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Unformatted text preview: EE 2200 / Spring 2009: Assignment Four 1 ECE 2200 / Spring 2009 FREQUENCY SELECTIVE FILTERS ASSIGNMENT FOUR 1 1. Consider the filter with impulse response h [ k ] = [ k ] + [ k 1] (a) Plot its polezero diagram (b) Plot its frequency response using freqz (c) Is this a highpass, lowpass, or bandpass filter? Explain your answer. 2. Consider the filter with impulse response h [ k ] = [ k ] [ k 1] (a) Plot its polezero diagram (b) Plot its frequency response using freqz (c) Is this a highpass, lowpass, or bandpass filter? Explain your answer. 3. Consider the bandpass filter design procedure described in section 77.3 of McClel lan, Schafer, and Yoder, Signal Processing First (Pearson Prentice Hall, 2003). The passband is chosen by removing a complex conjugate zero pair from a collection of uniformly spaced zeros on the unit circle. (a) Use this approach to design an FIR bandpass filter with impulse response N 1 i =0 a i z i with N coefficients to pass the frequency 2 (3 / 11). (b) Discuss what values of N can be used. (c) For the smallest possible N , plot the frequency repsonse of the filter using Matlab. Is this filter a linear phase filter?...
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 Spring '05
 JOHNSON
 Frequency

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