Cic compensation filter. By employing polyphase decomposition, which is an efficient parallel processing technique, the power consumption of the CIC filter realization is significantly reduced at the cost of increased area. 2008; A simple second-order sine-based CIC (cascaded-integrator-comb) compensator is presented. 2180093 Corpus ID: 22932270; Maximally Flat CIC Compensation Filter: Design and Multiplierless Implementation @article{FernndezVzquez2012MaximallyFC, title={Maximally Flat CIC Compensation Filter: Design and Multiplierless Implementation}, author={Alfonso Fern{\'a}ndez-V{\'a}zquez and Gordana Jovanovic-Dolecek}, journal={IEEE A simple decimation filter based on the CIC filter and a sine compensator is presented. 3, the CIC roll-off compensation is focused on compensation of the frequency This paper presents a new design method to improve the performance of CIC filter. In the proposed filter design, the CIC filters are an optimized class of linear phase FIR filters composed of a comb part and an integrator part. In SRC, Comb-Integrator-Comb (CIC) filter plays an important role. Related papers. Compensation Filter CIC Compensation filter Design ,When the number of stages is large, the CIC filter frequency response does not have a wide flat pass band . Signal Process. The phase of the filter is The CIC filter has an input with sample rate of 10 MHz and the output of the CIC has the sample rate of 500 kHz (e. Electron. Design of wideband CIC compensator filter for a digital IF receiver. With the dotted curve representing the uncompensated passband droop of a 1st-order R = 8 CIC filter, Design of an Efficient Retimed CIC Compensation Filter Vishal Awasthi, Krishna Raj H. The first stage can be Figure 3 shows the frequency response of the CIC filter, the CIC roll-off compensation filter, and after using the CIC roll-off compensation filter, respectively, when the decimation rate and output data rate are set to 11 and 2 times, respectively. Specify the number of sections of the CIC filter being compensated as The CIC filter was first introduced by Hogenauer , V. About. 1016/j. pi*(fin/fs)*N) # Define the "b" and "a" polynomials to create a CIC filter 11. J. To compensate for the passband attenuation of CIC, the • Re‐arranging to CIC filter • Nth Order CIC filter • Implementation • Frequency Response of the CIC filter. The decimation filters also reject out-of-band noise. My Tools ? Sign Out. m to generate fixed point compensation FIR filter coefficients as a Verilog include file. 25% multiplications per input sample (MPIS) and 23. Choi, “Design of CIC roll-off compensation filter in a W-CDMA digital receiver”, Journal of Digital Signal Processing, vol. It is far from generic. So it truncated respectively to 25, 22, 20, 18 and 16 bit in each adder, left to right Notice that each 4-bit adder provides a group Propagate and Generate Signal, which is used by the MCLA Logic block. harris / Digital Signal Processing 19 (2009) 827–837 Table 2 ACFpolynomials. I. The The CIC filter was first introduced by Hogenauer , V. 846–854, 2006 [14] • Re‐arranging to CIC filter • Nth Order CIC filter • Implementation • Frequency Response of the CIC filter. It's droop hardly worth mentioning. 63%, 91. High gain in the pass-band renders these filters unsuitable for hardware implementation. 25% This paper presents the multiplierless CIC compensation filter based on the 2M-order filter and the sharpening technique. The requirement for signal phase accuracy is high. CIC filters have two drawbacks: The CIC Intel® FPGA IP implements a cascaded integrator-comb (CIC) filter with data ports that are compatible with the Avalon® streaming interface. This page describes how to design CIC compensation filters using open-source tools. Related Links • Introduction to Altera IP Cores Provides general 3 Design and Implementation of Multi-level CIC Filter Based on FPGA The CIC filter consists of two modules, integrator and comb, which are composed of the multiplexing selector, adder and shift register. Magnitude responses of the CIC, compensated CIC, and compensation filters in Example 1. 25% DOI: 10. The maximum number of bit is 25 and it is decreased in next stages. Int. 2b presents a spectral zoom to the main lobe of the CIC’s spectral response. Recall the standard D-point moving-average process in Figure 2a. 44 19 1162-1163 2008. Energ. Saravanan, Design and implementation of efficient CIC filter structure for decimation. CIC filters have two drawbacks: Understanding CIC Compensation Filters. The design parameter is the integer b, which depends on the number K of the cascaded CIC filters. m n H0 1 0 2H − H2 1 1 3H2 CIC compensation decimators are multirate FIR filters that you cascade with CIC decimators to mitigate the drawbacks of the CIC filters. Example 1: Consider the following design parameters: the decimator factor D is equal to 32, the number of area and power consumption. Jovanovic Dolecek A. The ne w parameter Fo was e resulting structure is multiplier less and To overcome the magnitude droop. CIC compensation decimators are multirate FIR filters that you cascade with CIC decimators to mitigate the drawbacks of the CIC filters. I have the following compensation filter requirements Understanding CIC Compensation Filters Introduction The cascaded integrator-com b (CIC) filter is a class of hardware-efficient linear phase finite impulse response (FIR) digital filters. In particular, we consider second- and fourth-order This paper presents theory and methods for designing CIC compensating filters, the simulation analyzes the advantages and disadvantages of each method, and suggestions This paper presents the multiplierless CIC compensation filter based on the 2M-order filter and the sharpening technique. Readme Activity. The goal is twofold: to avoid the integrator section at high input rate and obtain a low wideband passband droop of the overall filter. and Jovanovic Dolecek G. CIC interpolation filters are a class of linear phase finite impulse response (FIR) filters consisting of a comb part and an integrator part. In a more efficient implementation, the single rate CIC In this paper, we proposed an efficient compensated cascade Integrator comb (CIC) decimation filter structure that analyze the consequence of filter order variation which has a retimed FIR filter CIC compensation decimators are multirate FIR filters that you cascade with CIC decimators to mitigate the drawbacks of the CIC filters. After the CIC filter cascaded the compensation filter which has inversed magnitude response to CIC filter was proposed, which improved the pass band and the transition band features of the CIC filter and improved the performance of CIC filter. 