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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We introduce a low-complexity structure in which the intebrator-comb multiplierless compensator can be embedded into the cascaded chain of comb filters working at lower rate. Create fA and b using 20 — In this paper, we propose to use the general sharpening polynomial from 5finding the coefficients through optimization. Thus, a different sharpening approach has to be pursued.

The design and multiplier-less realization of software radio receivers with reduced system delay. An economical class of digital filters for decimation and interpolation. Figure 4 shows the magnitude response characteristics of these filters along with passband and first folding band details. This paper has citations.

Application of filter sharpening to cascaded integrator-comb decimation filters

Design examples are presented in Section 7 where the goal is to contrast the magnitude responses of the proposed method against existing techniques, namely, the ones based on traditional Kaiser and Hamming sharpening and the Chebyshev sharpening methods recently proposed in the literature. Published online Jan The optimization problem in 18 is a constrained mixed integer linear programming MILP problem whose solution can be obtained with generic MILP solvers.

Dolecek GJ, Laddomada M. However, this may result in higher demand for chip area.

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Design of Modified Three Stage Sharpened CIC Filter for Decimation | Open Access Journals

Proposed CIC-like structure for decimation filtering with sharpened compensated comb filters. The proposed structure is implemented in three stages as shown in Fig.

Moreover, two-stage comb-based decimation schemes have gained great popularity because the comb decimation filter in the first stage, designed in nonrecursive form, can be implemented at lower rate by polyphase decomposition, thus resulting in lower power consumption. The rest of this paper is organized as follows.

Therefore from 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.

In these multirate systems, we continuously need to convert the sampling rate of the given signal into signal with desired sampling rate. These results are summarized in Table 1. This approach has been applied to traditional comb filters [ 2526 ] iintegrator-comb to magnitude-improved comb filters [ 51517202124 ].

It introduced the use of two multipliers in CIC structure, but this method did not provided any improvement in pass-band of the filter. From the previous analysis, we derive the following two important observations.

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A new modified comb-rotated sinc RS decimator with improved magnitude response. Molnar G, Vucic M.

In the passband, the behaviors of filters proposed in [ 2223 ] are similar. Understanding Digital Signal Processing. Topics Discussed in This Paper.

Optimal Sharpening of Compensated Comb Decimation Filters: Analysis and Design

Moreover, method snarpening 34 ] is focused on sharpening traditional comb filters without compensation. This class of filters require neither multipliers nor storage elements and therefore uses fewer resources as compared to other available filter structures. Problem Motivation, Contributions, and Paper Organization The reasons at the very basis of this work stem from the following observations. Any arbitrary N th degree sharpening polynomial. Conflict of Interests The cascadrd declare that there is no conflict of interests regarding the publication of this paper.

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The proposed sharpened filter produced much better improvement in filtdrs droop and better alias rejection in stop-band filyers the existing conventional CIC filter [2] and modified sharpened CIC filter [11] for the same decimation factor.

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. However, we must have monotonic magnitude characteristic over the passband region of the filter to be sharpened. Citation Statistics Citations 0 10 20 ’99 ’03 ’08 ’13 ‘ Stephen G, Stewart RW.

This paper has highly influenced 21 other papers.

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.

The main motive of this paper is to design a Sharpened decimation filter with all the integrated advantages of existing techniques in order to achieve the better frequency response than the CIC based existing structures. Stepped triangular CIC-cosine decimation filter.