obtain a set of channel information (CI) captured when at least one probing signal is at least one of:
sent from the first wireless transceiver to a particular second wireless transceiver through the wireless multipath channel associated with the space, and
sent from the particular second wireless transceiver to the first wireless transceiver through the wireless multipath channel,
wherein the set of CI comprises at least one of: a channel impulse response, a channel frequency response, a channel profile, and another channel data of the wireless multipath channel,

perform a task associated with an object in the space based on the set of CI and a reference parameter associated with a state, and
update the reference parameter based on a threshold and a similarity score of the set of CI collected in the state,
wherein the task comprises determining a characteristics of the object, the characteristics being at least one of:
a frequency of a pseudo-periodic motion of the object, a frequency characteristics, a frequency spectrum, a time period of the pseudo periodic motion, a temporal characteristics, a temporal profile, a timing of the pseudo-periodic motion,
a motion type of a motion of the object, a motion classification, a starting time, an ending time, a duration, a history of motion,
a location of the object, a speed, a displacement, an acceleration, a rotational speed, a rotational characteristics, a gait cycle of the object,
a transient behavior of the object, a transient motion, a change in pseudo-periodic motion, a change in frequency of pseudo-periodic motion, a change in gait cycle,
an event associated with the pseudo-periodic motion, an event associated with the transient motion, a sudden-motion event, or a fall-down event associated with the object.

2. The system of claim 1 :
wherein at least one of: the set of CI and a quantity computed based on the set of CI, is being stored.

3. The system of claim 1 :
wherein at least one of: the set of CI and a quantity computed based on the set of CI, is being stored in a storage device communicatively coupled with the first device.

4. The system of claim 1 :
wherein at least one of: the set of CI and a quantity computed based on the set of CI, is being stored in a cloud storage device.

5. The system of claim 1 :
wherein the set of CI is being pre-processed.

6. The system of claim 1 :
wherein the set of CI is being pre-processed in a frequency domain.

7. The system of claim 1 :
wherein the set of CI is being pre-processed in a time domain.

8. The system of claim 1 :
wherein the set of CI is being pre-processed in a time-frequency domain.

9. The system of claim 1 :
wherein the phase of the set of CI is being cleaned.

10. The system of claim 1 :
wherein the phase of the set of CI is being cleaned in a frequency domain.

11. The system of claim 1 :
wherein a particular CI is being normalized.

12. The system of claim 1 :
wherein a particular CI is being normalized in the frequency domain.

13. The system of claim 1 :
wherein the set of CI is being transmitted to another device.

14. The system of claim 1 :
wherein the set of CI is being transmitted to another device through a network.

15. The system of claim 1 :
wherein the set of CI is being transmitted to a server in the cloud.

16. The system of claim 1 :
wherein the set of CI is being transmitted to a local server.

17. The system of claim 1 :
wherein the set of CI is being transmitted to a fog server communicatively coupled with a cloud server.

18. A method of a system, comprising:
obtaining a set of channel information (CI) using a processor and a memory of a first device of the system,
wherein a first wireless transceiver of the first device is wirelessly coupled to at least one second wireless transceiver of at least one second device of the system through a wireless multipath channel associated with a space,
wherein the set of CI is captured when at least one probing signal is at least one of:
sent from the first wireless transceiver to a particular second wireless transceiver through the wireless multipath channel associated with the space, and
sent from the particular second wireless transceiver to the first wireless transceiver through the wireless multipath channel;

performing a task associated with an object in the space based on the set of CI and a reference parameter associated with a state; and
updating the reference parameter based on a threshold and a similarity score of the set of CI collected in the state, wherein the task comprises determining a characteristics of the object, the characteristics being at least one of:
a frequency of a pseudo-periodic motion of the object, a frequency characteristics, a frequency spectrum, a time period of the pseudo periodic motion, a temporal characteristics. a temporal profile, a timing of the pseudo-periodic motion,
a motion type of a motion of the object, a motion classification, a starting time an ending time, a duration, a history of motion,
a location of the object, a speed, a displacement, an acceleration, a rotational speed, a rotational characteristics, a gait cycle of the object,
a transient behavior of the object, a transient motion, a change in pseudo-periodic motion, a change in frequency of pseudo-periodic motion, a change in gait cycle, an event associated with the pseudo-periodic motion, an event associated with the transient motion, a sudden-motion event, or a fall-down event associated with the object.

19. The method of claim 18 :
wherein the set of CI to comprise at least one of: a channel impulse response, a channel frequency response, a channel profile, and another channel data of the wireless multipath channel.

20. A first device of a system, comprising:
a first wireless transceiver wirelessly coupled to at least one second wireless transceiver of at least one second device of the system through a wireless multipath channel associated with a space;
a processor;
a memory communicatively coupled with the processor;
a set of instructions stored in the memory which, when executed by the processor, cause the first device to:
obtain a set of channel information) captured when at least one probing signal is at least one of:
sent from the first wireless transceiver to a particular second wireless transceiver through the wireless multipath channel associated with the space, and
sent from the particular second wireless transceiver to the first wireless transceiver through the wireless multipath channel,
wherein the set of CI comprises at least one of: a channel impulse response, a channel frequency response, a channel profile, or another channel data of the wireless multipath channel,

perform a task associated with an object in the space based on the set of CI and a reference parameter associated with a state, and
update the reference parameter based on a threshold and a similarity score of the set of CI collected in the state, wherein the task comprises determining a characteristics of the object, the characteristics being at least one of:
a frequency of a pseudo-periodic motion of the object,

Assignees

• Liu K J Ray
• Lai Hung Quoc Duc
• Wang Beibei
• Chen Chen
• Au Oscar Chi Lim
• Origin Wireless Inc

Inventors

• Liu K J Ray
• Lai Hung-Quoc Duc
• Wang Beibei
• Chen Chen
• Au Oscar Chi-Lim

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04B1/38 Primary

  Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving · CPC title

• H04L27/34

  Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems · CPC title

• H04L27/362 Primary

  Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated (H04L27/366 takes precedence) · CPC title

• H04W72/0413

  Electricity · mapped topic