Subexpression encoded extrapolated impulse response FIR filter with perfect residual compensation
Subexpression encoded extrapolated impulse response FIR filter with perfect residual compensation
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DOI：
10.1109/iscas.2008.4541950
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发表时间：
2008-05
期刊：
影响因子：
--
通讯作者：
Y. Yu;Dong Shi;Y. Lim
中科院分区：
文献类型：
--
作者：
Y. Yu;Dong Shi;Y. Lim
早期的研究表明，滤波器脉冲响应是准周期的，滤波器系数可以通过外推技术来近似。本文提出了一种离散系数外推脉冲响应滤波器。引入残差补偿技术，使滤波系数得以完美实现。外推的滤波系数和残差都进行了子表达式编码，以最小化滤波复杂度。数值算例表明，与现有的任何方法相比，该方法在滤波器的综合中实现了加法器数量最少的目标。
Earlier research has shown that filter impulse responses are quasi-periodic and filter coefficients can be approximated by extrapolation techniques. In this paper, a discrete coefficient extrapolated impulse response filter is proposed. Residual compensation technique is introduced to perfectly realize the filter coefficients. Both the extrapolated filter coefficients and the residuals are subexpression encoded to minimize the filter complexity. Numerical example shows that the proposed technique achieves minimum number of adders in the synthesis of the filter when compared with any other existing techniques.