Closed-Form Design of CIC Compensators Based on Maximally Flat Error Criterion

Molnar, Goran; Vučić, Mladen

doi:10.1109/tcsii.2011.2172522

Cited by 51 publications

(24 citation statements)

References 20 publications

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“…However, the passband droop increases with the increase of the comb parameter K. As a result, the cascade of combs is usually limited to five. The comb passband droop is corrected using compensator filters proposed in [2][3][4][5][6]. Similarly, different methods have been proposed to improve aliasing rejection, like [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Simple method to improve comb frequency characteristic in passband and folding bands

Dolecek

2017

J. Phys.: Conf. Ser.

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Abstract. The most simple decimation filter is comb filter, which has all coefficients equal to unity. The filter must attenuate aliasing which occur in the bands around the comb zeros, called folding bands. Additionally, it must have flat magnitude characteristic in the passband in order to avoid the deterioration of the decimated signal. However, comb filter has pure attenuation in the folding bands and droop in the passband of interest. The attenuation in the folding bands can be increased by cascading comb filters. Nevertheless, this process increases comb passband droop. We present here a simple method to improve simultaneously comb magnitude characteristic in both: passband and folding bands. The cascade of combs is used to improve the attenuation in the folding bands, and the compensator, cascaded with combs, improve the passband characteristic. Two cases are elaborated depending if the passband of interest is a wideband or narrowband. The comparisons with some methods from the literature confirm the benefit of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Simple method to improve comb frequency characteristic in passband and folding bands

Dolecek

2017

J. Phys.: Conf. Ser.

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“…Interpolator has designed by using direct form polyphase serial and Parallel structures and DALUT algorithm based decimator are used to enhance speed and to reduce area proposed in [12]. In [13] authors proposed a high speed CIC decimator SDR and GSM which increases the speed and also saves the resources. A high speed interpolator using embedded LUT structure for software defined radios is proposed in paper [14].…”

Section: Introductionmentioning

confidence: 99%

Improved Maximally Flat Wideband CIC Compensation Filter using Sharpening Technique

Devi¹,

Mehra²

2015

IJCA

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This paper presents the design and implementation of sharpening of maximally flat cascaded integrator comb compensation filters. The modified sharpened cascaded integrator comb compensation filter is used to improve magnitude response and gain. For wide-band compensation fourth-order linear phase filters is considered. The decimation factor of CIC filter is D and number of adders are depends upon decimation factor D. The compensation filter is a multiplier less design which works at low rate. The comparison within some methods reported in the literature is provided.

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“…Compensator filters [2][3][4][5][6] decrease the comb passband droop, while the most common structures that improve attenuation in the folding bands are based on zero-rotating [7][8][9][10]. Methods that simultaneously improve passband and stopband are traditionally based on the sharpening technique [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Applications of corrector filters to improve magnitude response of comb decimation filter

Baez

Dolecek

2014

2014 IEEE 57th International Midwest Symposium on Circuits and Systems (MWSCAS)

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This paper presents the application of simple multiplierless filters that decrease the passband droop and increase alias rejection in the folding bands of comb filters. Comparisons with some methods proposed in literature are also included, showing the benefit of the proposed approach. It is also proved that the method is convenient for the traditional non-recursive comb structure with a decimation factor that is a power of two. In that way, the magnitude characteristics of the structure are significantly improved, while keeping power efficiency of the original structure, by placing three simple filters in the last two stages.

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Closed-Form Design of CIC Compensators Based on Maximally Flat Error Criterion

Cited by 51 publications

References 20 publications

Simple method to improve comb frequency characteristic in passband and folding bands

Simple method to improve comb frequency characteristic in passband and folding bands

Improved Maximally Flat Wideband CIC Compensation Filter using Sharpening Technique

Applications of corrector filters to improve magnitude response of comb decimation filter

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