APPLICATION OF FILTER SHARPENING TO CASCADED INTEGRATOR-COMB DECIMATION FILTERS PDF

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Email Address. Sign In. Application of filter sharpening to cascaded integrator-comb decimation filters Abstract: A new architecture for the implementation of high-order decimation filters is described.

It combines the cascaded integrator-comb CIC multirate filter structure with filter sharpening techniques to improve the filter's passband response. This allows the first-stage CIC decimation filter to be followed by a fixed-coefficient second-stage filter, rather than a programmable filter, thereby achieving a significant hardware reduction over existing approaches.

Furthermore, the use of fixed-coefficient filters in place of programmable-coefficient filters improves the overall throughput rate.

The resulting architecture is well suited for single-chip VLSI implementation with very high data-sample rates. We discuss an example with specifications suitable for use in a wideband satellite communication subband tuner system and for signal analysis.

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Optimal Sharpening of Compensated Comb Decimation Filters: Analysis and Design

This site uses cookies to deliver our services and to show you relevant ads and job listings. By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. This blog discusses the behavior, mathematics, and implementation of cascaded integrator-comb filters. Cascaded integrator-comb CIC digital filters are computationally-efficient implementations of narrowband lowpass filters, and are often embedded in hardware implementations of decimation, interpolation, and delta-sigma converter filtering. After describing a few applications of CIC filters, this blog introduces their structure and behavior, presents the frequency-domain performance of CIC filters, and discusses several important practical issues in implementing these filters. CIC filters are well-suited for anti-aliasing filtering prior to decimation sample rate reduction , as shown in Figure 1 a ; and for anti-imaging filtering for interpolated signals sample rate increase as in Figure 1 b.

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A Beginner's Guide To Cascaded Integrator-Comb (CIC) Filters

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