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Gordana Jovanovic Dolecek - One of the best experts on this subject based on the ideXlab platform.
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Low power two-stage comb Decimation structures for high Decimation Factors
Analog Integrated Circuits and Signal Processing, 2016Co-Authors: Gerardo Molina Salgado, Gordana Jovanovic Dolecek, Jose M De La RosaAbstract:This paper presents power and area analysis of two-stage comb-based Decimation structures for high Decimation Factors. The first stage is either in a recursive form cascaded-integrator-comb (CIC) or in a non-recursive form, while the second stage is in a recursive form. The proposed structures are compared with a single CIC structure. We demonstrated how to choose the Decimation Factor of the first stage in order to get simultaneously the highest possible power reduction and the lowest possible area increase, in a comparison with a single CIC structure. Additionally, the modified two-stage structure with an increased attenuation and a reduced power consumption is presented. Analysis is supported by MATLAB simulations and validated by the VHDL implementations.
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modified comb decimator for high power of two Decimation Factors
Latin American Symposium on Circuits and Systems, 2014Co-Authors: Gerardo Molina Salgado, Gordana Jovanovic Dolecek, Jose M De La RosaAbstract:This paper presents a modified two-stage comb Decimation structure for Sigma-Delta Analog-to-Digital Converters (ADC) with high Decimation Factor, which can be implemented as a power of two. The proposed structure exhibits a decreased passband droop, as well as increased attenuations in the folding bands compared with the power and area efficient structures recently proposed in the literature. This is achieved by introducing a simple corrector filter at second CIC (Cascaded-Integrator-Comb) stage, such that it works at the rate, which is less than the high input rate by half of the Decimation Factor. The corrector filters depend only on the number of the cascaded equivalent combs. In that way the same corrector can be used for the comb decimator with different Decimation Factors but with the equal number of the cascaded combs. The comparison with the power and area efficient comb-based structures from literature, and the VHDL implementation, confirm the efficiency of the proposed structure.
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NOVEL SHARPENED COMPENSATED COMB DECIMATOR
2014Co-Authors: Gordana Jovanovic Dolecek, Vlatko Doleček, Bosna HerzegovinaAbstract:This paper presents the novel comb decimator. The method is based on the pass band comb compensation and the sharpening technique. The compensator is the simple multiplier less filter which can be moved to a lower rate which is M times less than the high input rate where M is the Decimation Factor. The parameters of compensator are independent of the Decimation Factor. The resulting filter is the multiplier less filter and exhibits the significantly decreased pass band droop, as well as the increased attenuation in the folding bands, compared with the corresponding comb filter
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COSINE – BASED DECIMATOR
2014Co-Authors: Gordana Jovanovic Dolecek, Vlatko DolečekAbstract:A commonly used Decimation filter is the cascaded- integrator-comb (CIC) filter, which consists of two main sections: an integrator and a comb, separated by a down-sampler. This ffilter is attractive in many applications because of its very low complexity which requires no multipliers and storages. The magnitude characteristic of this filter has a low attenuation in the stopband, and a droop in the desired passband, that is dependent upon the Decimation Factor M and the cascade size K. Additionally the integrator section works at the high input rate. In this paper we present a new Decimation filter based on cosine filters. The proposed structure is a multiplier-free and has an improved magnitude response compared with that of the corresponding conventional CIC filter. Additionally there is no filtering at the high input rate
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MULTISTAGE Decimation FILTER
2014Co-Authors: Gordana Jovanovic Dolecek, Vlatko DolečekAbstract:This paper presents one method for a multiplierless FIR (finite impulse response) Decimation filter design. The method is based on the IFIR (interpolated finite impulse response) structure and the sharpening techniques. It is supposed that the Decimation Factor can be presented as the product of two Factors. In that way the expanded model filter can be moved to the lower rate. The coefficients of the model filter are rounded to the nearest integers and the sharpening technique is applied to the model filter in order to improve the magnitude characteristics of the overall filter. The interpolator is the cascaded RRS (recursive running sum) filter and the simple compensator. As result the overall structure is multiplierless and exhibits a high attenuation in the stopband and a low passband droop
S K Mitra - One of the best experts on this subject based on the ideXlab platform.
