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Digital filter system whose stopband roots lie on unit circle of complex plane and associated method
Digital filter system whose stopband roots lie on unit circle of complex plane and associated method
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机译：阻带根位于复杂平面的单位圆上的数字滤波器系统及相关方法
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摘要
A method is disclosed for providing a digital filter system for providing a low pass filter function to a digital input. The method includes the steps of determining a finite impulse response of the input, determining a transfer function of the finite impulse response and providing a polynomial, identifying a plurality of stopband roots of the polymonial that lie in a complex plane, identifying real and complex conjugate pairs for the plurality of stopband roots, and providing coefficients for a complex polynomial that realizes the real and complex conjugate pairs such that a plurality of adjusted stopband roots lie on a unit circle of said complex plane.
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