Adaptive signal processing for interference cancellation in hearing aids
Signal Processing
A new criterion for the design of variable fractional-delay FIR digital filters
IEEE Transactions on Circuits and Systems Part I: Regular Papers
Application of filter sharpening to cascaded integrator-combdecimation filters
IEEE Transactions on Signal Processing
Weighted-Least-Squares Design of Variable Fractional-Delay FIR Filters Using Coefficient Symmetry
IEEE Transactions on Signal Processing
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In this paper, a new approach is proposed for the design of infinite-impulse-response (IIR) comb filter. The problem of the comb filter design is transformed into that of fractional delay filter design. Using the proposed method, the multiplier inside the proposed structure can be fixed regardless the value of fundamental frequency of harmonic interferences. This improvement makes the proposed structure be possible for the design of variable cases. To realize variable comb (VC) filter, the variable fractional-delay (VFD) filter is designed in weighted least-squares (WLS) sense first. Then, by embedding the designed VFD filter with a switch, the variable comb filter could be implemented in a proposed structure. Several experimental results and examples are presented to demonstrate the effectiveness of the proposed method.