8(9), 1468–1474 (2014) Google Scholar P. We now examine an example of the use of the Hogenauer (resampled CIC) filter. 2009, Digital Signal Processing. CIC filters achieve sampling rate decrease (decimation) and sampling rate increase (i nterpolation) without using multipliers. The analysis of delay and The CIC decimation filter decreases the sample rate of an input signal by an integer factor using a cascaded integrator-comb (CIC) filter. These filters are of the CIC filter is M and stage of it is N. DSP Builder ready. 484 MHz while maintaining the input signals spectrum information. arange(0,21e3,1) # Create a This paper presents a simple multiplier less CIC compensation filter based on the sharpening technique. This technique proposed by Kaiser and Hamming attempts to improve the pass band and the stop band of a symmetric nonrecursive filter using the multiple copies of the same filter. Easy-to-use MegaWizard™ interface for parameterization and hardware generation. CICDecimator(DecimationFactor = 20, Specify the rate-change factor of the CIC filter being compensated as a positive integer scalar. CIC interpolation filters are used in areas that In this paper, a design of a CIC filter by using a signed digit (SD) number system-based compensation filter has been proposed and analyzed. Stepped triangular CIC decimation filter for SDR applications. Commun. 6 Bits CIC filters use only adders and registers; they require no multipliers to handle large rate changes. Implementation structure of the two-stage factor of 10 decimator Specify the rate-change factor of the CIC filter being compensated as a positive integer scalar. Dolecek and Fernando Javier Trejo Torres, “ Compensated CIC-Cosine Decimation Filter “, ECTI Transactions on Computer and Information Technology, Vol. CIC filters have two drawbacks: sampling, the compensation filter follows the CIC filter and for up sampling systems, the compensation FIR filter is placed before a CIC filter. This problem can be alleviated by a compensation filter [7], [8], [9]. — In many communication and signal processing systems, it is highly desirable to implement an efficient narrow-band filter that decimate or interpolate the In addition, CIC filters often need a compensation filter as the next stage to compensate for its passband droop, which is power and area demanding. K. 5 forks Report repository Releases No This paper presents the multiplierless CIC compensation filter based on the 2M-order filter and the sharpening technique. 3. ( ) (1) 1 1 1 [ ] [ ] . The transfer function of it is given below: ( ) ∑ ( ) For a CIC decimator compensation filter operates at the . Response of uncompensated CIC filter is denoted as M = 1. 5. 6 Bits C implementation of the CIC filter for decimation and interpolation. FIR filter respectively. Sign In My Intel. The simple multiplierless compensator with only one parameter depending on the number of the stages of the CIC filter has been proposed in [7]. Automate any workflow Codespaces. An important application area for For a CIC decimator compensation filter operates at the . The amplitude-frequency response of the proposed method is compared with other proposals in recent literature, and the comparison shows that the The CIC Decimator block decimates an input signal by using a cascaded integrator-comb (CIC) decimation filter. This technique proposed by Kaiser and Hamming attempts to improve the pass band and the stop band of a symmetric nonrecursive filter using the multiple copies of the same filter. R Vaishnavi et al. 1109/TCSII. Polynomial based Design of CIC Compensation Filter used in Software Defined Radio for Multirate Signal Processing. Eng. See full PDF download Download PDF. Google Scholar. Specify the number of sections of the CIC filter being compensated as This paper presents a simple multiplier less CIC compensation filter based on the sharpening technique. The proposed compensators have the minimum phase The filter is convenient for multi-rate since it is very simple in structure and will have nulls at all the frequency centers where aliasing (decimation) and images (interpolation) occurs, at the expense of a "passband" droop that can be easily compensated for. Fernandez-Vazquez A. CIC filters have two drawbacks: FERNANDEZ-VAZQUEZ AND DOLECEK: CIC COMPENSATION FILTER: DESIGN AND IMPLEMENTATION 115 Fig. Corpus ID: 18848916; Efficient You can compensate for the shortcomings of a CIC decimator, namely its passband droop and wide transition region, by following it with a compensation decimator. 1 MHz sampled at 105 MHz x_in=np. The decimation factor of the CIC filter is M and CIC compensator filter demonstrated that by using compensation with CIC filter improve the frequency response in passed of interest 26. Kim, W. : Unwanted side effects because of spectral aliasing and spectral imaging during signal The cascading of these two filters generated a sixth order CIC compensation filter that reduced considerably the passband drop of CIC filters. 003 Corpus ID: 33336653; Design of CIC roll-off compensation filter in a W-CDMA digital IF receiver @article{Kim2006DesignOC, title={Design of CIC roll-off compensation filter in a W-CDMA digital IF receiver}, author={Seong Ihl Kim and Weon-Cheol Lee and Sungsoo Ahn and Seungwon Choi}, journal={Digit. 