?? ideal_lowpass-highpass_filter_impulse_response.m
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% dlh.m - ideal lowpass/highpass FIR filter%% h = dlh(s, wc, N) = row vector%% s = 1, -1 = lowpass, highpass% N = 2M+1 = filter length (odd)% wc = cutoff frequency in [rads/sample]function h = dlh(s, wc, N)M = (N-1)/2;for k = -M:M, if k == 0, h(k+M+1) = (1-s) / 2 + s * wc / pi; else h(k+M+1) = s * sin(wc * k) / (pi * k); endend?? 快捷鍵說明
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