Efficient sharpening CIC filter embedding fifth-order filter with coefficient optimisation algorithm

This Letter presents an optimised cascaded integrator comb (CIC) filter sharpening algorithm embedding a fifth-order finite impulse response filter, which improves the worst-case alias rejection and simultaneously compensates the passband droop. The sharpening filter is designed without multipliers,...

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Bibliographic Details
Published in:Electronics letters 2020-11, Vol.56 (23), p.1241-1243
Main Authors: Zhibin, Lin, Bo, Gao, Ruotong, Yin, Min, Gong
Format: Article
Language:English
Subjects:
band‐pass filters
cascade networks
circuit optimisation
Circuits and systems
coefficient optimisation algorithm
comb filters
efficient sharpening CIC filter
fifth‐order finite impulse response filter
FIR filters
fourth‐order CIC filter design
hardware complexity
noise figure 0.015 dB
noise figure 128.0 dB
optimised cascaded integrator comb filter sharpening algorithm
passband distortion
passband droop compensation
sharpening filter
worst‐case alias rejection
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Summary:This Letter presents an optimised cascaded integrator comb (CIC) filter sharpening algorithm embedding a fifth-order finite impulse response filter, which improves the worst-case alias rejection and simultaneously compensates the passband droop. The sharpening filter is designed without multipliers, which reduces hardware complexity. The results of a fourth-order CIC filter design practice show that the proposed algorithm improves the worst-case alias rejection to 128 dB, meanwhile the passband distortion is only 0.015 dB.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2020.1433