57 MHz. Hardware efficient compensated CIC filter over a narrow band frequency that increases the speed of down sampling by using multiplierless decimation filters with polyphase FIR filter structure is presented. CIC FILTER CONSTRAINTS & CHIP DESIGN A. The firwin2 function scipy can calculate FIR filter taps from an array of attenuation vs normalised frequency. The Expand. V. 1e6 N=np. I have the following compensation filter requirements Thus, the proposed CIC compensation filter structure based on a signed digit number system is an efficient method to speed up the filter operation with low power consumption and improved magnitude characteristic. The The design of the simplest compensation filters available for cascaded integrator-comb (CIC) decimators to date is introducted. II: Express Brief 56 5 409-413 2009. Its output bus utilization CIC filters are an optimized class of linear phase FIR filters composed of a comb part and an integrator part. Dolecek, f. Floating point and fixed point compensation filter The CIC Compensation Decimator block uses an FIR polyphase decimator as the compensation filter. G. In other words, the compensation filter always This paper presents the compensation filter design for the two-stage CIC decimation filter. Description. area and power consumption. Fernández-Vázquez. Fred Harris. CIC filters (also known as Hogenauer filters) are computationally efficient for extracting baseband signals from narrow-band sources using decimation. The CIC interpolation filter structure consists of N sections of cascaded comb filters, followed by a rate change by a factor of R, followed by N sections of cascaded integrators. CIC filters are a class of linear phase finite impulse response (FIR) filters consisting of a comb part and an integrator part. The CIC filter has an input with sample rate of 10 MHz and the output of the CIC has the sample rate of 500 kHz (e. 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 It is that easy! The filter is a simple 3 tap FIR with coefficients [$(-\alpha/2)$ $(1+\alpha)$ $(-\alpha/2)$]. The example is part of a modulator that shapes and up samples in a polyphase filter and then interpolates to a higher output sample rate with a CIC filter. 830 G. Google The method for a design of a multiplierless CIC compensation filter that compensates the CIC passband droop in the pass band region defined by the passband frequencyco ωp=π/2M is presented. Using the polyphase decomposition the filter can be moved to a lower rate, which is D times less than the high input rate, where D is the decimation factor. General Description CIC filters (also known as Hogenauer filters) are computationally efficient for The CIC and FIR filters convert in-phase and quadrature signals sample rate to 11. Ahn, and S. G (z M) = G c K Generally, to compensate a CIC filter the inverse of the CIC filters response can be used to generate the compensation filter. That filter has . Nevertheless, let say i have some droop in the passband , like the below figure, The compensation FIR filter's frequency magnitude response is ideally an inverted version of the CIC filter passband response similar to that shown by the dashed curve in Figure 11a for a simple three-tap FIR filter whose coefficients are [-1/16, 9/8, -1/16]. Pass band ripple and decimation ratio . Electr. Raj, Application of hardware efficient CIC compensation filter in narrow band filtering. and Mitra S. This is the code: import numpy as np import matplotlib. One benefit of the . J. CIC roll-off compensation filter The CIC roll-off compensation filter is convolved with the channel selection filter. Some recent research works have shown that cascading a A moving average filter is probably one of the most common filters in digital signal processing: it’s super simple to understand and implement, they are symmetric, so they have CIC compensation interpolators are multirate FIR filters that you cascade with CIC interpolators to mitigate the drawbacks of the CIC filters. Using a multirate identity this filter can be moved to a low rate thus becoming a second order filter. Compared with the recent wide-band compensators introduced in Therefore, a CIC compensation filter is necessary to address and compensate for the passband attenuation. 25 Msps. The digital decimation filter is an important part of the Sigma-Delta ADC and is designed to make the Sigma-Delta ADC (Analog-to-Digital Converter) meets the requirements of Signal-to-Noise Ratio (SNR) not less than 120 dB and Equivalent Number of Thus, the proposed CIC compensation filter structure based on a signed digit number system is an efficient method to speed up the filter operation with low power consumption and improved magnitude performance of CIC filter we can use many techniques, such as compensation filter cascaded with CIC filter, Sharpening technique proposed by Kaiser and Hamming, polyphase decimation FIR filter to achieve wide broadband compensation of the CIC filter. Romero DET and Jimenez MGC Efficient wide-band droop compensation for CIC filters: Ad-hoc and reconfigurable fir architectures Electron. 16, pp. Lee, S. Unfortunately, the magnitude response of the CIC filter exhibits a droop over the passband, which increases when N increases, i. 2. Toggle Navigation. 8-14, May 2010 [13] S. 42% of 3, 6, 8, 12 and 24 order filter respectively than the non-retimed CIC compensation filter. Navigation Menu Toggle navigation. A compensator is separated into two stages and separately inserted into the CIC filter. CIC compensator filter demonstrated that by using compensation with CIC filter improve the frequency response in passed of interest 26. Digital Library . 4. Specify the number of sections of the CIC filter being compensated as The traditional CIC filter has a simple structure, small resources usage, fast speed, but doesn't perform well in the pass band and stop band, limiting its flexibility in the use of Software Defined Radio. While using more efficient solution of using an expander and additional filter to obtain the desired frequency band of interest. We proposed the architecture for the implementation of phase compensator in Cascaded Integrator-Comp (CIC) Filter. This paper presents the efficient modification in the frequency response of CIC compensation filter. But the cascaded-integrator-comb (CIC) filter requires neither multiplier nor coefficient storage, therefore they are widely used in decimation filters. Specify the number of sections of the CIC filter being compensated as Novel finite impulse response architectures for wide passband droop compensation of cascaded integrator-comb filters are presented. 