Using Cascaded Non-Identical CIC Sections to Improve Insertion Loss

A novel class of cascaded-integrator-comb (CIC) filter functions, which preserve the CIC filter simplicity avoiding the multipliers, is proposed in this paper. The proposed class is designed using several cascaded non-identical CIC sections. The paper provides its non-recursive and recursive forms, as well as frequency response. Compared with classical CIC finite impulse response (FIR) filters designed novel class shows excellent performances in term of insertion loss in stopband and selectivity. To verify the behavior of the proposed novel class of CIC FIR filter functions, several illustrative examples are provided. Also, comparisons of the novel filter class with existing classical CIC structures and some recent improvements given in the literature are provided. For the same level of a constant group delay of 31.5 s, a classical CIC filter function has insertion loss of 115.176 dB, and proposed novel filter function has 136.757 dB. It has achieved significant improvement of 21.581 dB or approximately about 20%.

[1]  Sanjit K. Mitra,et al.  Digital Signal Processing: A Computer-Based Approach , 1997 .

[2]  Alfonso Fernández-Vázquez,et al.  Maximally Flat CIC Compensation Filter: Design and Multiplierless Implementation , 2012, IEEE Transactions on Circuits and Systems II: Express Briefs.

[3]  Massimiliano Laddomada,et al.  An improved class of multiplierless decimation filters: Analysis and design , 2013, Digit. Signal Process..

[4]  Nebojsa Doncov,et al.  1D and 2D economical FIR filters generated by Chebyshev polynomials of the first kind , 2013 .

[5]  Massimiliano Laddomada.  Comb-Based Decimation Filters for $\Sigma \Delta$ A/D Converters: Novel Schemes and Comparisons , 2007, IEEE Transactions on Signal Processing.

[6]  Jeffrey O. Coleman.  Chebyshev Stopbands for CIC Decimation Filters and CIC-Implemented Array Tapers in 1D and 2D , 2012, IEEE Transactions on Circuits and Systems I: Regular Papers.

[7]  G. Jovanovic Dolecek.  Simple wideband CIC compensator , 2009 .

[8]  Nebojsa Doncov,et al.  Christoffel-Darboux Formula Most Directly Applied in Generating Economical Linear Phase Low-Pass Digital FIR Filter Functions , 2012 .

[9]  Dragan Antić,et al.  Low complexity lowpass linear-phase multiplierless FIR filter , 2013 .

[10]  V. D. Pavlovic,et al.  Ultra-selective spike multiplierless linear-phase two-dimensional FIR filter function with full Hilbert transform effect , 2014, IET Circuits Devices Syst..

[11]  Gordana Jovanovic-Dolecek,et al.  Design of wideband CIC compensator filter for a digital IF receiver , 2009, Digit. Signal Process..

[12]  Dejan N. Milic,et al.  A New Class of Low Complexity Low-Pass Multiplierless Linear-Phase Special CIC FIR Filters , 2014, IEEE Signal Processing Letters.

[13]  Gordon L. Stüber,et al.  Modified CIC filter for sample rate conversion in software radio systems , 2003, IEEE Signal Processing Letters.

[14]  Gordana Jovanovic Dolecek,et al.  Novel droop-compensated comb decimation filter with improved alias rejections , 2013 .

[15]  Biljana P. Stošić,et al.  On design of a novel class of selective CIC FIR filter functions with improved response , 2014 .

[16]  Sanjit K. Mitra,et al.  Simple method for compensation of CIC decimation filter , 2008 .

[17]  E. Hogenauer,et al.  An economical class of digital filters for decimation and interpolation , 1981 .

[18]  Dragan Antić,et al.  Ultra-selective lowpass linear-phase FIR filter function , 2013 .

[19]  Gordana Jovanovic Dolecek,et al.  Trigonometrical approach to design a simple wideband comb compensator , 2014 .

[20]  Sanjit K. Mitra,et al.  A new two-stage sharpened comb decimator , 2005, IEEE Transactions on Circuits and Systems I: Regular Papers.

[21]  Biljana P. Stošić,et al.  Design of selective CIC filter functions , 2014 .