Multiple antenna communication system configured to detect objects

Patent metadata

Field	Value
Publication number	US-9766324-B2
Application number	US-201514705693-A
Country	US
Kind code	B2
Filing date	May 6, 2015
Priority date	May 6, 2015
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

Methods, systems, apparatuses, and computer program products are provided for detecting objects, including humans, using a mobile communications device. A communication space is scanned with a beam-shaped signal transmitted by a phased antenna array of the mobile communications device. Information is discerned from one or more attenuated signals received from the communication space based on the beam-shaped signal. The information is analyzed to determine an object in the communication space. Whether the object is likely at least a portion of a human is determined. A communication signal transmitted by the phased antenna array is modified in response to determining that the object is likely at least a portion of a human, and that the at least a portion of the human has a predetermined spatial relationship with the phased antenna array.

First claim

What is claimed is:

1. A method comprising:
scanning a communication space with a beam-shaped signal transmitted by a phased antenna array;
receiving information discerned from one or more attenuated signals received from the communication space based on the beam-shaped signal;
analyzing the information to determine an object in the communication space;
determining that the object is likely at least a portion of a human; and
modifying a communication signal transmitted by the phased antenna array based on determining that the at least a portion of a human has a predetermined spatial relationship with the phased antenna array.

2. The method of claim 1 , wherein said receiving comprises:
receiving the information from a communications device that received the one or more attenuated signals.

3. The method of claim 2 , wherein the information indicates a received power of the one or more attenuated signals at the communications device; and
said analyzing comprises:
determining a path loss based on difference between a transmitted power of the beam-shaped signal and the received power of the one or more attenuated signals.

4. The method of claim 1 , wherein said receiving comprises:
receiving, by at least one antenna of the mobile communications device, the one or more attenuated signals as one or more reflected signals.

5. The method of claim 4 , wherein the information indicates a received power of the one or more reflected signals at the mobile communications device; and
said analyzing comprises:
determining a power loss based on a difference between a transmitted power of the beam-shaped signal and the received power of the one or more reflected signals.

6. The method of claim 1 , wherein said analyzing comprises:
determining the object in the communication space based on at least one of an absorbed power or a reflected power for the object; and
said determining that the object is likely at least a portion of a human comprises:
determining that the absorbed power or the reflected power for the object substantially matches that of a human.

7. The method of claim 6 , wherein said determining that the object is likely at least a portion of a human comprises:
constructing a power map as a map of path loss, absorbed power, or reflected power for the communication space;
determining a shape of the object based on the power map; and
determining that the shape of the object substantially matches that of at least a portion of a human.

8. A device comprising:
a phased antenna array;
at least one processor circuit; and
at least one memory device that stores program code configured to be executed by the at least one processor circuit, the program code comprising:
a beam scanner controller configured to control the phased antenna array to transmit a beam-shaped signal to scan a communication space;
an object detector configured to receive information discerned from one or more attenuated signals received from the communication space based on the beam-shaped signal, and to analyze the information to determine an object in the communication space;
an object identifier configured to determine whether the object is likely at least a portion of a human;
a spatial relationship determiner configured to, based on determining the object is likely at least a portion of a human, determine whether the at least a portion of a human has a predetermined spatial relationship with the phased antenna array; and
a communication signal controller configured to modify a communication signal transmitted by the phased antenna array based on determining that the at least a portion of a human has the predetermined spatial relationship with the phased antenna array.

9. The device of claim 8 , further comprising:
a transceiver that receives the information from a communications device that received the one or more attenuated signals.

10. The device of claim 9 , wherein the information indicates a received power of the one or more attenuated signals at the communications device; and
the object detector is configured to determine a path loss based on a difference between a transmitted power of the beam-shaped signal and the received power of the one or more attenuated signals.

11. The device of claim 8 , further comprising:
a transceiver that receives, by at least one antenna of the device, the one or more attenuated signals as one or more reflected signals.

12. The device of claim 11 , wherein the information indicates a received power of the one or more reflected signals at the device; and
the object detector is configured to determine a power loss based on difference between a transmitted power of the beam-shaped signal and the received power of the one or more reflected signals.

13. The device of claim 8 , wherein the object detector is configured to determine the object in the communication space based on at least one of an absorbed power or a reflected power for the object; and
the object identifier is configured to determine that the object is likely at least a portion of a human by determining that the absorbed power or the reflected power for the object substantially matches that of a human.

14. The device of claim 13 , wherein the object identifier is configured to:
construct a power map as a map of path loss, absorbed power, or reflected power for the communication space;
determine a shape of the object based on the power map; and
determine that the shape of the object substantially matches that of at least a portion of a human.

15. A device comprising:
a phased antenna array; and
a circuit in communication with the antenna, the circuit configured to:
scan a communication space with a beam-shaped signal transmitted by the phased antenna array;
receive information discerned from one or more attenuated signals received from the communication space based on the beam-shaped signal;
analyze the information to determine an object in the communication space;
determine that the object is likely at least a portion of a human; and
modify a communication signal transmitted by the phased antenna array in response to determining that the at least a portion of a human has a predetermined spatial relationship with the phased antenna array.

16. The device of claim 15 , wherein the circuit is configured to receive the information from a communications device that received the one or more attenuated signals.

17. The device of claim 16 , wherein the information indicates a received power of the one or more attenuated signals at the communications device; and
the circuit is configured to determine a path loss based on difference between a transmitted power of the beam-shaped signal and the received power of the one or more attenuated signals.

18. The device of claim 16 , wherein the circuit is configured to:
determine the object in the communication space based on at least one of an absorbed power or a reflected power for the object; and
determine that the absorbed power or the reflected power for the object substantially matches that of a human to determine that the object is likely at least a portion of a human.

19. The device of claim 15 , wherein the circuit is configured to receive, by at least one antenna of the device, the one or more attenuated signals as one or more reflected signals.

20. The device of claim 19 , wherein the information indicates a received power of the one or more reflected signals at the device; and
the circuit is configured to determine a power loss based on a d

Assignees

• Microsoft Technology Licensing Llc

Inventors

• Katz Marshall Joseph
• Khawand Charbel

Classifications

• G01S2013/0254

  Active array antenna · CPC title

• G01S7/411

  Identification of targets based on measurements of radar reflectivity (G01S7/415 takes precedence) · CPC title

• G01S7/4008 Primary

  of transmitters · CPC title

• H01Q1/245 Primary

  with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure · CPC title

• H04B1/3838

  Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use · CPC title