| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
In this work, we consider the design method for infinite impulse response (IIR) digital filters and digital differentiators. First, we formulate the filter design problem by linearizing the weighted least squared error criterion. We employ a multiband-response and differentiation-response as an ideal response. Then, the design problem can be expressed in a quadratic form (convex function) without requiring any frequency sampling. Furthermore, we develop a design algorithm which can specify the maximum pole radius without any iterative optimization. By utilizing the results above, we propose several more design methods for filters which have semi-sparse (0, 1, -1) coefficients or discrete coefficients.
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