Adjusting application parameters for interference mitigation

• US 9,294,202 B1
• Filed: 09/24/2014
• Issued: 03/22/2016
• Est. Priority Date: 09/24/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Wietfeldt, Richard Dominic, Chrisikos, George, Wiley, George Alan
• Primary Examiner(s): Tran, Tuan A
• Application Number:
  US14/494,998
• Publication Number:
  US 20160087732A1
• Time in Patent Office: 545 Days
• Field of Search: 455/41.2, 455/63.1, 455/67.11, 455/67.13, 455/67.15, 455/67.7, 455/68, 455/69, 455/522, 455/557, 455/114.2, 455/296, 455/552.1, 455/553.1
• US Class Current: 1/1
• CPC Class Codes: H04B 1/123 using adaptive balancing or compensation means adaptive filter circuits and algorithms H03H
• CPC Class Codes: H04B 15/02 Reducing interference from electric apparatus by means located at or near the interfering apparatus
• CPC Class Codes: H04B 17/23 Indication means, e.g. displays, alarms, audible means
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

Aspects of adjusting application parameters for interference mitigation are disclosed. In one aspect, a computing device is provided that employs a control system configured to detect and mitigate electromagnetic interference (EMI) generated within the computing device. More specifically, the control system is configured to detect possible EMI conditions and adjust parameters within the computing device to mitigate such EMI. In this manner, the computing device includes an aggressor application and a victim receiver. The control system is configured to analyze performance tradeoffs based on an acceptable performance level of the aggressor application and the performance degradation experienced by the victim receiver. Based on such analysis, the control system is configured to adjust parameters associated with the aggressor application to mitigate the EMI. Thus, the control system provides designers with an additional tool that may reduce the performance degradation of the victim receiver attributable to the EMI.

Claims

1. A computing device comprising:

an aggressor application transceiver;

a central processor communicatively coupled to the aggressor application transceiver via a wired interface;

a victim receiver; and

a control system communicatively coupled to the aggressor application transceiver and the victim receiver, configured to;

determine if the victim receiver experiences electromagnetic interference (EMI) as a result of the wired interface;

determine an acceptable performance level of the aggressor application transceiver based on a performance tradeoff; and

adjust one or more parameters from among a plurality of parameters associated with the aggressor application transceiver to mitigate the EMI experienced by the victim receiver and keep the aggressor application transceiver operating at or above the acceptable performance level.

2. The computing device of claim 1, wherein the victim receiver comprises a radio frequency (RF) victim receiver.

3. The computing device of claim 1, wherein the victim receiver comprises a wireless receiver.

4. The computing device of claim 1, wherein the one or more parameters from among the plurality of parameters affect a user interface corresponding to the aggressor application transceiver.

5. The computing device of claim 4, wherein the user interface is configured to display a visual output affected by a performance level of the aggressor application transceiver.

6. The computing device of claim 1, wherein the aggressor application transceiver comprises a camera.

7. The computing device of claim 6, wherein the one or more parameters from among the plurality of parameters may be selected from the group consisting of:

a number of megapixels;

frames per second;

bits per pixel; and

blanking time.

8. The computing device of claim 1, wherein the aggressor application transceiver comprises a display.

9. The computing device of claim 8, wherein the one or more parameters from among the plurality of parameters may be selected from the group consisting of:

bits per pixel;

refresh rate; and

resolution.

10. The computing device of claim 1, wherein the aggressor application transceiver comprises a memory.

11. The computing device of claim 10, wherein the one or more parameters from among the plurality of parameters may be selected from the group consisting of:

read rate;

write rate;

internal clock frequency; and

refresh rate.

12. The computing device of claim 1, wherein the aggressor application transceiver comprises a touch screen fabric.

13. The computing device of claim 12, wherein the one or more parameters from among the plurality of parameters may be selected from the group consisting of:

touch sample rate;

sample quantization;

touch fabric physical node spacing; and

touch screen controller interface frequency.

