From 6246efbefcdb6807daa7c245ebe7a975ab0ce7d4 Mon Sep 17 00:00:00 2001
From: Tom Rondeau
Date: Mon, 6 Dec 2010 13:52:55 -0500
Subject: Modifying blsk2 wrapper for PFB arbitrary resampler to allow the user
 to just specify the requested resampling rate without providing their own
 filter taps.

Taps are then generated inside hier_block2 to cover full bandwidth of input signal.

Optional attenuation parameter may be provided.
---
 .../src/python/gnuradio/blks2impl/pfb_arb_resampler.py        | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'gnuradio-core')

diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/pfb_arb_resampler.py b/gnuradio-core/src/python/gnuradio/blks2impl/pfb_arb_resampler.py
index e40d9636a..cd9289fa5 100644
--- a/gnuradio-core/src/python/gnuradio/blks2impl/pfb_arb_resampler.py
+++ b/gnuradio-core/src/python/gnuradio/blks2impl/pfb_arb_resampler.py
@@ -31,15 +31,22 @@ class pfb_arb_resampler_ccf(gr.hier_block2):
     streams. This block is provided to be consistent with the interface to the
     other PFB block.
     '''
-    def __init__(self, rate, taps, flt_size=32):
+    def __init__(self, rate, taps=None, flt_size=32, atten=80):
 	gr.hier_block2.__init__(self, "pfb_arb_resampler_ccf",
 				gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
 				gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
         
         self._rate = rate
-        self._taps = taps
         self._size = flt_size
 
+        if taps is not None:
+            self._taps = taps
+        else:
+            # Create a filter that covers the full bandwidth of the input signal
+            bw = 0.5
+            tb = 0.1
+            self._taps = gr.firdes.low_pass_2(self._size, self._size, bw, tb, atten)
+
         self.pfb = gr.pfb_arb_resampler_ccf(self._rate, self._taps, self._size)
 
         self.connect(self, self.pfb)
-- 
cgit