Design of Multiplierless Linear-Phase Comb Corrector Filters for Multirate Applications
This paper presents an efficient design of comb-based decimation filters extensively used in the first stage of multistage decimation architectures. The contribution of this work is the introduction of a multiplierless Finite Impulse Response (FIR) low-order linear-phase corrector filter to decrease the passband droop while simultaneously improving the attenuation of classical comb filters in the so-called folding bands. Upon using polyphase decomposition, the proposed filters can be operated at a lower rate. The resulting filters feature compensated passband droop and higher folding-band attenuation than traditional comb filters, while require only shift-and-add operations. Comparisons with other architectures in literature are provided to emphasize the main features along with the key design steps of the proposed filters.
2012 IEEE 3rd Latin American Symposium on Circuits and Systems (LASCAS)
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Laddomada, Massimiliano; Romero, D. E.; and Dolecek, G. J., "Design of Multiplierless Linear-Phase Comb Corrector Filters for Multirate Applications" (2012). Institute of Technology Publications. 131.