System, Method and Computer-readable Medium for Actively Cancelling Interference Signals

• US 20110039496A1
• Filed: 08/17/2009
• Published: 02/17/2011
• Est. Priority Date: 08/17/2009
• Status: Active Grant

• Current Assignee: UCOM Incorporated (Deutsche Telekom AG)
• Original Assignee: Joseph Chueh
• Inventors: Li, Yonghui, Chueh, Joseph, Guo, Bin, Vucetic, Branka
• Granted Patent: US 9,083,481 B2
• Time in Patent Office: Days
• US Class Current: 455/63.1
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04J 11/0036 at the receiver

Abstract

This invention discloses a system, method and computer-readable medium for actively cancelling interference signals. The system mentioned above communicates with at least one first transceiver. The abovementioned system includes at least one second transceiver, and a relay base station receiving a feedback signal from the at least one second transceiver and an environmental signal to execute a signal correlation function to get a result and determining to generate an anti-interference signal depending on the result. Herein, the relay base station cancels interference signals around the at least one first transceiver by sending the anti-interference signal to the at least one first transceiver via at least one third transceiver having an optimal communication channel to the at least one first transceiver.

Claims

1. A system for actively cancelling interference signals, said system communicating with at least one first transceiver, said system comprising:

at least one second transceiver; and

a relay base station, receiving a feedback signal from said at least one second transceiver and an environmental signal to execute a signal correlation function to get a result, determining to generate an anti-interference signal depending on said result,

wherein, said relay base station cancels interference signals around said at least one first transceiver by sending said anti-interference signal to said at least one first transceiver via at least one third transceiver.

2. The system according to claim 1, wherein said relay base station generates said anti-interference signal when said result is more than or equal to a predetermined threshold.

3. The system according to claim 1, wherein said anti-interference signal is equivalent to 180 degree phase inverted signal of the sum of interference signals.

4. The system according to claim 1, wherein said relay base station further sends a position data with said anti-interference signal to said at least one third transceiver to guide said anti-interference signal to said at least one first transceiver.

5. The system according to claim 1, wherein said at least one third transceiver has an optimal communication channel away from said at least one first transceiver.

6. The system according to claim 1, wherein said at least one third transceiver comprises a directional antenna.

7. The system according to claim 1, wherein said at least one third transceiver is said at least one second transceiver.

8. The system according to claim 1, wherein the power of said relay base station should be bigger than a specific value depending on the power of said at least one second transceiver.

9. A method for actively cancelling interference signals of at least one first transceiver in a communication system, said method comprising:

(a) receiving a feedback signal from at least one second transceiver and detecting an environmental signal by a relay base station;

(b) correlating said feedback signal and said environmental signal to get a result by said relay base station;

(c) determining to generate an anti-interference signal by said relay base station depending on said result; and

(d) cancelling interference signals around said at least one first transceiver by said relay base station in sending said anti-interference signal to said at least one first transceiver via at least one third transceiver.

10. The method according to claim 9, wherein step (c) comprises the determining step as follow:

generating said anti-interference signal when said result is more than or equal to a predetermined threshold.

11. The method according to claim 9, wherein said anti-interference signal is equivalent to 180 degree phase inverted signal of the sum of interference signals.

12. The method according to claim 9, wherein step (d) comprises the cancelling step as follow:

sending a position data with said anti-interference signal to said at least one third transceiver to guide said anti-interference signal to said at least one first transceiver.

13. The method according to claim 9, wherein step (d) further comprises a searching step as follow:

searching said at least one third transceiver, which has an optimal communication channel away from said at least one first transceiver.

14. The method according to claim 9, wherein said at least one third transceiver comprises a directional antenna.

15. The method according to claim 9, wherein said at least one third transceiver is said at least one second transceiver.

16. The method according to claim 9, wherein the power of said relay base station should be bigger than a specific value depending on the power of said at least one second transceiver.

17. A computer-readable medium encoded with computer program code for actively cancelling interference signals of at least one first transceiver in a communication system, the program code causing a computer to execute a method comprising:

(a) receiving a feedback signal from at least one second transceiver and detecting an environmental signal;

(b) correlating said feedback signal and said environmental signal to get a result;

(c) determining to generate an anti-interference signal depending on said result; and

(d) cancelling interference signals around said at least one first transceiver by sending said anti-interference signal to said at least one first transceiver via at least one third transceiver.

18. The computer-readable medium according to claim 17, wherein step (c) comprises the determining step as follow:

generating said anti-interference signal when said result is more than or equal to a predetermined threshold.

19. The computer-readable medium according to claim 17, wherein said anti-interference signal is equivalent to 180 degree phase inverted signal of the sum of interference signals.

20. The computer-readable medium according to claim 17, wherein step (d) comprises the cancelling step as follow:

sending a position data with said anti-interference signal to said at least one third transceiver to guide said anti-interference signal to said at least one first transceiver.

21. The computer-readable medium according to claim 17, wherein step (d) further comprises a searching step as follow:

searching said at least one third transceiver, which has an optimal communication channel away from said at least one first transceiver.

22. The computer-readable medium according to claim 17, wherein said at least one third transceiver comprises a directional antenna.

23. The computer-readable medium according to claim 17, wherein said at least one third transceiver is said at least one second transceiver.

24. A system for actively cancelling interference signals, said system communicating with at least one first transceiver, said system comprising:

a communication network, linking with said at least one first transceiver;

a relay base station, receiving a feedback signal and an environmental signal from said communication network to execute a signal correlation function to get a result, determining to generate an anti-interference signal depending on said result,

wherein, said relay base station cancels interference signals around said at least one first transceiver by sending said anti-interference signal to said at least one first transceiver via said communication network.

25. The system according to claim 24, wherein said relay base station generates said anti-interference signal when said result is more than or equal to a predetermined threshold.

26. The system according to claim 24, wherein said anti-interference signal is equivalent to 180 degree phase inverted signal of the sum of interference signals.

27. The system according to claim 24, wherein said communication network comprises a plurality of second transceivers linking with said relay base station.

28. The system according to claim 27, wherein said relay base station receives said feedback signal from one of said plurality of second transceivers which links with said at least one first transceiver, and receives said environmental signal from the others of said plurality of second transceivers.

29. The system according to claim 27, wherein said relay base station further sends a position data with said anti-interference signal to at least one of said plurality of second transceivers to guide said anti-interference signal to said at least one first transceiver.

30. The system according to claim 29, wherein said at least one of said plurality of second transceivers has an optimal communication channel away from said at least one first transceiver.

31. The system according to claim 29, wherein said at least one of said plurality of second transceivers comprises a directional antenna.

32. The system according to claim 27, wherein the power of said relay base station should be bigger than a specific value depending on the power of said plurality of second transceivers.