7.2 FIR Filter Design based on Windows Function method o We now turn our attention to the design of real coefficient fir filters o These filters are described by a transfer function that is a polynomial in z-land therefore require different approaches for their design7.2 FIR Filter Design based on Windows Function Method  We now turn our attention to the design of real coefficient FIR filters.  These filters are described by a transfer function that is a polynomial in z-1and therefore require different approaches for their design