The Design of Linear-Phase FIR Multiple-Notch Filters with Variable Notch Frequencies |
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Authors: | Wei Xu Jiaxiang Zhao Hongjie Wang |
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Affiliation: | 1.School of Electronics and Information Engineering,Tianjin Polytechnic University,Tianjin,China;2.College of Electronic Information and Optical Engineering,Nankai University,Tianjin,China;3.College of Information Technical Science,Nankai University,Tianjin,China |
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Abstract: | In this paper, a paradigm is developed to design the linear-phase FIR multiple-notch filters with variable notch frequencies. The design procedure can be proceeded through two steps: First, a linear-phase narrow-band low-pass filter met the given bandwidth and stopband ripple specifications is designed. Second, a tuning procedure is applied to the computed low-pass filter to yield the desired multiple-notch filter. When the notch frequencies are varied, the same tuning procedure can be employed to render the multiple-notch filter with the new set of the notch frequencies. The tuning procedure employed reduces the computational complexity of designing the multiple-notch filter with the new set of the notch frequencies. The simulation results demonstrate the effectiveness of our scheme. |
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