Methods and devices for use with a multi-feed antenna used in a MIMO communication system are described herein. A method can include obtaining an antenna feed characteristic indicator associated with each of the feeds of the multi-feed antenna, and controlling how power is distributed among the feed
Methods and devices for use with a multi-feed antenna used in a MIMO communication system are described herein. A method can include obtaining an antenna feed characteristic indicator associated with each of the feeds of the multi-feed antenna, and controlling how power is distributed among the feeds based on the antenna feed characteristic indicator associated with each of the feeds. An antenna feed characteristic indicator can be, e.g., an indicator of impedance matching, in which case power can be distributed among the feeds of the multi-feed antenna based on the indicators of impedance matching associate with each of the feeds. Power can also be distributed based on an indicator of link quality. Additionally, or alternatively, coding rate and/or modulation type can also be controlled for each of the feeds of the multi-feed antenna, based on one or more antenna feed characteristic indicators and/or one or more indicators of link quality.
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1. A method for use with a multi-feed antenna used in a multi-input-multi-output (MIMO) communication system, wherein the multi-feed antenna includes at least a first feed and a second feed, the method comprising: obtaining one or more antenna feed characteristic indicators associated with each of t
1. A method for use with a multi-feed antenna used in a multi-input-multi-output (MIMO) communication system, wherein the multi-feed antenna includes at least a first feed and a second feed, the method comprising: obtaining one or more antenna feed characteristic indicators associated with each of the first and second antenna feeds of the multi-feed antenna; andcontrolling how power is distributed among the first and second antenna feeds of the multi-feed antenna based at least in part on at least one of the one or more antenna feed characteristic indicators associated with each of the first and second antenna feeds of the multi-feed antenna;wherein the controlling how power is distributed among the first and second antenna feeds of the multi-feed antenna comprises distributing at least some amount of power to each of the first and second antenna feeds, such that the amount of power distributed to each of the first and second antenna feeds differ from one another for at least a period of time. 2. The method of claim 1, wherein the controlling how power is distributed among the first and second antenna feeds of the multi-feed antenna comprises distributing more power to one of the of the first and second antenna feeds of the multi-feed antenna than to the other one of the first and second antenna feeds of the multi-feed antenna. 3. The method of claim 1, wherein: the obtaining one or more antenna feed characteristic indicators associated with each of the first and second antenna feeds of the multi-feed antenna comprises obtaining an impedance matching indicator associated with the first antenna feed and an impedance matching indicator associated with the second antenna feed; andthe controlling how power is distributed among the first and second antenna feeds of the multi-feed antenna comprises controlling how power is distributed among the first and second antenna feeds of the multi-feed antenna based at least in part on the impedance matching indicators associated with the first and second antenna feeds. 4. The method of claim 3, wherein: the impedance matching indicators associated with the first and second antenna feeds provide an indication of which of the first and second antenna feeds has better impedance matching, and which of the first and second antenna feeds has worse impedance matching; andthe controlling how power is distributed among the first and second antenna feeds of the multi-feed antenna comprises distributing more power to the one of the first and second antenna feeds of the multi-feed antenna that has the better impedance matching. 5. The method of claim 3, wherein: the impedance matching indicators associated with the first and second antenna feeds provide an indication of which of the first and second antenna feeds has better impedance matching, and which of the first and second antenna feeds has worse impedance matching; andthe controlling how power is distributed among the first and second antenna feeds of the multi-feed antenna comprises distributing more power to the one of the first and second antenna feeds of the multi-feed antenna that has the worse impedance matching. 6. The method of claim 3, further comprising: obtaining an indicator of link quality associated with a wireless communication link that is supported by the multi-feed antenna; andthe controlling how power is distributed among the first and second antenna feeds of the multi-feed antenna is also based at least in part on the indicator of link quality. 7. The method of claim 6, wherein the controlling how power is distributed among the first and second antenna feeds of the multi-feed antenna comprises: distributing more power to the one of the first and second antenna feeds having the better impedance matching than to the one of the first and second antenna feeds having the worse impedance matching, while the indicator of link quality is below a first specified link quality threshold; anddistributing more power to the one of the first and second antenna feeds having the worse impedance matching than to the one of the first and second antenna feeds having the better impedance matching, while the indicator of link quality is above a second specified link quality threshold;wherein the first and second specified link quality thresholds may or may not be the same. 8. The method of claim 1, further comprising: separately controlling a first modulation and coding scheme (MCS) for the first antenna feed and a second MCS for the second antenna feed, based at least in part on at least one of the one or more antenna feed characteristic indicators associated with each of the first and second feeds of the multi-feed antenna, so that the first and second MCSs differ from one another. 