... Applebaum and D J Chapman, Adaptive arrays with main beam constraints,” IEEE Trans Antennas and Propagation, vol 24, no 5, pp 650–662, 1976 An Approximate Algorithm for Robust Adaptive Beamforming ... with robustness and broad-band capabilities,” IEEE Trans Antennas and Propagation, vol 32, no 9, pp 944–950, 1984 [12] K Takao and N Kikuma, “Tamed adaptive antenna array,” IEEE Trans Antennas and ... spacing equal to one-half wavelength, and added a white noise with mean and variance 0.01(= σn ) to the array input An Approximate Algorithm for Robust Adaptive Beamforming 2679 40 10 30 −10 SINR (dB)...