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• W2279686962 abstract "Circularly symmetric two-dimensional (2D) finite impulse response (FIR) filters find extensive use in image and medical applications, especially for isotropic filtering. Moreover, the design and implementation of 2D digital filters with variable fractional delay and variable magnitude responses without redesigning the filter has become a crucial topic of interest due to its significance in low-cost applications. Recently the design using fixed word length coefficients has gained importance due to the replacement of multipliers by shifters and adders, which reduces the hardware complexity. Among the various approaches to 2D design, transforming a one-dimensional (1D) filter to 2D by transformation, is reported to be an efficient technique. In this paper, 1D variable digital filters (VDFs) with tunable cut-off frequencies are designed using Farrow structure based interpolation approach, and the sub-filter coefficients in the Farrow structure are made multiplier-less using canonic signed digit (CSD) representation. The resulting performance degradation in the filters is overcome by using artificial bee colony (ABC) optimization. Finally, the optimized 1D VDFs are mapped to 2D using generalized McClellan transformation resulting in low complexity, circularly symmetric 2D VDFs with real-time tunability." @default.
• W2279686962 created "2016-06-24" @default.
• W2279686962 creator A5025466408 @default.
• W2279686962 creator A5037335799 @default.
• W2279686962 date "2016-05-01" @default.
• W2279686962 modified "2023-10-18" @default.
• W2279686962 title "Design of efficient circularly symmetric two-dimensional variable digital FIR filters" @default.
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• W2279686962 doi "https://doi.org/10.1016/j.jare.2016.01.005" @default.
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