Efficient computation of mixed higher partials of digital filter transfer functions
S. C. Bass, S E Belter · IEEE Transactions on Acoustics Speech and Signal Processing · 1976
A concise formula is derived for the computation of mixed higher partial derivatives of digital filter transfer functions with respect to any combination of multiplier coefficients. If only one multiplier coefficient is involved in the differentiation, our formula specializes to a recent result of Crochiere [1].