US 11,742,900 B2
System and method for interference cancellation
Jung-Il Choi, Sunnyvale, CA (US); and Mayank Jain, Sunnyvale, CA (US)
Assigned to Kumu Networks, Inc., Sunnyvale, CA (US)
Filed by Kumu Networks, Inc., Sunnyvale, CA (US)
Filed on Dec. 8, 2022, as Appl. No. 18/77,995.
Claims priority of provisional application 63/403,658, filed on Sep. 2, 2022.
Claims priority of provisional application 63/362,289, filed on Mar. 31, 2022.
Claims priority of provisional application 63/316,199, filed on Mar. 3, 2022.
Claims priority of provisional application 63/287,787, filed on Dec. 9, 2021.
Prior Publication US 2023/0188182 A1, Jun. 15, 2023
Int. Cl. H04B 7/0413 (2017.01); H04B 17/12 (2015.01)
CPC H04B 7/0413 (2013.01) [H04B 17/12 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A method of interference cancellation for a multiple-input multiple-output (MIMO) communication system having a plurality of transmit elements and a plurality of receive elements, the method comprising, while the MIMO communication system targets a first set of user equipment (UE) for downlink communications and targets a second set of UE for uplink communications:
at an interference cancellation system comprising a plurality of analog taps, each analog tap of the plurality connected between a respective transmit element of the MIMO communication system and a respective receive element of the MIMO communication system, wherein each analog tap of the plurality is configurable:
determining a first set of analog tap configurations by performing a first optimum search, based on a first cancellation objective function associated with a set of self-interference channels defined by the MIMO communication system, over an analog tap configuration parameter space associated with the plurality of analog taps; and
in response to determining the first set of analog tap configurations, configuring the plurality of analog taps based on the first set of analog tap configurations;
while the plurality of analog taps is configured based on the first set of analog tap configurations, determining a first beamforming configuration by performing a second optimum search, based on a first beamforming objective function, over a beamforming parameter space, wherein the first beamforming objective function is associated with:
the set of self-interference channels;
a transmit gain for transmissions from the MIMO communication system to the first set of UE; and
a receive gain for transmissions from the second set of UE to the MIMO communication system; and
in response to determining the first beamforming configuration, providing information indicative of the first beamforming configuration to the MIMO communication system;
wherein each receive element of the plurality is associated with a respective blocker channel of the set of self-interference channels, wherein each transmit element of the plurality is associated with a respective adjacent-channel leakage (ACL) channel of the set of self-interference channels.