2. The decimation factor of the CIC filter A simple second-order sine-based CIC (cascaded-integrator-comb) compensator is presented. Users can edit the script to specify downsampling factor, CIC filter order, compensation filter length, and other crucial parameters. However they require more taps to achieve a desired response. Control of both instruments was performed with Python using Ethernet connections. This paper presents a new design method to improve the performance of CIC filter. CIC compensation filter design. English. Recursive Running Sum Filter CIC filters originate from the notion of a recursive running sum filter, which is itself an efficient form of a nonrecursive moving averager. Section 2 describes the details of the literature review. Some optimal hardware architectures of the compensation filter are presented in [ 7 - Download Citation | Design of CIC roll-off compensation filter in a W-CDMA digital IF receiver | In a digital intermediate frequency (IF) receiver, decimation is performed to reduce the CIC compensator filter demonstrated that by using compensation with CIC filter improve the frequency response in passed of interest 26. Recall the standard D- This paper presents a new design method to improve the performance of CIC filter. Altera’s CIC Compiler MegaCore® function implements various CIC [12] G. Dolecek S. To compensate for the shortcomings of DOI: 10. This droop is particularly undesirable in the wide-band scenario, and thus the improvement of the passband magnitude characteristic of CIC filters for this case has been The CIC Compensation Decimator block uses an FIR polyphase decimator as the compensation filter. 5 CIC Interpolator Example . A FIR filter that has a magnitude response inverse of the CIC filter can be applied to achieve frequency response correction. ≈ sinc −1 Mf N (5) Figure1: Cascaded structure of CIC and Compensation filter In DDR the compensation filter always follows the CIC filter [31]. Conference Paper. Wideband CIC compensation . Finally the simulation result shows that the compensating filter could improve the inherent Implementation of CIC filter for DUC/DDC R Vaishnavi#1, V Elamaran#2 #1Department of Electronics and Communication Engineering output function, this could be compensated with analog function compensation filter. 56% and 94. Select Your Language Bahasa Indonesia Deutsch English CIC interpolation filters are a class of linear phase finite impulse response (FIR) filters consisting of a comb part and an integrator part. Therefore, the CIC output bus utilization is 50 percent. CIC decimation filters are a class of linear phase finite impulse response (FIR) filters consisting of a comb part and an integrator part. The CIC decimation filter structure consists of N sections of cascaded integrators, a rate change factor of R, and N sections of Consequently the wide-band Chebyshev sharpened CIC with compensation filter in Ref. dsp. The CIC interpolation filter structure consists of N sections of cascaded comb filters, a rate change factor of R , and N sections of cascaded integrators. The design parameters are the number K of cascaded CIC filters and the parameter b defining the coefficient of the compensator filter. CICInterpolator System object™ interpolates an input signal by using a cascaded integrator-comb (CIC) interpolation filter. Google Scholar . After discussing the techniques we give the review analysis on improving method of CIC filter design. No, what you describe wouldn't be the case: the whole point of the CIC is that you get an extremely efficient filter that you use to decimate as far as feasible, and then in the very last step when your sampling rate is already low, you use a last Understanding CIC Compensation Filters Introduction The cascaded integrator-com b (CIC) filter is a class of hardware-efficient linear phase finite impulse response (FIR) digital filters. 3. Semantic Scholar's Logo. Instant dev environments CIC-cosine decimation filter from [10]. 27 presents an example in which the shaping is performed by a 1-to-5 polyphase filter and the The CIC filter has an input with sample rate of 10 MHz and the output of the CIC has the sample rate of 500 kHz (e. Second-order compensation filter structure. The comparison has been done with that of the compensation done by the fourth order compensation filter. CIC decimation filters are used in areas that require high decimation. The first stage can be Magnitude responses of CIC filter with N = 7 and R = 2048 compensated with compensators having M = 3, 5, 7, and 17 coefficients. The dsp. Expand. I have the following compensation filter requirements And this property is why CIC filters are so attractive xin decimating 1and interpolating DSP systems. These filters require only two additions and can be straightforwardly realised in terms of the The compensation FIR filter's frequency magnitude response is ideally an inverted version of the CIC filter passband response similar to that shown by the dashed curve in Figure 11a for a simple three-tap FIR filter whose coefficients are [-1/16, 9/8, -1/16]. The CIC data path undergoes internal register growth that is a function of all the design The CIC Compensation Interpolator block uses an FIR polyphase interpolator as the compensation filter. They also construct narrow-band signals from After the CIC filter cascaded the compensation filter which has | Find, read and cite all the research you need on ResearchGate. Download Citation | Analysis and design of CIC compensation filter | The traditional CIC filter has a simple structure, small resources usage, fast speed, but doesn't perform well in the pass band This paper presents the efficient modification in the frequency response of CIC compensation filter and describes a mode composed of integrator comb pairs, and it is based on a floating point mathematical algorithm. when a higher attenuation is specified for aliasing rejection. These filters are popular in ASICs and Specify the rate-change factor of the CIC filter being compensated as a positive integer scalar. These filters are Description. This System object™ lets you design and use such a filter. Stars. , 10 MHz/20). This technique proposed by Kaiser and Hamming attempts to improve the pass Understanding CIC Compensation Filters Introduction The cascaded integrator-com b (CIC) filter is a class of hardware-efficient linear phase finite impulse response (FIR) digital filters. 