def __init__(self, interp, taps=None, atten=100):
gr.hier_block2.__init__(self, "pfb_interpolator_ccf",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._interp = interp
self._taps = taps
if taps is not None:
self._taps = taps
else:
# Create a filter that covers the full bandwidth of the input signal
bw = 0.4
tb = 0.2
ripple = 0.99
made = False
while not made:
try:
self._taps = optfir.low_pass(self._interp, self._interp, bw, bw+tb, ripple, atten)
made = True
except RuntimeError:
ripple += 0.01
made = False
print("Warning: set ripple to %.4f dB. If this is a problem, adjust the attenuation or create your own filter taps." % (ripple))
# Build in an exit strategy; if we've come this far, it ain't working.
if(ripple >= 1.0):
raise RuntimeError("optfir could not generate an appropriate filter.")
self.pfb = gr.pfb_interpolator_ccf(self._interp, self._taps)
self.connect(self, self.pfb)
self.connect(self.pfb, self)
def __init__(self, interp, taps):
gr.hier_block2.__init__(self, "pfb_interpolator_ccf",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._interp = interp
self._taps = taps
self.pfb = gr.pfb_interpolator_ccf(self._interp, self._taps)
self.connect(self, self.pfb)
self.connect(self.pfb, self)
def __init__(self, interp, taps):
gr.hier_block2.__init__(
self,
"pfb_interpolator_ccf",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._interp = interp
self._taps = taps
self.pfb = gr.pfb_interpolator_ccf(self._interp, self._taps)
self.connect(self, self.pfb)
self.connect(self.pfb, self)
def __init__(self, interp, taps=None, atten=100):
gr.hier_block2.__init__(
self,
"pfb_interpolator_ccf",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._interp = interp
self._taps = taps
if taps is not None:
self._taps = taps
else:
# Create a filter that covers the full bandwidth of the input signal
bw = 0.4
tb = 0.2
ripple = 0.99
made = False
while not made:
try:
self._taps = optfir.low_pass(self._interp, self._interp,
bw, bw + tb, ripple, atten)
made = True
except RuntimeError:
ripple += 0.01
made = False
print(
"Warning: set ripple to %.4f dB. If this is a problem, adjust the attenuation or create your own filter taps."
% (ripple))
# Build in an exit strategy; if we've come this far, it ain't working.
if (ripple >= 1.0):
raise RuntimeError(
"optfir could not generate an appropriate filter.")
self.pfb = gr.pfb_interpolator_ccf(self._interp, self._taps)
self.connect(self, self.pfb)
self.connect(self.pfb, self)
