Comments on "Experimental and theoretical comparison of some algorithms for beamforming in single receiver adaptive arrays" [with reply]

B.G. Wahlberg, I.M.Y. Mareels, and I. Webster (see ibid., vol.39, no.1, p.21, 1991) present a simple algorithm to estimate the covariance matrix by perturbing the weights W. Zhao and Ju point out that section II of the paper contains two errors. The basic error is in equation (17). This leads to errors in equation (18). Wahlberg et al. reply to the Comments.<
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