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The maximin algorithm is a blind adaptive-array algorithm that provides simultaneous interference suppression and beamforming in a frequency-hopping communication system. Against frequency-hopping multiple-access interference, however, it is found that the maximin array relies exclusively on its beamforming to limit its susceptibility to the narrowband, time-varying interference. The estimated steering vector (ESV) algorithm is a new algorithm that provides superior beamforming. The performance advantage of the ESV array relative to the maximin array becomes increasingly significant as the hop duration decreases.