Motion detector device

Patent metadata

Field	Value
Publication number	US-9869759-B2
Application number	US-201114352967-A
Country	US
Kind code	B2
Filing date	Oct 19, 2011
Priority date	Oct 19, 2011
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

The present invention relates to a motion detector device comprising a receiver arranged for reception of at least one electromagnetic signal constituted by a corresponding transmitted electromagnetic signal being transmitted by a corresponding source and influenced by a corresponding channel. The motion detector device comprises predetermined information regarding each transmitted electromagnetic signal. The motion detector device further comprises analyzing means arranged to analyze all components of the received signal to determine how certain parameters of each transmitted electromagnetic signal are influenced by each corresponding channel by means of the predetermined information. The analyzing means is also arranged to analyze the temporal variation of said certain parameters during a certain time. It is determined if said temporal variation exceeds a predetermined threshold.
The present invention also relates to a corresponding method.

First claim

The invention claimed is:

1. A motion detector device comprising:
a receiver operable to: (1) receive via a first channel region a first reference signal transmitted by a first transmission point and (2) receive via a second channel region a second reference signal transmitted by a second transmission point located remotely from the first transmission point, wherein the first channel region includes a region portion that is not included in the second channel region;
an analyzer configured to:
analyze the received first reference signal to determine how first certain parameters of the first signal are influenced by the first channel region,
analyze the received second reference signal to determine how second certain parameters of the second signal are influenced by the second channel region,
analyze temporal variation of said first certain parameters during a certain time, wherein the temporal variation of said first certain parameters differs based on a movement of the motion detector device and a movement of objects surrounding the motion detector device,
analyze temporal variation of said second certain parameters during the certain time, wherein the temporal variation of said second certain parameters differs based on a movement of the motion detector device and a movement of objects surrounding the motion detector device,
determine, based on the analysis of the temporal variations of said first and second certain parameters, whether an object is located in the region portion of the first channel region that is not included in the second channel region, and
determine, based on the analysis of the temporal variations of said first and second certain parameters, whether the motion detector device has moved within the certain time.

2. The motion detector device according to claim 1 , wherein the motion detector device is configured to detect one or more of motion of surrounding objects and if the motion detector device itself is moved.

3. The motion detector device according to claim 1 , wherein the receiver is configured to receive at least two electromagnetic signals which have been transmitted by at least two spatially separated sources.

4. The motion detector device according to claim 3 , wherein the analyzer is configured detect presence of an object and detect that the distance between the object and the receiver is: i) less than the distance between the object and the first transmission point and ii) less than the distance between the object and the second transmission point.

5. The motion detector device according to claim 1 , wherein the receiver is configured to receive information from each source regarding received signal characteristics for at least one user terminal, wherein the user terminal is spatially separated from the motion detector device; and
the analyzer is configured to correlate the information with all received electromagnetic signals in order to distinguish between surrounding objects closer to the motion detector device than said source, and surrounding objects closer to said source than the motion detector device.

6. The motion detector device according to claim 1 , wherein the analyzer is arranged to form an average channel response for a number of channel responses during a certain time, where the analysis of temporal variation of said certain parameters during a certain time comprises analysis of variations around the average channel response.

7. The motion detector device according to claim 6 , wherein the variations around the average channel response comprise variation of the amplitude of peaks and fades in the instantaneous channel responses, which variation is comprised in said temporal variations.

8. The motion detector device according to claim 6 , wherein the variations around the average channel response comprise variation of the location of peaks and fades in the instantaneous channel responses, which variation is comprised in said temporal variations.

9. The motion detector device according to claim 1 , wherein each source is in the form of a wireless communication source.

10. The motion detector device according to claim 1 , wherein the analysis of temporal variation of said certain parameters during a certain time comprises analysis of Doppler shifts.

11. A method for detection of motion, the method comprising:
receiving via a first channel region a first reference signal transmitted by a first transmission point;
receiving via a second channel region a second reference signal transmitted by a second transmission point located remotely from the first transmission point, wherein the first channel region includes a region portion that is not included in the second channel region;
analyzing the received first reference signal to determine how first certain parameters of the first signal are influenced by the first channel region;
analyzing the received second reference signal to determine how second certain parameters of the second signal are influenced by the second channel region;
analyzing temporal variations of said first certain parameters during a certain time, wherein the temporal variation of said first certain parameters differs based on a movement of a motion detector device and a movement of objects surrounding the motion detector device;
analyzing temporal variations of said second certain parameters during the certain time, wherein the temporal variation of said second certain parameters differs based on a movement of the motion detector device and a movement of objects surrounding the motion detector device;
determining, based on the analysis of the temporal variations of said first and second certain parameters, whether an object is located in the region portion of the first channel region that is not included in the second channel region; and
determining, based on the analysis of the temporal variations of said first and second certain parameters, whether the motion detector device has moved within the certain time.

12. The method according to claim 11 , wherein the method comprises one or more of detection of motion of objects surrounding a motion detector device, used for detection of said motion, and detection if the motion detector device is moved.

13. The method according to claim 11 , wherein the method comprises receiving ambient electromagnetic radiation in the form of signals transmitted by at least two spatially separated sources.

14. The method according to claim 11 , wherein the method comprises forming an average channel response for a number of channel responses during a certain time, where the step of analyzing temporal variations of said certain parameters during a certain time comprises analyzing variations around the average channel response.

15. The method according to claim 14 , wherein said variations around the average channel response comprise amplitude variation of peaks and fades in the instantaneous channel responses, which variation is comprised in said temporal variations.

16. The method according to claim 14 , wherein said variations around the average channel response comprise positional variation of peaks and fades in the instantaneous channel responses which variation is comprised in said temporal variations.

17. The method according to claim 11 , wherein the step of analyzing temporal variations of said certain parameters during a certain time comprises analyzing Doppler shifts.

18. The motion detector device according to claim 6 , wherein the analyzer is further arranged to form an instantaneous channel response, where the analysis of temporal variation of

Assignees

• Furuskog Johan
• Medbo Jonas
• Ringström Markus
• ERICSSON TELEFON AB L M (publ)

Inventors

• Furuskog Johan
• Medbo Jonas
• Ringström Markus

Classifications

• G01S13/003 Primary

  Bistatic radar systems; Multistatic radar systems · CPC title

• H04W64/006

  with additional information processing, e.g. for direction or speed determination · CPC title

• G01S11/02 Primary

  using radio waves (G01S19/00 takes precedence) · CPC title

• G01S13/04 Primary

  Systems determining presence of a target (based on relative movement of target G01S13/56) · CPC title