Work in progress, updating usrp_rx_flex.py

Optimized channel bandwith filter
Optimized matched filter

2 files changed, 640 insertions, 301 deletions

diff --git a/gr-pager/apps/usrp_rx_flex.grc b/gr-pager/apps/usrp_rx_flex.grc
index c324eaa3e..2d16e1cd6 100644
--- a/gr-pager/apps/usrp_rx_flex.grc
+++ b/gr-pager/apps/usrp_rx_flex.grc
@@ -1,6 +1,6 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Sun Oct 11 14:19:38 2009</timestamp>
+  <timestamp>Sat Oct 17 11:46:38 2009</timestamp>
   <block>
     <key>options</key>
     <param>
@@ -25,7 +25,7 @@
     </param>
     <param>
       <key>window_size</key>
-      <value>1280, 1024</value>
+      <value>4095,4095</value>
     </param>
     <param>
       <key>generate_options</key>
@@ -83,7 +83,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>decim</value>
+      <value>sample_rate</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -91,11 +91,11 @@
     </param>
     <param>
       <key>value</key>
-      <value>16</value>
+      <value>adc_rate/decim</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(310, 11)</value>
+      <value>(382, 12)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -106,7 +106,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>sample_rate</value>
+      <value>freq</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -114,11 +114,11 @@
     </param>
     <param>
       <key>value</key>
-      <value>adc_rate/decim</value>
+      <value>band_freq+(channel-61)*25e3</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(382, 12)</value>
+      <value>(480, 11)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -126,22 +126,117 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>wxgui_fftsink2</key>
     <param>
       <key>id</key>
-      <value>channel_rate</value>
+      <value>wxgui_fftsink2_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>25e3</value>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value>FLEX Spectrum</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>sample_rate</value>
+    </param>
+    <param>
+      <key>baseband_freq</key>
+      <value>band_freq</value>
+    </param>
+    <param>
+      <key>y_per_div</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>y_divs</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>ref_level</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>ref_scale</key>
+      <value>65536</value>
+    </param>
+    <param>
+      <key>fft_size</key>
+      <value>1024</value>
+    </param>
+    <param>
+      <key>fft_rate</key>
+      <value>30</value>
+    </param>
+    <param>
+      <key>peak_hold</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>average</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>avg_alpha</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>win_size</key>
+      <value></value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>0,0,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value>displays,0</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(34, 508)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>180</value>
+    </param>
+  </block>
+  <block>
+    <key>notebook</key>
+    <param>
+      <key>id</key>
+      <value>displays</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>style</key>
+      <value>wx.NB_TOP</value>
+    </param>
+    <param>
+      <key>labels</key>
+      <value>['RX Spectrum','Baseband']</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>1, 0, 1, 5</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(751, 13)</value>
+      <value>(9, 209)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -149,22 +244,22 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>import</key>
     <param>
       <key>id</key>
-      <value>freq</value>
+      <value>import_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>band_freq+(channel-61)*25e3</value>
+      <key>import</key>
+      <value>import os, math</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(480, 11)</value>
+      <value>(10, 76)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -172,22 +267,58 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>usrp_simple_source_x</key>
     <param>
       <key>id</key>
-      <value>channel_decim</value>
+      <value>usrp_source</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>int(sample_rate/channel_rate)</value>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>format</key>
+      <value></value>
+    </param>
+    <param>
+      <key>which</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>decimation</key>
+      <value>decim</value>
+    </param>
+    <param>
+      <key>frequency</key>
+      <value>band_freq</value>
+    </param>
+    <param>
+      <key>lo_offset</key>
+      <value>float('inf')</value>
+    </param>
+    <param>
+      <key>gain</key>
+      <value>rx_gain</value>
+    </param>
+    <param>
+      <key>side</key>
+      <value>A</value>
+    </param>
+    <param>
+      <key>rx_ant</key>
+      <value>RXA</value>
+    </param>
+    <param>
+      <key>hb_filters</key>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(854, 11)</value>
+      <value>(32, 734)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -195,22 +326,124 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>gr_quadrature_demod_cf</key>
+    <param>
+      <key>id</key>
+      <value>fm_demod</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gain</key>
+      <value>demod_k</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(599, 774)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>gr_freq_xlating_fir_filter_xxx</key>
     <param>
       <key>id</key>
+      <value>gr_freq_xlating_fir_filter_xxx_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>ccc</value>
+    </param>
+    <param>
+      <key>decim</key>
+      <value>channel_decim</value>
+    </param>
+    <param>
+      <key>taps</key>
       <value>channel_taps</value>
     </param>
     <param>
+      <key>center_freq</key>
