MINIMUM-PHASE FILTER DESIGN FROM LINEAR-PHASE STARTPOINT VIA BALANCEDMODEL TRUNCATION

A new practical design approach for minimum-phase FIR or IIR filters, setting out from a high dimensionality FIR linear-phase prototype is d escribed. The novelty of this technique lies in overcoming the inheren t problem of finding the roots of a high order polynomial with repeate d and/or very closely clustered roots.