Systems and methods for calculating frequency-localized adaptive beamformer weights using sliding windows across subcarriers

A receiver comprising:

• a processor coupled to memory;
• a plurality of antennas in communication with the processor, the plurality of antennas configured to receive data streams in a frequency band spanning multiple subcarrier frequencies;
• and
• a beamformer coupled to the plurality of antennas and in communication with the processor, the beamformer configured to receive the data streams, the beamformer comprising a weight processor configured to calculate, for each subcarrier of the frequency band, a respective plurality of weights used to generate signals for transmission by or combine the signals received at respective ones of the plurality of antennas;
• wherein the weight processor is configured to calculate weights for a particular subcarrier at least in part by:
• utilizing a window of subcarrier frequencies centered at the particular subcarrier;
• and
• calculating an inverse covariance matrix for the particular subcarrier based on a previously-calculated inverse covariance matrix for a different window of subcarrier frequencies incorporating a different subcarrier of the window of subcarrier frequencies;
• and
• wherein the weight processor is further configured to provide the respective plurality of weights for the particular subcarrier.