4% additions per input sample (APIS) w. To enhance the passband characteristics of We present here a new design of wideband compensators for sharpened cascaded-integrator-comb (CIC) filters. The decimation factor of the CIC filter is M and The CIC and FIR filters convert in-phase and quadrature signals sample rate to 11. [13] has a gain of 337. 74 dB is observed in case of [14]. IP functional simulation models for use in Altera-supported VHDL and Verilog HDL simulators. Crossref. g. rest of the paper is organized as follows. The CIC decimation filter decreases the sample rate of an input signal by an integer factor using a cascaded integrator The CIC filter has an input with sample rate of 10 MHz and the output of the CIC has the sample rate of 500 kHz (e. The group Propagate P G and Generate G G of a 4-bit adder This paper introduces the efficient second order IIR filter which considerably improves the passband as well as the stopband of the Cascaded-Integrator-Comb (CIC) filter. Over‐Sampling and Averaging • Increases Bit resolution • Increasing N bits out requires 2^N samples • Increasing Effective Number of Bits(ENOB) – Fos=Fout*2^(2n) => n=log 4 (Fos/Fout)=log 4 (D) • For 50MHz sampling and 16kHz output – Fos/Fout = 3125 – 11. This technique proposed by Kaiser and Hamming To compensate for this fall off in the passband, and to try to reduce the width of the transition region, you can use a CIC compensator filter that demonstrates an (x/sinx) profile in the CIC compensation filters are often implemented as FIR filters. The design parameter is the Description. Mitra. They also construct narrow-band signals from This paper presents a simple multiplier less CIC compensation filter based on the sharpening technique. Google Scholar [26] Xu L, Yang W, and Tian H Design of wideband CIC compensator based on particle swarm optimization Circuits Syst. Search. In both approaches, the design In order to solve the problem which the pass band tolerance of the CIC filter is large and the stop band is small in the digital receiver, the paper uses the ISOP filters to compensate it after the analysis about the transfer function of the traditional CIC filter and its spectral characteristics. To this end the decimation is split into two stages with the cascaded less order RRS filters at each stage. Therefore, CIC is a suitable and economical filter architecture for hardware implementation, and is widely used in sample rate conversion designs such as digital down converters (DDC) and digital up converters (DUC). , Alm This paper presents the multiplierless CIC compensation filter based on the 2M-order filter and the sharpening technique. The CIC interpolation filter increases the sample rate of an input signal by an integer factor using a cascaded integrator The disadvantage of a CIC filter is that its passband is not flat, which is undesirable in many applications. It consists of seven independent 24-bit, 3 rd order Delta-Sigma Modulators for current, voltage channels and Digital Signal Processor. In the first design, magnitude response is a product of sinusoidal functions, while in the second design, it is a sum of sinusoidal functions. This can be Broadly, sharpening techniques or compensation filters improve the overall frequency response of the filter. Published in: 2015 IEEE CIC compensator filter demonstrated that by using compensation with CIC filter improve the frequency response in passed of interest 26. In other words, the compensation CIC compensation decimators are multirate FIR filters that you cascade with CIC decimators to mitigate the drawbacks of the CIC filters. An economical class of digital filters for CIC filter outputs interleaved multi-channel data, where startofpacket and endofpacket signals indicate the corresponding channel boundary. C. [5] CIC filter is a very simple digital filter, which is also the Finite Impulse Response (FIR). In other words, the compensation The compensation FIR filter's frequency magnitude response is ideally an inverted version of the CIC filter passband response similar to that shown by the dashed curve in Figure 11a for a simple three-tap FIR filter whose coefficients are [-1/16, 9/8, -1/16]. Specify the number of sections of the CIC filter being compensated as I'm new with Python and I'm completely stuck when filtering a signal. In (Jovanovic Dolecek, 2009) a novel decimation filter () (),M K 1 M Gz G z c (13) is proposed, $\begingroup$ hey, your absolute frequencies mean nothing to me, because you haven't told us your sampling rate so far. In (Jovanovic Dolecek, 2009) a novel decimation filter . Run cic. Using an appropriate FIR filter in series after the CIC decimation filter can compensate for the induced droop. We turn now our attention to the wideband compensators satisfying the desirable characteristics previously mentioned. download The script plots the frequency response of the filter, as well as the response of a matching FIR compensation filter (designed using fir2()). It will need significant modification if you have a different situation. D. The Octave script is also attached. Our overall filter has a decimation ratio of 48, and thus 9 possible CIC decimation ratios: 2, 3, 4, 6, 8, 12, 16, 24, 48. Kim S. For details, see Algorithms. The CIC filter is in blue. Engineering. In other words, the compensation filter always The CIC Intel® FPGA IP implements a cascaded integrator-comb (CIC) filter with data ports that are compatible with the Avalon® streaming interface. With that said, let's see how CIC filters operate. There we see that D-1 summations (plus one multiply by 1/D) are necessary to compute the CIC compensation interpolators are multirate FIR filters that you cascade with CIC interpolators to mitigate the drawbacks of the CIC filters. sin(2*np. I have the following compensation filter requirements Simple method for compensation of CIC decimation filter. The CIC filter first performs the averaging operation then follows it with the decimation. With the dotted curve representing the uncompensated passband droop of a 1st-order R = 8 CIC filter, The passband characteristics of the compensator, along with that of the compensated CIC and the CIC filters, are shown in Fig. Published in: 2015 IEEE Lets say i have a LPF response that has some kind of droop (some attenaution in the passband, usually could be due to cic filter how to make CIC compensation filter,,,, or can also be due to large ripple in passband). 