CPC H04B 7/0413 (2013.01) [H04B 17/12 (2015.01)] | 20 Claims |
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.
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