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Note for Digital Signal Processing - DSP By Lokesh Lodha

  • Digital Signal Processing - DSP
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Using the radix-4 decimation-in-time algorithm. Q7. Determine the order of the analog Butterworth filter that has a (-2) db pass band attenuation at a frequency of 20 rad/sec and atleast (-10) db stop band attenuation at 30 rad/sec. Q8. Consider a Chebychev filter with attenuation not more than 1.0 dB for | w |1000 rads / s and at least 10 dB for | w |5000 rads / s. Q9. Let us design a Butterworth LP filter with specifications: Passband amplitude to be within 2.0 dB for frequencies below 0.2π rad / s and the stopband magnitude to be less than 10 dB for 0. 4π rad / s or above. Assume unity gain at D.C. Q10. A non-recursive filter is characterized by the transfer function H(z) =1 + 2z + 3z2+ 4 z3 + 3 z4+ 2 z5+ z6 z6 Find the group delay. ******************

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