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All-Phase FIR Filter Design Based on Two Kinds of Symmetric Frequency Sampling |
Huang Xiang-dong; Wang Zhao-hua |
School of Electronics and Information Engineering, Tianjin University, Tianjin 300072, China |
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Abstract This paper presents the all-phase filter design methods based on two kinds of symmetric frequency sampling. Under the condition of no window and single window, it is proved that the all-phase transfer curves designed by conventional symmetry frequency vector and even symmetry frequency vector can pass through the frequency sampling points of odd multiples and even multiples of π/N, respectively. In this way all-phase filter can control critical frequency to a relatively precise extent. Simulation experiment proves that the performances of these two kinds of all-phase filter are superior to that of filter designed by neural network methods.
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Received: 28 July 2005
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