ADAPTIVE INTERFERENCE SUPPRESSION VIA SUBBAND POWER MEASUREMENTS OF A PHASED-ARRAY ANTENNA

摘要

A phased-array antenna system includes an array of antenna feed elements that produces a radiation pattern to provide spot beams within which to receive a signal in a frequency band and carrying communication from a terminal at a known geographic location. A beamformer forms the spot beams; and a channelizer divides the frequency band into frequency subbands, and measures power levels of the signal over respective frequency subbands. And an antenna controller selects a frequency subband based on the measured power levels indicating that the signal includes an identifiable interference, and calculates a set of beam weights based on the measured power level over the selected frequency subband, and based on the known geographic location of the terminal. The beamformer, then, forms the spot beams based on the calculated set of beam weights to thereby suppress at least some of the identifiable interference from the signal.

主权项

1. A phased-array antenna system comprising:
a beamformer configured to form a plurality of spot beams; an array of antenna feed elements coupled to the beamformer and configured to produce a radiation pattern to provide the spot beams within which the array of antenna feed elements is configured to receive a signal in a frequency band, the signal carrying communication from a terminal at a known geographic location; a channelizer coupled to the beamformer and configured to divide the frequency band into a plurality of frequency subbands, and measure power levels of the signal over respective frequency subbands; and an antenna controller coupled to the channelizer and beamformer, the antenna controller being configured to:
select a frequency subband of the frequency subbands based on the measured power levels indicating that the signal includes an identifiable interference; andcalculate a set of beam weights based on the measured power level over the selected frequency subband, and based on the known geographic location of the terminal, wherein the beamformer being configured to form the spot beams includes being configured to form the spot beams based on the calculated set of beam weights to thereby suppress at least some of the identifiable interference from the signal.