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detect: remove unused code

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since we now compensate for frequency drift, these estimates may be too
pessimistic.
This commit is contained in:
Roman Zeyde
2015-01-16 12:46:29 +02:00
parent cbcf2860b9
commit 5c4849be1c
1 changed files with 2 additions and 7 deletions
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9
amodem/detect.py
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@@ -54,14 +54,9 @@ class Detector(object):
length = (self.CARRIER_THRESHOLD - 1) * self.Nsym
begin = offset - length
x = np.concatenate(tuple(bufs)[-self.CARRIER_THRESHOLD:-1])
Hc = dsp.exp_iwt(-self.omega, len(x))
amplitude = np.abs(np.dot(Hc, x) / (0.5 * len(x)))
start_time = begin * self.Tsym / self.Nsym
log.info('Carrier detected at ~%.1f ms @ %.1f kHz:'
' coherence=%.3f%%, amplitude=%.3f',
start_time * 1e3, self.freq / 1e3,
np.abs(dsp.coherence(x, self.omega)) * 100, amplitude)
log.info('Carrier detected at ~%.1f ms @ %.1f kHz',
start_time * 1e3, self.freq / 1e3)
log.debug('Buffered %d ms of audio', len(bufs))