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@@ -17,20 +17,22 @@ class fm_radio(gnuradio.gr.top_block):
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def __init__(self):
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gnuradio.gr.top_block.__init__(self, "FM Radio Receiver", catch_exceptions=True)
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- samp_rate = 2560000
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channel_width_hertz = 250000
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audio_sample_rate_hertz = 48000
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rtlsdr_source = osmosdr.source()
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- rtlsdr_source.set_sample_rate(samp_rate)
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+ rtlsdr_source.set_sample_rate(2560000) # Hz
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rtlsdr_source.set_center_freq((98.3 * 1e6), 0)
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resampler = gnuradio.filter.rational_resampler_fff(
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interpolation=audio_sample_rate_hertz, decimation=channel_width_hertz
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)
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low_pass_filter = gnuradio.filter.fir_filter_ccf(
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- samp_rate // channel_width_hertz,
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+ int(rtlsdr_source.get_sample_rate() / channel_width_hertz),
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gnuradio.filter.firdes.low_pass(
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- 2, samp_rate, 100000, 10000, gnuradio.fft.window.WIN_KAISER, 6.76
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+ gain=2,
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+ sampling_freq=rtlsdr_source.get_sample_rate(),
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+ cutoff_freq=100000,
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+ transition_width=10000,
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),
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)
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audio_sink = gnuradio.audio.sink(audio_sample_rate_hertz)
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