AVOIDING SELF INTERFERENCE USING CHANNEL STATE INFORMATION FEEDBACK
Disclosed herein is a system, apparatus, and method for reducing self-interference within a wireless network device using channel state information feedback and beamforming techniques. The self-interference within a device may be reduced by first transmitting, by a first circuitry, a first set signals using a first radiation pattern through a first set of antennas coupled with the first circuitry. Then, based on feedback information associated with the first set of signals detected by a second circuitry of the device, a second radiation pattern to be used by the first circuitry and the first set of antennas that reduces receipt of signals by the second circuitry that are transmitted by the first set of antennas or leaked from the first circuitry may be determined. Thereafter, a second set of signals may be transmitted by the first set of antennas using the second radiation pattern.
1 . A non-transitory computer-readable medium comprising instructions which, when executed by one or more hardware processors, cause performance of operations comprising:
transmitting, by a first set of antennas of a device currently coupled with a first circuitry, a first set of one or more signals using a first radiation pattern;
based on feedback information associated with the first set of signals detected by a second circuitry of the device, determining a second radiation pattern to be used by the first circuitry and the first set of antennas, the second radiation pattern reducing receipt of signals, by the second circuitry, that are transmitted by the first set of antennas or leaked from the first circuitry; and
transmitting, by the first set of antennas of the device, a second set of one or more signals using the second radiation pattern.
2 . The non-transitory computer-readable medium of claim 1 , wherein the first set of antennas are coupled with the second circuitry, and the signals detected by the second circuitry are signals detected using only the first set of antennas.
3 . The non-transitory computer-readable medium of claim 1 , wherein the signals detected by the second circuitry comprise signals detected using a second set of antennas coupled with the second circuitry.
4 . The non-transitory computer-readable medium of claim 1 , wherein the feedback information is based on the first set of signals detected from (a) the first set of antennas and/or (b) signal leakage from the first circuitry.
5 . The non-transitory computer-readable medium of claim 1 , wherein the first set of antennas comprise two or more antennas.
6 . The non-transitory computer-readable medium of claim 1 , wherein the first set of signals comprise sounding frames.
7 . The non-transitory computer-readable medium of claim 6 , wherein the feedback information comprises Channel State Information (CSI) associated with the sounding frames.
8 . The non-transitory computer-readable medium of claim 1 , wherein the first set of one or more signals are received by the second circuitry at a signal strength that is above a noise floor calibrated for the second circuitry, and wherein the second set of one or more signals are received by the second circuitry at a signal strength that is below the noise floor calibrated for the second circuitry.
9 . The non-transitory computer-readable medium of claim 1 , wherein the second antenna radiation pattern used by the first set of antennas is determined using a null steering matrix to create a null for the second circuitry.
10 . The non-transitory computer-readable medium of claim 1 , wherein the second circuitry receives a third set of signals transmitted by a second device at a higher signal strength than the second set of signals, wherein the third set of signals and the second set of signals are transmitted at approximately the same time.
11 . A device comprising:
a first set of antennas;
a first circuitry currently coupled with the first set of antennas;
a second circuitry;
a controller configured to control the first circuitry and the second circuitry; and
a non-transitory memory coupled to the controller, the memory containing instructions which, when executed by the controller, cause the controller to perform operations comprising:
transmitting, by the first set of antennas of the device, a first set of one or more signals using a first radiation pattern;
based on feedback information associated with the first set of signals detected by the second circuitry of the device, determining a second radiation pattern to be used by the first circuitry and the first set of antennas, the second radiation pattern reducing receipt of signals, by the second circuitry, that are transmitted by the first set of antennas or leaked from the first circuitry; and
transmitting, by the first set of antennas of the device, a second set of one or more signals using the second radiation pattern.
12 . The device of claim 11 , wherein the first set of antennas are coupled with the second circuitry, and the signals detected by the second circuitry are signals detected using only the first set of antennas.
13 . The device of claim 11 , wherein the device comprises a second set of antennas currently coupled with the second circuitry, and wherein the signals detected by the second circuitry comprise signals detected using the second set of antennas.
14 . The device of claim 11 , wherein the feedback information is based on the first set of signals detected from (a) the first set of antennas and/or (b) signal leakage from the first circuitry.
15 . The device of claim 11 , wherein the first set of antennas comprise two or more antennas.
16 . The device of claim 11 , wherein the first set of signals comprise sounding frames.
17 . The device of claim 16 , wherein the feedback information comprises Channel State Information (CSI) associated with the sounding frames.
18 . The device of claim 11 , wherein the first set of one or more signals are received by the second circuitry at a signal strength that is above a noise floor calibrated for the second circuitry, and wherein the second set of one or more signals are received by the second circuitry at a signal strength that is below the noise floor calibrated for the second circuitry.
19 . The device of claim 11 , wherein the second antenna radiation pattern used by the first set of antennas is determined using a null steering matrix to create a null for the second circuitry.
20 . The device of claim 11 , wherein the second circuitry receives a third set of signals transmitted by a second device at a higher signal strength than the second set of signals, wherein the third set of signals and the second set of signals are transmitted at approximately the same time.