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EFFICIENT MULTISTAGE COMB-MODIFIED ROTATED SINC (RS) DECIMATOR
2014Co-Authors: Gordana Jovanovic-dolecek, S K MitraAbstract:This paper presents a new multistage comb-rotated sinc (RS) decimator. The proposed structure consists of different cascaded comb sections, each down-sampled by a specific down-sampling Factor. The number of sections depends on the Decimation Factor of the original comb decimator. The first section is realized in a non-recursive form. Using the polyphase decomposition, the sub-filters of the first section can be operated at lower rate which depends on the down-sampling Factor of the first section. Additionally, the rotated sinc (RS) filter is cascaded in the second section, thus permitting both multipliers of the RS filter to work at the lower rate. The magnitude response of the proposed structure is better than that of the original comb decimator. Figure 1: CIC Decimation filter The above Decimation filter is attractive in many applications because of its very low complexity. It should be noted that while the differentiator section operates at the lower data rate, the integrator section works at the higher input data rate resulting in a larger chip area and a higher power consumption especially when the Decimation Factor and the filter order are high [3]. The use of a non-recursive equivalent to Eq. (1) reduces power consumption and increases the circuit speed [3-5]. More details on a comparison of the performances of the recursive and non-recursive implementation are given in [3]. In this paper we propose a new multistage structure in which the first stage is implemented non-recursively while all other stages are implemented recursively. The magnitude response of this structure is improved over that of the original comb filter by using a modified rotated sinc (RS) filter introduced in [6]. Unlike the structure advanced in [6], where one multiplier works at the high input rate, in the structure proposed in this paper, both multipliers work at the lower rate
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A NEW SHARPENED CASCADED COMB-COSINE Decimation FILTER
2008Co-Authors: Gordana Jovanovic Dolecek, S K MitraAbstract:This paper presents a new multistage comb-cosine Decimation filter with the improved magnitude response. The proposed structure consists of a comb section followed by different cascaded comb and cosine prefilter sections, each down-sampled by a specific down-sampling Factor. The number of sections depends on the Decimation Factor of the original comb decimator, and the number of cascaded filters can be different for different stages. The first section is realized in a non-recursive form. Using the polyphase decomposition, the subfilters of the first section can be operated at the lower rate. The magnitude response is improved by using cosine prefilters which can also be moved to a lower rate. The sharpening technique is applied to all but the first comb section. The resulting structure is multiplier-free, does not have any filtering at the high input rate, and the magnitude response has a low passband droop and high stopband attenuation. 1
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efficient multistage comb modified rotated sinc rs decimator
European Signal Processing Conference, 2004Co-Authors: G Jovanovicdolecek, S K MitraAbstract:This paper presents a new multistage comb-rotated sinc (RS) decimator. The proposed structure consists of different cascaded comb sections, each down-sampled by a specific down-sampling Factor. The number of sections depends on the Decimation Factor of the original comb decimator. The first section is realized in a non-recursive form. Using the polyphase decomposition, the sub-filters of the first section can be operated at lower rate which depends on the down-sampling Factor of the first section. Additionally, the rotated sinc (RS) filter is cascaded in the second section, thus permitting both multipliers of the RS filter to work at the lower rate. The magnitude response of the proposed structure is better than that of the original comb decimator.
G Jovanovicdolecek - One of the best experts on this subject based on the ideXlab platform.