9. The method of claim 1, wherein: the multi-feed antenna also includes a third antenna feed;the obtaining one or more antenna feed characteristics also includes obtaining one or more antenna feed characteristics associated with the third antenna feed; andthe controlling how power is distributed comprises controlling how power is distributed among the first, second and third antenna feeds of the multi-feed antenna based at least in part on at least one of the one or more antenna feed characteristic indicators associated with each of the first, second and third feeds of the multi-feed antenna. 10. The method of claim 9, further comprising: obtaining an indicator of link quality associated with a wireless communication link that is supported by the multi-feed antenna; andcontrolling first, second and third modulation and coding schemes (MCSs) for the first, second and third antenna feeds of the multi-feed antenna, based at least in part on the indicator of link quality, so that at least one of the first, second and third MCSs differs from another one of the first, second and third MCSs;wherein the controlling how power is distributed among the first, second and third feeds of the multi-feed antenna is also based at least in part on the indicator of link quality. 11. A wireless communication device for use with a multi-feed antenna used in a multi-input-multi-output (MIMO) communication system, wherein the multi-feed antenna includes two or more antenna feeds, the device comprising: a storage device that stores one or more antenna feed characteristic indicators associated with each antenna feed of a multi-feed antenna; anda controller configured to control how power is distributed among the antenna feeds of the multi-feed antenna based at least in part on at least one of the one or more antenna feed characteristic indicators associated with each of the antenna feeds of the multi-feed antenna, such that each of the antenna feeds of the multi-feed antenna is distributing at least some amount of power, and such that different amounts of power are distributed to different ones of the antenna feeds of the multi-feed antenna for at least a period of time. 12. The wireless communication device of claim 11, wherein: at least one of the one or more antenna feed characteristic indicators associated with each antenna feed of the multi-feed antenna, that is stored by the storage device, comprises an impedance matching indicator associated with each of the antenna feeds of the multi-feed antenna; andthe controller is configured to control how power is distributed among the antenna feeds of the MFA based at least in part on the impedance matching indicator associated with each of the antenna feeds of the MFA. 13. The wireless communication device of claim 11, wherein the controller is configured to control how power is distributed among the antenna feeds of the multi-feed antenna also based at least in part on an indicator of link quality associated with a wireless communication link that is supported by the multi-feed antenna. 14. The wireless communication device of claim 11, further comprising: a power distributor configured to distribute power among the different feeds of the MFA as controlled by the controller. 15. The wireless communication device of claim 11, wherein the controller is also configured to control at least one of a coding rate or a modulation type for each of the feeds of the multi-feed antenna based at least in part on at least one of the one or more antenna feed characteristic indicators associated with each of the feeds of the multi-feed antenna, such that at least one of the coding rate or the modulation type differs for different ones of the antenna feeds of the multi-feed antenna. 16. The wireless communication device of claim 11, wherein the controller is also configured to control at least one of a coding rate or a modulation type for each of the antenna feeds of the multi-feed antenna based at least in part on an indicator of link quality such that at least one of the coding rate or the modulation type differs for different antenna feeds of the multi-feed antenna. 17. The wireless communication device of claim 11, further comprising the multi-feed antenna that includes the multiple antenna feeds. 18. One or more processor readable storage devices having instructions encoded thereon which when executed cause one or more processors to perform a method for use with a multi-feed antenna including a plurality of antenna feeds, the method comprising: obtaining a respective antenna feed characteristic indicator for each of the antenna feeds of the multi-feed antenna; andcontrolling modulation and coding schemes (MCSs) for the plurality of antenna feeds, based at least in part on the respective antenna feed characteristic indicator obtained for each of the antenna feeds of the multi-feed antenna, such that the MCS for one of the antenna feeds differs from the MCS for another one of the antenna feeds. 19. The one or more processor readable storage devices of claim 18, wherein the method further comprises: controlling how power is distributed among the plurality of antenna feeds of the multi-feed antenna, based at least in part on the respective antenna feed characteristic indicator obtained for each of the antenna feeds of the multi-feed antenna, such that the power distributed to one of the antenna feeds differs from the power distributed to another one of the antenna feeds. 20. The one or more processor readable storage devices of claim 19, wherein the method further comprises: obtaining an indicator of link quality associated with a wireless communication link supported by the multi-feed antenna; andwherein at least one of the controlling the MCSs for the plurality of antenna feeds or the controlling how power is distributed among the plurality of antenna feeds is also based at least in part on the indicator of link quality.
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