Date Added: Jul 2011
An extension of the design of digital equi-ripple comb FIR filters is presented. The authors introduce the fifth type of comb FIR filter which complements the existing four standard types. The design runs from the filter specifications through the degree formula to the impulse response coefficients, which are evaluated by an efficient recursive algorithm. One example is included. Comb FIR filters are often used in the digital processing of communication signals. They are mainly used in the suppression of unwanted spectral components in the signal, e.g., for the attenuation of induced power line interferences.