Пример #1
0
    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)
Пример #2
0
    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)
Пример #4
0
    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)