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equalizer: add lookahead estimation

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Roman Zeyde
2014-08-28 13:46:54 +03:00
parent 550b337c05
commit 5735533a3b
2 changed files with 12 additions and 9 deletions
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8
tests/test_equalizer.py
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@@ -53,9 +53,11 @@ def test_isi():
num = np.array([0.5])
y = dsp.lfilter(x=x, b=num, a=den)
h = equalizer.equalize(y, symbols, order=len(den))
assert_approx(h, den / num)
lookahead = 2
h = equalizer.equalize(y, symbols, order=len(den), lookahead=lookahead)
assert norm(h[:lookahead]) < 1e-12
assert_approx(h[lookahead:], den / num)
y = dsp.lfilter(x=y, b=h, a=[1])
y = dsp.lfilter(x=y, b=h[lookahead:], a=[1])
z = equalizer.demodulator(y, size=length)
assert_approx(z, symbols)