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Method for determining the transmittance of a filter circuit for transforming a filter impulse response in a minimum phase response and filter circuit using this method
Method for determining the transmittance of a filter circuit for transforming a filter impulse response in a minimum phase response and filter circuit using this method
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机译:确定用于在最小相位响应中转换滤波器脉冲响应的滤波器电路的透射率的方法和使用该方法的滤波器电路
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摘要
Method for determining the transmittance of a filter circuit (3) provided for converting the impulse response H(z) of a filter (2) into a minimum-phase response. The method comprises a calculation of the theoretical frequency response of the filter circuit (3) and the impulse frequency response with minimum phase, by imposing a condition of causality on the cepestra of the minimum-phase response, a determination of the theoretical transmittance by fast inverse Fourier transform of the theoretical frequency response, an estimate of the transmittance of the filter circuit (3) by truncation of the theoretical transmittance of which only a predetermined number of coefficients are kept, and a determination of the overall minimum-phase response from a limited development of the cepestra. IMAGE
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