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efficient multistage comb modified rotated sinc rs decimator
European Signal Processing Conference, 2004Co-Authors: G Jovanovicdolecek, S K MitraAbstract:This paper presents a new multistage comb-rotated sinc (RS) decimator. The proposed structure consists of different cascaded comb sections, each down-sampled by a specific down-sampling Factor. The number of sections depends on the Decimation Factor of the original comb decimator. The first section is realized in a non-recursive form. Using the polyphase decomposition, the sub-filters of the first section can be operated at lower rate which depends on the down-sampling Factor of the first section. Additionally, the rotated sinc (RS) filter is cascaded in the second section, thus permitting both multipliers of the RS filter to work at the lower rate. The magnitude response of the proposed structure is better than that of the original comb decimator.
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efficient sharpening of cic Decimation filter
International Conference on Acoustics Speech and Signal Processing, 2003Co-Authors: G Jovanovicdolecek, S K MitralAbstract:We propose an efficient sharpening of a CIC Decimation filter for an even Decimation Factor. The proposed structure consists of two main sections: a section composed of a cascade of the first-order moving average filters, and a sharpening filter section. The proposed decomposition scheme allows a sharpening section to operate at half of the input rate. In addition, the sharpened CIC filter is of length that is half of that of the original CIC filter. With the aid of the polyphase decomposition, the polyphase subfilters of the first section can also be operated at the half of the input rate.
Gerardo Molina Salgado - One of the best experts on this subject based on the ideXlab platform.
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Low power two-stage comb Decimation structures for high Decimation Factors
Analog Integrated Circuits and Signal Processing, 2016Co-Authors: Gerardo Molina Salgado, Gordana Jovanovic Dolecek, Jose M De La RosaAbstract:This paper presents power and area analysis of two-stage comb-based Decimation structures for high Decimation Factors. The first stage is either in a recursive form cascaded-integrator-comb (CIC) or in a non-recursive form, while the second stage is in a recursive form. The proposed structures are compared with a single CIC structure. We demonstrated how to choose the Decimation Factor of the first stage in order to get simultaneously the highest possible power reduction and the lowest possible area increase, in a comparison with a single CIC structure. Additionally, the modified two-stage structure with an increased attenuation and a reduced power consumption is presented. Analysis is supported by MATLAB simulations and validated by the VHDL implementations.
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modified comb decimator for high power of two Decimation Factors
Latin American Symposium on Circuits and Systems, 2014Co-Authors: Gerardo Molina Salgado, Gordana Jovanovic Dolecek, Jose M De La RosaAbstract:This paper presents a modified two-stage comb Decimation structure for Sigma-Delta Analog-to-Digital Converters (ADC) with high Decimation Factor, which can be implemented as a power of two. The proposed structure exhibits a decreased passband droop, as well as increased attenuations in the folding bands compared with the power and area efficient structures recently proposed in the literature. This is achieved by introducing a simple corrector filter at second CIC (Cascaded-Integrator-Comb) stage, such that it works at the rate, which is less than the high input rate by half of the Decimation Factor. The corrector filters depend only on the number of the cascaded equivalent combs. In that way the same corrector can be used for the comb decimator with different Decimation Factors but with the equal number of the cascaded combs. The comparison with the power and area efficient comb-based structures from literature, and the VHDL implementation, confirm the efficiency of the proposed structure.
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on efficient non recursive comb decimator structure for m 3 n
International Conference on Communications, 2012Co-Authors: Gordana Jovanovic Dolecek, Gerardo Molina SalgadoAbstract:This paper presents an efficient comb non-recursive structure in which the Decimation Factor can be represented as a power of three. The proposed structure can be used for two different design goals: an improvement of the first folding band attenuation, and a decrease of the power consumption while keeping the desired minimum attenuations in all folding bands. The method is illustrated with two examples which are implemented in CMOS technology 0.18µm.
