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发明授权
CN105353216B 一种高效FIR滤波器级联DFT算法 有权

一种高效FIR滤波器级联DFT算法
摘要：
本发明专利提供一种高效FIR滤波器级联DFT算法，专利利用卷积定义，推导出M阶FIR滤波器级联N点DFT算法的滤波系数R(M+N‑1)和I(M+N‑1)的计算公式，在离线计算出级联后的滤波系数后，将两个独立的滤波器合并成了一个滤波器，提升了计算效率，有效地解决了滤波器级联带来的运算量大问题。
摘要（英）：

The invention provides a high efficiency FIR filter cascade DFT algorithm. Convolution definition is utilized, a calculation formula for R(M+N-1) and I(M+N-1) filtering coefficients of an M-order FIR filter cascade N-point DFT algorithm is derived, after a filtering coefficient after cascade is calculated in an off-line mode, two independent filters are integrated into one filter, calculation efficiency is improved, a problem of large operand caused by filter cascade is effectively solved.

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