Digital Signal Processing Final Solutions
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چکیده
(b) There are several ways to construct linear-phase FIR filters, including windowing the IDTFT of an ideal response, but in order to ensure a minimax-optimal filter (i.e., a filter that minimizes the maximum deviation from a piecewise-constant ideal specification), the way we know is via the Parks-McClellan approach. In fact. this filter was designed in Matlab as: >> h = firpm(8, [0 0.55 0.65 1], [1 1 0 0]); That is, it’s an equiripple low-pass filter with equal-sized ripples in both pass and stop band, with a passband edge at 0.55π rad/samp, and a stopband edge at 0.65π rad/sec.
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تاریخ انتشار 2011