2017 53 4 228-229. Index Terms—Cascaded-Integrator-Comb (CIC) filters, sam-pling rate conversion, decimation, linear programming. Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64. 25% A simple design for wideband compensation of a cascaded-integrator-comb (CIC) decimation filter is presented. The proposed filter provides the narrowband compensation, as well as the wideband compensation in the band which is 3/4 of the overall band after decimation. CIC filter constraints CIC decimator filter have the following two constraints: The word lengths of the filter stages must be no Magnitude responses of CIC filter with N = 7 and R = 2048 compensated with compensators having M = 3, 5, 7, and 17 coefficients. Multistage CIC The CIC Compensation Interpolator block uses an FIR polyphase interpolator as the compensation filter. CICNumSections — Number of sections of the CIC filter being compensated 2 (default) | positive integer scalar. richa singh. Comput. INTRODUCTION Cascaded-integrator-comb (CIC) filters are utilized in many applications that require efficient sampling rate conversion. Download scientific diagram | CIC filter, compensation filter, and overall frequency response from publication: Performance analysis of multi-rate signal processing digital filters on FPGA | Multi The passband characteristics of the compensator, along with that of the compensated CIC and the CIC filters, are shown in Fig. These filters are G f = MR ≈ πMf sin (πMf ) Sin (πf/R) sin πMf N (3) (4) In case of large R, the compensation filter response can be approximated by the inverse sinc function. Let the coefficients of the compensation filter It adopts a three-stages cascaded structure including a Cascaded Integrator Comb (CIC) decimation filter, a Finite Impulse Response (FIR) compensation filter, and a half-band (HB) filter. 2 Wideband CIC compensation We turn now our attention to the wideband compensators satisfying the desirable characteristics previously mentioned. Multistage CIC Abstract: Power Meters are widely used. (For details on a simple 3-tap CIC compensator, see how to make CIC compensation filter) Description. Various methods happen to be introduced to reduce the power consumption as well as to enhance the circuit speed in multirate filtering, which utilizes the non - recursive structure of a FIR vs IIR CIC Compensation Filters – A Comparison. The proposed filter provides the narrowband compensation, as well as the wideband droop compensation filter, which is typically required for the conventional systems. The figure shows the folding frequency at the. For well defined rate change systems, the narrow We used an Agilent 33220A arbitrary waveform generator to characterize the frequency response of the compensated CIC filter we implemented on the Red Pitaya. The proposed filter performs compensation efficiently using only three additions/subtractions. This The method for a design of a multiplierless CIC compensation filter is presented. This droop is particularly undesirable in the wide-band scenario, and thus the improvement of the passband magnitude characteristic of CIC filters for this case has been Compensation filter coefficients generation. 25% This paper presents a digital decimation filter based on a third-order four-bit Sigma-Delta modulator. General Description CIC filters (also known as Hogenauer filters) are computationally efficient for After the CIC filter cascaded the compensation filter which has inversed magnitude response to CIC filter was proposed, which improved the pass band and the transition band features of the CIC CIC compensation interpolators are multirate FIR filters that you cascade with CIC interpolators to mitigate the drawbacks of the CIC filters. Symmetric filters You can compensate for the shortcomings of a CIC decimator, namely its passband droop and wide transition region, by following it with a compensation decimator. 86. 4 watching Forks. r. The CIC decimation filter is conceptually given by a single rate CIC filter, H(z) which is a lowpass anti-imaging filter, followed by a downsampler. 2011. Altera’s CIC Compiler MegaCore® function implements various CIC sampling, the compensation filter follows the CIC filter and for up sampling systems, the compensation FIR filter is placed before a CIC filter. These filters are popular in ASICs and FPGAs, since they do not have any multipliers. Thus, the proposed CIC compensation filter structure based on a signed digit number system is an efficient method to speed up the filter operation with low power consumption and improved magnitude characteristic. CICCompensationInterpolator returns a System object, ciccompint, that applies an FIR interpolator to each channel of an input signal. 1. I'm new with Python and I'm completely stuck when filtering a signal. The decimation factor of the CIC filter Abstract: Power Meters are widely used. I have the following compensation filter requirements This paper presents a simple multiplier less CIC compensation filter based on the sharpening technique. pyplot as plt from scipy import signal fs=105e6 fin=70. The CIC decimation filter structure consists of N sections of cascaded integrators, followed by a CIC filters are an optimized class of linear phase FIR filters composed of a comb part and an integrator part. Therefore, the output of this rate conversion system should be noiseless down sampled sinusoidal waves of frequency 4. The CIC decimation filter decreases the sample rate of an input signal by an integer factor using a cascaded integrator CIC Compensation filter Design ,When the number of stages is large, the CIC filter frequency response does not have a wide flat pass band . FIR compensation filters are inherently stable given their lack of feedback, easier to design and test, and introduce no phase distortion. Decimation filter has wide application in both the analog and digital system for CIC filter in this paper has five MCLA in integrator parts. Find and fix vulnerabilities Actions. , Lee W. The CIC filter and CIC compensator filter demonstrated that by using compensation with CIC filter improve the frequency response in passed of interest 26. Because of its simplicity, computational efficiency, flexibility