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低復(fù)雜度的可變分?jǐn)?shù)時延濾波器設(shè)計

黃翔東,  徐婧文,  張博,  馬欣

黃翔東, 徐婧文, 張博, 馬欣. 低復(fù)雜度的可變分?jǐn)?shù)時延濾波器設(shè)計[J]. 電子與信息學(xué)報, 2018, 40(4): 985-991. doi: 10.11999/JEIT170349
引用本文: 黃翔東, 徐婧文, 張博, 馬欣. 低復(fù)雜度的可變分?jǐn)?shù)時延濾波器設(shè)計[J]. 電子與信息學(xué)報, 2018, 40(4): 985-991. doi: 10.11999/JEIT170349
HUANG Xiangdong, XU Jingwen, ZHANG Bo, MA Xin. Low-complexity Design of Variable Fractional Delay Filters[J]. Journal of Electronics & Information Technology, 2018, 40(4): 985-991. doi: 10.11999/JEIT170349
Citation: HUANG Xiangdong, XU Jingwen, ZHANG Bo, MA Xin. Low-complexity Design of Variable Fractional Delay Filters[J]. Journal of Electronics & Information Technology, 2018, 40(4): 985-991. doi: 10.11999/JEIT170349

低復(fù)雜度的可變分?jǐn)?shù)時延濾波器設(shè)計

doi: 10.11999/JEIT170349 cstr: 32379.14.JEIT170349
基金項目: 

國家自然科學(xué)基金(61671012)

Low-complexity Design of Variable Fractional Delay Filters

Funds: 

The National Natural Science Foundation of China (61671012)

  • 摘要: 為實現(xiàn)低復(fù)雜度、高精度的可變分?jǐn)?shù)時延濾波器設(shè)計，該文提出一種截止頻率可控的高效設(shè)計法。該方法將全相位濾波器的解析設(shè)計與三次樣條插值和泰勒級數(shù)展開相結(jié)合，既可以通過設(shè)置時延參數(shù)精確地調(diào)整濾波器的分?jǐn)?shù)時延，又可以通過設(shè)置截止頻率參數(shù)快速配置Farrow結(jié)構(gòu)中各子濾波器的抽頭系數(shù)，從而靈活地調(diào)整濾波器的截止頻率。仿真實驗表明，所提方法適用于設(shè)計具有中、低截止頻率的可變分?jǐn)?shù)時延濾波器，其設(shè)計復(fù)雜度相比于現(xiàn)有的加權(quán)最小二乘設(shè)計法低1個數(shù)量級。
    Abstract: In order to design variable fractional delay filters with low complexity and high accuracy, an efficient design method with controllable cut-off frequency is proposed, which integrates the analytic all-phase filter design, the cubic spline interpolation and Taylor series expansion. In the proposed design, not only the time delay of the filter can be precisely adjusted by setting the delay parameter, but also the tap coefficients of each subfilter in the Farrow structure can be rapidly configured via setting the cut-off frequency parameter, thus the cut-off frequency of the filter can be adjusted flexibly. Numerical simulations show that, the proposed method is especially suitable to design variable fractional delay filters with low or middle cut-off frequencies, and its computation complexity is one order of magnitude lower than that of the existing Weighted Least Squares (WLS) design.
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出版歷程
  • 收稿日期:  2017-04-19
  • 修回日期:  2018-03-12
  • 刊出日期:  2018-04-19

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