 for formula_310 and formula_311 and ... formula_312 shown in figure (shown for 2-D case), the coefficients formula_297 are obtained.The coefficients formula_296 can be obtained from

formula_324

The major advantage of Shank's method is that IIR filter coefficients can be obtained by solving linear equations.The disadvantage is that the mean squared error between formula_12 and formula_244 is not minimized.