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

A new architecture for the implementation of high-order decimation filters is described. It combines the cascaded integrator-comb (CIC) multirate filter structure. Application of filter sharpening to cascaded integrator-comb decimation filters. Authors: Kwentus, A. Y.; Jiang, Zhongnong; Willson, A. N.. Publication. As a result, a computationally efficient comb-based decimation filter is obtained of filter sharpening to cascaded integrator-comb decimation filters, IEEE Trans.

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The frequency response can be improved by multi-stage implementation approach [1]. For the comb-based decimation filter, the range limits for X p and X s are. Further, this structure also improves the overall throughput rate.

Thus the second sharpened stage operates at lower sampling rate which is M1 times lower than the input sampling rate. Sharpening the response cecimation a symmetric non-recursive filter by multiple use of the same filter. Therefore, preserving a simple sharpening polynomial and improving the stopbands with ibtegrator-comb increase of Kas suggested in [ 23 ], do not guarantee a result with low computational complexity.

This paper has citations. Let us call this filter H b z. A high speed digital decimation filter with parallel cascaded integrator-comb pre-filters. A new modified comb-rotated sinc RS decimator with improved filtre response. The implementation of second and third sharpened stage is shown in Fig. Problem Motivation, Contributions, and Paper Organization The reasons at the very basis of this work stem from the following observations.

Application of filter sharpening to cascaded integrator-comb decimation filters

Further the third stage operates at M2 times the lower sampling rate cazcaded the second stage and the frequency response of second stage is further sharpened by third stage. References Publications referenced by this paper. Showing of 9 references.

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See our FAQ for additional information. The main motive of this paper is to design a Sharpened decimation filter based on sharpening technique [12] with all the integrated advantages of existing scheme in order to achieve the better frequency response in pass-band as well as stop-band as compared to existing CIC structures for decimation.

The reasons at the very basis of this work stem from the following observations. Saramaki T, Ritoniemi T. However, in these cases, the filter in the first stage introduces a passband droop that cannot be corrected neither by resorting to traditional Kaiser-Hamming sharpening [ 27 ] nor by using the recent Chebyshev sharpening [ 22 ] applied to the comb filter placed in the second stage. Optimal Sharpening of CIC filters and an efficient implementation through Saramaki-Ritoniemi decimation filter structure.

In proposed sharpened structure, the first stage is with decimation factor M1 can be realized in conventional recursive or non-recursive scheme.

Application of filter sharpening to cascaded integrator-comb decimation filters

As Coleman pointed out in [ 22 ], these optimization resources could be inaccessible to many designers. Therefore dscimation the above discussed results, it can be concluded that the stage operating at higher sampling rate must have lowest possible decimation ratio to achieve the better frequency response.

Therefore there is a need of anti-aliasing filter, through which signal must be processed before starting the decimation process [1] and this complete structure is commonly known as decimation filter. Modified comb filter structure for decimation. An effective way to prevent this problem consists in designing nonrecursive filters [ 347 ] with filtering implemented in polyphase form for ensuring power savings.

Compensated sharpened comb decimation filter Gordana Jovanovic Dolecek 7th International Symposium on Image and…. Received Aug 31; Accepted Oct However, in methods [ 2324 ] the filter designer does not have control on the exact passband deviation and stopband attenuation achieved by the designed filter. The simulation results also verify the design of proposed sharpened decimation filter.

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Thus, a different sharpening approach has to be pursued. But to improve the response of stop-band price has to be paid. With this background, let us review the literature in these three categories. In addition, we have. In the light of the previous observations, the contributions of this work are the following.

Design of Modified Three Stage Sharpened CIC Filter for Decimation

In all the three cases, proposed sharpened decimation filter shown improvement in pass-band droop and stop-band alias rejection as compared to existing conventional CIC filter [2] and modified sharpened CIC filter [11]. Figure 3 shows the magnitude response of these filters, along with detail in passband and the first folding band.

Then, solve the problem 18 for s. The zero-phase frequency response is. Citations Publications citing this paper. Stephen G, Stewart RW. The optimization problem in 18 is a constrained mixed tk linear programming MILP problem whose solution can be obtained with generic MILP solvers.

Showing of extracted citations. Many filter sharpening techniques have been proposed by [] to design CIC decimation filter with applicatipn frequency response. Dolecek GJ, Harris F. The method is based on idea of amplitude change function ACF that is restricted to symmetric FIR filter with constant pass band and stop band.