Electronic Devices, Methods, and Computer Program Products for Selecting an Antenna Element Based on a Wireless Communication Performance Criterion

• US 20130315076A1
• Filed: 05/24/2012
• Published: 11/28/2013
• Est. Priority Date: 05/24/2012
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Mobile Communications AB (Sony Group Corp.)
• Inventors: Zhao, Kun, Ying, Zhinong, Ljung, Rickard, He, Sailing, Zhang, Shuai, Bengtsson, Erik Lennart
• Granted Patent: US 8,804,560 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 7/0608 Antenna selection according to transmission parameters
• CPC Class Codes: H04B 7/082 selecting best antenna path

Abstract

A method of operating an electronic device includes providing a plurality of antenna elements, evaluating a wireless communication performance criterion to obtain a performance evaluation, and assigning a first one of the plurality of antenna elements to a main wireless signal reception and transmission path and a second one of the plurality of antenna elements to a diversity wireless signal reception path based on the performance evaluation.

Claims

1. A method of operating an electronic device, comprising:

providing a plurality of antenna elements;

evaluating a wireless communication performance criterion to obtain a performance evaluation; and

assigning a first one of the plurality of antenna elements to a main wireless signal reception and transmission path and a second one of the plurality of antenna elements to a diversity wireless signal reception path based on the performance evaluation.

2. The method of claim 1, wherein evaluating the wireless communication performance criterion comprises determining transmission power for signals transmitted through each of the plurality of antenna elements and power associated with signals reflected back through each of the plurality of antenna elements.

3. The method of claim 1, wherein evaluating the wireless communication performance criterion comprises determining Received Signal Strength Indication (RSSI) data for each of the plurality of antenna elements.

4. The method of claim 1, wherein evaluating the wireless communication performance criterion comprises processing feedback from a wireless basestation, the feedback including signal strength information for signals transmitted from each of the plurality of antenna elements.

5. The method of claim 1, wherein evaluating the wireless communication performance criterion comprises determining proximity information of structure abutting the mobile terminal via at least one sensor.

6. The method of claim 1, further comprising:

determining whether first and second communication channels associated with the main wireless signal reception path and the diversity wireless signal reception path, respectively, have changed; and

updating channel estimation models and/or multipath mitigation modules in a digital baseband signal processing section of the electronic device responsive to a determination that the first and second communication channels associated with the main wireless signal reception path and the diversity wireless signal reception path, respectively, have changed.

7. The method of claim 1, further comprising:

determining whether first and second communication channels associated with the main wireless signal reception path and the diversity wireless signal reception path, respectively, have changed;

routing signals received on the first communication channel through the diversity wireless signal reception path in a radio frequency processing section of the electronic device and through the main wireless signal reception path in a digital baseband signal processing section of the electronic device responsive to a determination that the first and second communication channels associated with the main wireless signal reception path and the diversity wireless signal reception path, respectively, have changed; and

routing signals received on the second communication channel through the main wireless signal reception path of the radio frequency processing section of the electronic device and through the diversity wireless signal reception path in the digital baseband signal processing section of the electronic device responsive to the determination that the first and second communication channels associated with the main wireless signal reception path and the diversity wireless signal reception path, respectively, have changed.

8. The method of claim 1, wherein the electronic device is a mobile terminal.

9. A computer program product comprising a non-transitory computer readable program medium, the computer readable program medium comprising computer readable program code configured to carry out the method of claim 1.

10. A method of operating an electronic device, comprising:

providing a plurality of antenna elements;

evaluating a wireless communication performance criterion to obtain a performance evaluation; and

selecting a pair of the plurality of antenna elements for use in wireless communication based on the performance evaluation.

11. The method of claim 10, wherein evaluating the wireless communication performance criterion comprises determining a Multiplexing Efficiency where the Multiplexing Efficiency is given by

Multiplexing Efficiency=√

{square root over ((1−

ρ

_∈

)η

₁η

₂)}

where η

₁ and η

₂ are a total efficiency of a first and a second one of the plurality of antenna elements, respectively and ρ

_∈

is an envelope correlation coefficient between the first and second one of the plurality of antenna elements.

12. The method of claim 11, wherein evaluating the wireless communication performance criterion comprises determining a Normalized Multiplexing Efficiency where the Normalized Multiplexing Efficiency is given by

Normalized Multiplexing Efficiency=Multiplexing Efficiency in Free Space−

Multiplexing Efficiency in a User Application.

13. The method of claim 10, wherein the electronic device is a mobile terminal.

14. A computer program product comprising a non-transitory computer readable program medium, the computer readable program medium comprising computer readable program code configured to carry out the method of claim 10.

15. An electronic device, comprising:

a plurality of antenna elements; and

antenna selection control circuitry that is configured to evaluate a wireless communication performance criterion to obtain a performance evaluation and assign a first one of the plurality of antenna elements to a main wireless signal reception and transmission path and a second one of the plurality of antenna elements to a diversity wireless signal reception path based on the performance evaluation.

16. The electronic device of claim 15, wherein the antenna selection control circuitry is configured to evaluate the wireless communication performance criterion by determining transmission power for signals transmitted through each of the plurality of antenna elements and power associated with signals reflected back through each of the plurality of antenna elements.

17. The electronic device of claim 15, wherein the antenna selection control circuitry is configured to evaluate the wireless communication performance criterion by determining Received Signal Strength Indication (RSSI) data for each of the plurality of antenna elements.

18. The electronic device of claim 15, wherein the antenna selection control circuitry is configured to evaluate the wireless communication performance criterion by processing feedback from a wireless basestation, the feedback including signal strength information for signals transmitted from each of the plurality of antenna elements.

19. The electronic device of claim 15, wherein the antenna selection control circuitry is configured to evaluate the wireless communication performance criterion by determining proximity information of structure abutting the mobile terminal via at least one sensor.

20. The electronic device of claim 15, wherein the electronic device is a mobile terminal.

21. An electronic device, comprising:

a plurality of antenna elements; and

antenna selection control circuitry that is configured to evaluate a wireless communication performance criterion to obtain a performance evaluation and select a pair of the plurality of antenna elements for use in wireless communication based on the performance evaluation.

22. The electronic device of claim 21, wherein the antenna selection control circuitry is configured to evaluate the wireless communication performance criterion by determining a Multiplexing Efficiency where the Multiplexing Efficiency is given by

Multiplexing Efficiency=√

{square root over ((1−

ρ

_∈

)η

₁η

₂)}

where η

₁ and η

₂ are a total efficiency of a first and a second one of the plurality of antenna elements, respectively and ρ

_∈

is an envelope correlation coefficient between the first and second one of the plurality of antenna elements.

23. The electronic device of claim 21, wherein the electronic device is a mobile terminal.