for high-speed data handling, and features such as anti-aliasing, interpolation, and noise reduction, CIC filters play an essential This paper presents a new design method to improve the performance of CIC filter. The Specify the rate-change factor of the CIC filter being compensated as a positive integer scalar. CIC filter constraints CIC decimator filter have the following two constraints: The word lengths of the filter stages must be no This paper proposes an efficient compensator of the cascaded integrator comb filter (CIC filter) to improve the passband droop. / This paper presents implementation of minimax Sharpened Cascaded Integrator Comb (SCIC) decimation filter using polyphase decomposition. As shown in Fig. All parameters are clearly labeled in code comments. arange(0,21e3,1) # Create a input sin signal of 70. Awasthi, and K. Skip To Main Content. Figure 11. The amplitude–frequency response of the CIC filter can be derived from its transfer function, as follows: H (e j ω) = 1 M sin (ω M / 2) sin (ω / 2) K (14) This formula is often referred to as the sinc function. The dsphdl. Using the properties of the object, the interpolation filter can be Description. The default is 2. CICInterpolator System object™ interpolates an input signal using a cascaded integrator-comb (CIC) interpolation filter. As it is difficult to maintain the dynamic range of the signals during ciccompint = dsp. You can use a frequency sampling method to determine the coefficients of a FIR filter that equalizes the undesirable passband droop of the CIC and construct an ideal frequency response. The proposed filter provides the narrowband compensation, as well as the wideband compensation in the band which is frac34 of the overall band after decimation. The proposed filter compensates the CIC passband droop in the passband region defined by the passband frequency ω p =π/2M. The Compensation filter design consist of This paper presents a simple multiplier less CIC compensation filter based on the sharpening technique. 06. Skip to content. A FIR filter follows the CIC filter to provide compensation to CIC filter frequency droop and additional decimation by 2. 12 stars Watchers . Simple method for compensation of CIC decimation filter Electron. The design parameter is the integer b which depends on the number of the cascaded CIC filters. The decimation factor of the CIC filter is M and Figure 2: D-point averaging filters View full-sized image Recursive running-sum filter CIC filters originate from the notion of a recursive running-sum filter, which is itself an efficient form of a nonrecursive moving averager. Sign in Product GitHub Copilot. Due to the use of newer algorithms, compensators designed using this method should In digital signal processing, a cascaded integrator–comb (CIC) is a computationally efficient class of low-pass finite impulse response (FIR) filter that chains N number of integrator and comb Using a CIC Compensation FIR Filter. 57% with the reduction in hardware complexity 12. t. Circuits Syst. 087 dB in the pass-band, while a gain of 142. decimated sample rate. The CIC has a response of (see reference [r2] or [r3]) $$ H(\omega) = \left| \frac{sin(\omega D/2)}{sin(\omega M/2)} \right|^N $$ Where D is the differentiate delay, M is the decimation rate, and N is the filter order (number of cascaded filters). IIR filters have better sharpness for a given order, use fewer multiply-add resources, but need careful This paper presents the compensation filter design for the two-stage CIC decimation filter. 5 Vpp amplitude with 4096 frequencies evenly And this property is why CIC filters are so attractive xin decimating 1and interpolating DSP systems. Write better code with AI Security. [ ] 1 1 K p p K p The proposed sixth order CIC compensation filter is the result of cascade of second order and fourth order compensation filters. Conference Title : ICEP 2014 : International Conference on Electronic Publications Conference Location : performance of the X310's CIC filter and 3 half-band filters, filtering, decimating, and folding-in from the radio's 200 Msps down to 6. The proposed filter performs decimation efficiently using only additions/subtractions making it attractive for software radio (SWR) applications. International Journal of Computer Applications, 2012 . To enhance the passband characteristics of Another structure is proposed which takes advantage of good feature of both the structures and thus have a cascade of CIC and FIR filters which exhibit both the advantage of FIR and CIC filters and hence more efficient over all in terms of hardware and frequency response requirements. e. The design of the simplest compensation filters available for cascaded integrator-comb (CIC) decimators to date is introducted. CICDecimator System object™ decimates an input signal by using a cascaded integrator-comb (CIC) decimation filter. CIC compensation interpolators are multirate FIR filters that you cascade with CIC interpolators to mitigate the drawbacks of the CIC filters. The transfer function was obtained by sending sine waveforms of 0. Since the filter is symmetric, it can also be implemented with just two multipliers as shown in the figure. 2019. CIC interpolation filters are used in areas that require high interpolation. Jovanovic Dolecek G. Skip to search form Skip to main content Skip to account menu. cic_freqresponse. CIC filters have two drawbacks: This paper presents a simple multiplier less CIC compensation filter based on the sharpening technique. Sign In Create Free Account. Fig. Octave/MATLAB code for generating compensation FIR coefficients Resources. Computer Science, Engineering. The CIC interpolation filter is conceptually given by an upsampler followed by a single rate CIC filter, H(z), which is a lowpass anti-imaging filter. 2006. Two different magnitude responses of the compensator are considered. The traditional CIC filter has a simple structure, small resources usage, fast speed, but doesn't perform well in the pass band and stop band, limiting its flexibility in the use of Software Defined Radio. The improvement of design for CIC compensation Compensation filter coefficients generation. 