|See Also||fnbpole , fnc1pole|
Norder = SCALAR. Requested order of polynomial. Coerced to
INTEGER before local processing. Norder >= 2.
a = VECTOR, COLUMN, for return (type disregarded on input).
Polynomial coefficients. Type DOUBLE.
RETURN: novalue. Polynomial returned in argument 'a'.
Returns the coefficients of Bessel polynomials as a DOUBLE column vector 'a'. These polynomials are commonly used as the basis for analog Bessel filters which approximate constant group delay. The coefficients form a polynomial as follows:
a => a(1) + a(2)*s + a(3)*s^2 + ...
Order 'Norder' must be >= 2.
Find the coefficients of a 6th order Bessel polynomial.
O>a = novalue
Blinchikoff and Zverev, "Filtering in the Time and Frequency Domains", Krieger, Malabar, FL. 1987 (Reprint Edition)