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| author | Andy Walls <awalls@md.metrocast.net> | 2016-03-30 07:43:58 -0400 |
|---|---|---|
| committer | Andy Walls <awalls@md.metrocast.net> | 2016-03-30 07:43:58 -0400 |
| commit | 2ae7809b845b7930c9b0120737167dd1251098eb (patch) | |
| tree | d028c40bd64a8e5ec1a455a213ca624513d89f46 /gr-analog/python/analog | |
| parent | 137ae3420b370de42cac2fcb7b1e212968f3a638 (diff) | |
gr-analog: FM emphasis filters use "newstyle" taps
In redesign of the FM emphasis filters, I fell into the gr-filter
implementation trap of the default "oldstyle=True" taps.
This caused the pole of the IIR filter to be reflected about the
z = j w axis, resulting in an incorrect filter.
Set the filters to use newstyle taps.
Diffstat (limited to 'gr-analog/python/analog')
| -rw-r--r-- | gr-analog/python/analog/fm_emph.py | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gr-analog/python/analog/fm_emph.py b/gr-analog/python/analog/fm_emph.py index e457f56dc0..7637743d91 100644 --- a/gr-analog/python/analog/fm_emph.py +++ b/gr-analog/python/analog/fm_emph.py @@ -137,7 +137,7 @@ class fm_deemph(gr.hier_block2): global plot1 plot1 = gru.gnuplot_freqz(gru.freqz(btaps, ataps), fs, True) - deemph = filter.iir_filter_ffd(btaps, ataps) + deemph = filter.iir_filter_ffd(btaps, ataps, False) self.connect(self, deemph, self) # @@ -321,5 +321,5 @@ class fm_preemph(gr.hier_block2): global plot2 plot2 = gru.gnuplot_freqz(gru.freqz(btaps, ataps), fs, True) - preemph = filter.iir_filter_ffd(btaps, ataps) + preemph = filter.iir_filter_ffd(btaps, ataps, False) self.connect(self, preemph, self) |