27. The proposed modified compensated CIC-cosine decimation filter is described in section 3, and illustrated with one example. CIC filters achieve sampling rate decrease (decimation) and sampling rate increase (interpolation) without using multipliers. The transfer function of the CIC filter in z-domain is given in equation (4). CIC filters have two drawbacks: Request PDF | Simple method for compensation of CIC decimation filter | A simple second-order sine-based CIC (cascaded-integrator-comb) compensator is presented. The design parameter is the integer b which depends on the number of the cascaded This paper proposed an efficient compensated cascade Integrator comb (CIC) decimation filter structure that has a retimed FIR filter being compensator while using the cutset retiming technique and achieved an improvement in the passband droop and in computation time. These filters are popular in When decimating a narrow-band signal with a cascaded integrator-comb (CIC) filter, which FIR filter is more suitable to compensate the CIC frecuency response? This brief introduces a design and implementation of maximally flat cascaded integrator comb compensation filters. Search 221,738,108 papers from all fields of science. The proposed multiplierless linear phase finite impulse response compensator works at a low sampling rate and requires only three additions/subtractions. CIC filter constraints CIC decimator filter have the following two constraints: The word lengths of the filter stages must be no G f = MR ≈ πMf sin (πMf ) Sin (πf/R) sin πMf N (3) (4) In case of large R, the compensation filter response can be approximated by the inverse sinc function. m generates the frequency response of a CIC filter on the interval of w = -pi:pi. CICDecimator System object™ decimates an input signal using a cascaded integrator-comb (CIC) decimation filter. This paper presents theory and methods for designing CIC compensating filters, the simulation analyzes the advantages and disadvantages of each method, and suggestions on The proposed sixth order CIC compensation filter is the result of cascade of second order and fourth order compensation filters. Software Defined Radio (SDR) supports different wireless standards in a single radio device. Sample rate conversion (SRC) is required for this purpose. model as well as the reachability theory through the valid retiming condition of multirate graphs [9]. The proposed filter provides the narrowband compensation, as well as the wideband filter, the compensated CIC filter, and the desired low-pass band to be protected from the down sampling alias. The structure of the filter is independent of the decimation factor and the number of the cascaded For a CIC decimator compensation filter operates at the . Learn more about cic compensation filter DSP System Toolbox Learn more about cic compensation filter DSP System Toolbox I have a CIC filter as below: Decimation factor: 20 Differential Delay: 1 Number of sections: 4 I created cicDecim object by cicDecim = dsp. Save. The proposed compensation filter reduces the pass-band droop of CIC by considerable amount. 1 , pp. The transfer function of it is given below: ( ) ∑ ( ) Software Defined Radio (SDR) supports different wireless standards in a single radio device. This paper presents theory and methods for designing CIC compensating filters, the simulation analyzes the advantages and disadvantages of each Unfortunately, the magnitude response of the CIC filter exhibits a droop over the passband, which increases when N increases, i. CIC filters have two drawbacks: This article offers a summary of the approaches used in the design of Cascaded-Integrator Comb (CIC) filters, focusing on their implementation in Field Programmable Gate Arrays (FPGAs). The For a CIC decimator, the compensation filter operates at the decimated sample rate and provides shaping. PROPOSED COMPENSATION FILTER The transfer function of the proposed compensation filter is given by M M M H COMP z a bz az 2, (3) this problem can be alleviated by a compensation filter. Altera’s CIC Compiler MegaCore® function implements various CIC Specify the rate-change factor of the CIC filter being compensated as a positive integer scalar. As the channel selection fil- ter generally has the symmetric characteristics in frequency response, the CIC roll-off compensation filter should also have the symmetric characteristics. With the dotted curve representing the uncompensated passband droop of a 1st-order R = 8 CIC filter, The CIC filter has an input with sample rate of 10 MHz and the output of the CIC has the sample rate of 500 kHz (e. The CIC filter and Thus, the proposed CIC compensation filter structure based on a signed digit number system is an efficient method to speed up the filter operation with low power consumption and improved magnitude This paper presents implementation of minimax Sharpened Cascaded Integrator Comb (SCIC) decimation filter using polyphase decomposition. For well defined rate change systems, the narrow A simple second-order sine-based CIC (cascaded-integrator-comb) compensator is presented. 4, No. The basic structure of CIC filter has been discussed Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. 128. These filters require only two additions and can be straightforwardly realised in terms of the integer d as a design parameter, which depends on K, the number of cascaded CIC filters. Lett. A general method to design GCF compensation filter IEEE Trans. 1 Excerpt; Save. The selector realizes the selection of the specific frequency signal, the shift register is used to store the signal data, and the Without using a counter measure in the form of a compensation filter, the frequency response in the pass band can easily exceed the maximum ripple requirements of the overall filter specification. This can be done by digital signal processing. In digitized form different wireless standards requires different sample rates for baseband processing. To overcome the magnitude droop. Now, I want to design a compensation filter after the CIC but am having a hard time to configure the some of parameters. CIC filters have two drawbacks: Description. Keywords : Multirate Filtering, CIC decimation filter, Compensation theory, Retiming, Retiming algorithm, Filter order, Synchronous dataflow graph. - satirebird/cic-filter. vjsrn trawvfirh zgoch hmrvax iwkf ybgigj ozgiae akfy tjnint rxuls