14. The computing device of claim 1, wherein the control system is further configured to determine if the victim receiver experiences EMI as a result of the aggressor application transceiver, wherein such EMI is separate from the EMI as a result of the wired interface.

15. A method for mitigating electromagnetic interference (EMI) of a victim receiver caused by an aggressor application transceiver, comprising:

determining if a victim receiver experiences EMI as a result of a wired interface coupling an aggressor application transceiver to a central processor;

determining an acceptable performance level of the aggressor application transceiver based on a performance tradeoff; and

adjusting one or more parameters from among a plurality of parameters associated with the aggressor application transceiver to mitigate the EMI experienced by the victim receiver and keep the aggressor application transceiver operating at or above the acceptable performance level.

16. The method of claim 15, wherein determining if the victim receiver experiences EMI comprises determining a data frequency rate of the aggressor application transceiver on the wired interface.

17. The method of claim 16, wherein determining if the victim receiver experiences EMI further comprises determining one or more active channel frequencies of the victim receiver.

18. The method of claim 17, wherein determining if the victim receiver experiences EMI further comprises determining a performance impact of the wired interface on each of the one or more active channel frequencies.

19. The method of claim 15, wherein determining the acceptable performance level of the aggressor application transceiver comprises determining if a target data frequency is compliant with the performance tradeoff.

20. The method of claim 19, wherein determining the acceptable performance level of the aggressor application transceiver further comprises determining if the target data frequency is a function of the one or more parameters from among the plurality of parameters.

21. The method of claim 20, wherein adjusting the one or more parameters comprises adjusting the one or more parameters from among the plurality of parameters required to cause the wired interface to reflect the target data frequency.

22. The method of claim 21, wherein adjusting the one or more parameters comprises adjusting a clock frequency corresponding to the aggressor application transceiver.

23. The method of claim 21, wherein adjusting the one or more parameters comprises adjusting the one or more parameters from among the plurality of parameters when the target data frequency is not a function of the one or more parameters from among the plurality of parameters.

24. The method of claim 15, wherein adjusting the one or more parameters comprises adjusting the one or more parameters from among the plurality of parameters required to reflect the acceptable performance level on a user interface corresponding to the aggressor application transceiver.

25. The method of claim 15, further comprising adjusting one or more parameters from among a plurality of parameters associated with the victim receiver to mitigate the EMI experienced by the victim receiver.

26. The method of claim 25, wherein adjusting the one or more parameters associated with the victim receiver comprises requesting that the victim receiver operate on a channel different from a current channel of the victim receiver.

27. The method of claim 15, further comprising adjusting one or more parameters from among a plurality of parameters associated with the wired interface to mitigate the EMI experienced by the victim receiver.

28. The method of claim 27, wherein the one or more parameters from among the plurality of parameters associated with the wired interface may be selected from the group consisting of:

frequency;

slew rate; and

voltage levels.

29. A mobile device comprising:

an aggressor camera;

a central processor communicatively coupled to the aggressor camera via a wired interface;

a victim receiver; and

a control system communicatively coupled to the aggressor camera and the victim receiver, configured to;

determine if the victim receiver experiences electromagnetic interference (EMI) as a result of the wired interface;

determine an acceptable performance level of the aggressor camera based on a performance tradeoff; and

adjust one or more parameters from among a plurality of parameters associated with the aggressor camera to mitigate the EMI experienced by the victim receiver and keep the aggressor camera operating at or above the acceptable performance level.

30. A non-transitory computer-readable medium having stored thereon computer executable instructions which, when executed by a processor, cause the processor to:

determine if a victim receiver experiences electromagnetic interference (EMI) as a result of a wired interface coupling an aggressor application transceiver to a central processor;

determine an acceptable performance level of the aggressor application transceiver based on a performance tradeoff; and

adjust one or more parameters from among a plurality of parameters associated with the aggressor application transceiver to mitigate the EMI experienced by the victim receiver and keep the aggressor application transceiver operating at or above the acceptable performance level.