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Efficient sharpening CIC filter embedding fifth-order filter with coefficient optimisation algorithm
Electronics Letters ( IF 0.7 ) Pub Date : 2020-10-02 , DOI: 10.1049/el.2020.1433
Lin Zhibin 1 , Gao Bo 1 , Yin Ruotong 1 , Gong Min 1
Affiliation  

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.

中文翻译:

高效锐化CIC滤波器嵌入五阶滤波器系数优化算法

本文介绍了一种优化的级联积分器梳状 (CIC) 滤波器锐化算法,该算法嵌入了一个五阶有限脉冲响应滤波器,可改善最坏情况的混叠抑制并同时补偿通带下垂。锐化滤波器的设计没有乘法器,这降低了硬件复杂性。四阶CIC滤波器设计实践结果表明,该算法将最坏情况混叠抑制提高到128 dB,同时通带失真仅为0.015 dB。
更新日期:2020-10-02
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