Comments, with reply, on `Matrix formulation for Dolph-Chebyshev beamforming´ by A. Zielinski

In the above-titled letter by A. Zielinski (see ibid., vol.74, p.1799-1800, Dec. 1986), two linear sampling intervals are proposed for the matrix determination of Dolph-Chebyshev weights, for the case of a linear array consisting of an even number of elements. However, it appears that the use of either interval results identically in a rank-deficient coefficient matrix, such that a solution is not possible. The commenter proposes nonlinear sampling intervals for both an even and odd number of elements which do not appear to display this difficulty. Zielinski replies that there is a typographical error in the original paper. This correction has been published (see ibid. vol.77, p.934, Jun 1989)