Frequency-Response Masking Based Fir Filter Design With Power-Of-Two Coefficients And Suboptimum PWR
Frequency-Response Masking Based Fir Filter Design With Power-Of-Two Coefficients And Suboptimum PWR
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DOI：
10.1142/s0218126603001045
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发表时间：
2003-10
期刊：
影响因子：
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通讯作者：
Wei Rong Lee;V. Rehbock;K. Teo;L. Caccetta
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文献类型：
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作者：
Wei Rong Lee;V. Rehbock;K. Teo;L. Caccetta
本文提出了一种设计具有二次幂系数的锐线性相位FIR滤波器的新方法。该方法是基于频率响应掩蔽技术。该方法以子滤波器的二次幂系数和连续尺度参数为决策变量，以最小化峰值加权涟漪（PWR）为设计目标。首先将每个子滤波器的非线性混合整数优化问题简化为等效的离散优化问题，然后裁剪其搜索区域以提高计算效率，类似于参考文献1中的方法，尽管这里使用了不同的裁剪策略。通过一个低通线性相位锐化FIR数字滤波器的例子，证明了该方法的有效性。
This paper presents a new method for designing sharp linear phase FIR filters with power-of-two coefficients. The method is based on a frequency-response masking technique. In this method, the power-of-two coefficients and continuous scaling parameters of the subfilters are taken to be decision variables, and minimizing peak weighted ripple (PWR) is taken to be the design objective. The resulting nonlinear mixed integer optimization problem for each subfilter is first reduced to an equivalent discrete optimization problem whose search region is then cropped for efficiency of computation, similar to the approach in Ref. 1, although a different cropping strategy is used here. The effectiveness of the method is demonstrated through a lowpass linear phase sharp FIR digital filter example.