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function [h, a]= intfilt(R, L, freqmult)
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// This function estimate Interpolated FIR Filter Design.
// Calling Sequence
// h=intfilt(R,L,freqmult)
// [h a]=intfilt(R,L,freqmult)
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// Parameters
// R: Samples. It should be numeric
// L: bandlimited interpolation samples. It must be nonzero.
// freqmult: bandlimitedness of ALPHA times the Nyquist frequency, IT can be numeric or character ('B' or 'L', B is length
// (N+1)*L-1 for N odd and (N+1)*L for N even)
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// h: linear phase FIR filter.
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// Examples
// h=intfilt(20,10,'l') // The output of this example has 220 columns ,so it is difficult to write it here.
// h=intfilt(20,10,1) // The output of this example has 220 columns ,so it is difficult to write it here.
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//h1=intfilt(2,3,'l');
//OUTPUT :
// - 0.0625 0. 0.5625 1. 0.5625 0. - 0.0625
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//h2=intfilt(4,1,1);
//OUTPUT :
// 0.3001054 0.6366198 0.9003163 1. 0.9003163 0.6366198 0.3001054
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// See also
// Authors
// Jitendra Singh