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low power non recursive comb based Decimation filter design
International Symposium on Communications Control and Signal Processing, 2012Co-Authors: Gerardo Molina SalgadoAbstract:This paper presents a novel low power non-recursive comb Decimation filter, in which a Decimation Factor M is a power of two. The design goal was to decrease a power consumption of a traditional non-recursive structure, while satisfying the desired minimum aliasing attenuation in all folding bands. The implementation analysis and comparisons with the traditional non-recursive structure in terms of a power consumption and area are provided.
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non recursive comb Decimation filter with an improved alias rejection
Latin American Symposium on Circuits and Systems, 2012Co-Authors: Gerardo Molina SalgadoAbstract:This paper presents a novel comb-based non-recursive Decimation filter, in which the Decimation Factor M is a power of two. The goal was to improve the aliasing rejection in the first folding band as an expense of a slight modification of a traditional non-recursive structure. The implementation analysis and the comparisons with the traditional non-recursive structure, in terms of power consumption and area, are provided.
Habib Mehrez - One of the best experts on this subject based on the ideXlab platform.
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Low power Comb Decimation Filter Using Polyphase Decomposition For Mono-Bit ¢ ¡ Analog-to-Digital Converters Abstract
2008Co-Authors: Yannick Dumonteix, Hassan Aboushady, Habib Mehrez, M. M. LouëratAbstract:A power efficient multirate multistage Comb Decimation filter for monobit £¥ ¤ A/D converters is presented. Polyphase decomposition in all stages with high Decimation Factor in the first stage, are used to reduce the frequency of the input signal. Several implementations have shown that proper choice of the Decimation Factor of the first stage can reduce power consumption by more than 30 % The multistage architecture makes the total Decimation Factor easily programmable and suitabale for multi-standard applications.
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efficient polyphase decomposition of comb Decimation filters in spl sigma spl utri analog to digital converters
IEEE Transactions on Circuits and Systems Ii: Analog and Digital Signal Processing, 2001Co-Authors: Hassan Aboushady, Yannick Dumonteix, M. M. Louërat, Habib MehrezAbstract:A power efficient multirate multistage Comb Decimation filter for mono-bit and multi-bit /spl Sigma//spl utri/ A/D converters is presented. Polyphase decomposition in all stages, with high Decimation Factor in the first stage, is used to significantly reduce the sampling frequency of the Comb filter. Several implementations indicate that proper choice of the first stage Decimation Factor can considerably improve power consumption, area and maximum sampling frequency. In multibit /spl Sigma//spl utri/ A/Ds, this optimum first stage Decimation Factor is a function of the input wordlength.
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Low-power Comb Decimation Filter Using Polyphase Decomposition For Mono-bit Sigma-Delta Analog-to-Digital Converters
2000Co-Authors: Yannick Dumonteix, Hassan Aboushady, Habib Mehrez, Marie-minerve Rosset-louëratAbstract:A power efficient multirate multistage Comb Decimation filter for monobit Σ∆ A/D converters is presented. Polyphase decomposition in all stages with high Decimation Factor in the first stage, are used to reduce the frequency of the input signal. Several implementations have shown that proper choice of the Decimation Factor of the first stage can reduce power consumption by more than 30% The multistage architecture makes the total Decimation Factor easily programmable and suitabale for multi-standard applications.
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efficient polyphase decomposition of comb Decimation filters in spl sigma spl delta analog to digital converters
Midwest Symposium on Circuits and Systems, 2000Co-Authors: Hassan Aboushady, Yannick Dumonteix, M. M. Louërat, Habib MehrezAbstract:A power efficient multi-rate multi-stage Comb Decimation filter for mono-bit and multi-bit /spl Sigma//spl Delta/ A/D converters is presented. Polyphase decomposition in all stages, with high Decimation Factor in the first stage, is used to significantly reduce the sampling frequency of the Comb filter. Several implementations indicate that proper choice of the first stage Decimation Factor can considerably improve power consumption, area and maximum sampling frequency. In multibit /spl Sigma//spl Delta/ A/Ds, this optimum first stage Decimation Factor is function of the input wordlength.