+      <value>band_freq-freq+offset</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>sample_rate</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(321, 750)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>wxgui_scopesink2</key>
+    <param>
+      <key>id</key>
+      <value>wxgui_scopesink2_0</value>
+    </param>
+    <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>value</key>
-      <value>firdes.low_pass(10**1, sample_rate, 10e3, 2.5e3)</value>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value>Channel Waveform</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>channel_rate</value>
+    </param>
+    <param>
+      <key>v_scale</key>
+      <value>8e3</value>
+    </param>
+    <param>
+      <key>t_scale</key>
+      <value>20.0/channel_rate</value>
+    </param>
+    <param>
+      <key>ac_couple</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>xy_mode</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>num_inputs</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>win_size</key>
+      <value></value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>0, 0, 1, 1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value>displays, 1</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(588, 12)</value>
+      <value>(594, 620)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -221,7 +454,7 @@
     <key>wxgui_fftsink2</key>
     <param>
       <key>id</key>
-      <value>wxgui_fftsink2_0</value>
+      <value>wxgui_fftsink2_1</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -233,15 +466,15 @@
     </param>
     <param>
       <key>title</key>
-      <value>FLEX Spectrum</value>
+      <value>Channel Spectrum</value>
     </param>
     <param>
       <key>samp_rate</key>
-      <value>sample_rate</value>
+      <value>channel_rate</value>
     </param>
     <param>
       <key>baseband_freq</key>
-      <value>band_freq</value>
+      <value>freq</value>
     </param>
     <param>
       <key>y_per_div</key>
@@ -280,16 +513,20 @@
       <value>0</value>
     </param>
     <param>
+      <key>win_size</key>
+      <value></value>
+    </param>
+    <param>
       <key>grid_pos</key>
-      <value>0,0,1,1</value>
+      <value>1, 0, 1, 1</value>
     </param>
     <param>
       <key>notebook</key>
-      <value>displays,0</value>
+      <value>displays, 0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(34, 508)</value>
+      <value>(344, 511)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -297,10 +534,33 @@
     </param>
   </block>
   <block>
-    <key>usrp_simple_source_x</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>usrp_source</value>
+      <value>decim</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>20</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(310, 11)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>gr_moving_average_xx</key>
+    <param>
+      <key>id</key>
+      <value>gr_moving_average_xx_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -308,47 +568,69 @@
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
+      <value>float</value>
     </param>
     <param>
-      <key>format</key>
-      <value></value>
+      <key>length</key>
+      <value>8</value>
     </param>
     <param>
-      <key>which</key>
+      <key>scale</key>
+      <value>1.0/8.0</value>
+    </param>
+    <param>
+      <key>max_iter</key>
+      <value>4000</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(831, 758)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable</key>
     <param>
-      <key>decimation</key>
-      <value>decim</value>
+      <key>id</key>
+      <value>ma_ntaps</value>
     </param>
     <param>
-      <key>frequency</key>
-      <value>band_freq</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>lo_offset</key>
-      <value>float('inf')</value>
+      <key>value</key>
+      <value>channel_rate/symbol_rate</value>
     </param>
     <param>
-      <key>gain</key>
-      <value>rx_gain</value>
+      <key>_coordinate</key>
+      <value>(833, 851)</value>
     </param>
     <param>
-      <key>side</key>
-      <value>A</value>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>symbol_rate</value>
     </param>
     <param>
-      <key>rx_ant</key>
-      <value>RXA</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>hb_filters</key>
-      <value></value>
+      <key>value</key>
+      <value>3200</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(32, 734)</value>
+      <value>(590, 12)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -356,22 +638,22 @@
     </param>
   </block>
   <block>
-    <key>import</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>import_0</value>
+      <value>nchan_taps</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>import</key>
-      <value>import os</value>
+      <key>value</key>
+      <value>len(channel_taps)</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(10, 76)</value>
+      <value>(328, 1009)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -382,7 +664,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>config_filename</value>
+      <value>channel_decim</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -390,11 +672,11 @@
     </param>
     <param>
       <key>value</key>
-      <value>os.environ["HOME"]+"/.gnuradio/config.conf"</value>
+      <value>int(sample_rate/channel_rate)</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(9, 133)</value>
+      <value>(906, 12)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -402,10 +684,10 @@
     </param>
   </block>
   <block>
-    <key>variable_config</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>saved_band_freq</value>
+      <value>deviation</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -413,31 +695,34 @@
     </param>
     <param>
       <key>value</key>
-      <value>930.5125e6</value>
+      <value>4800</value>
     </param>
     <param>
-      <key>type</key>
-      <value>real</value>
+      <key>_coordinate</key>
+      <value>(688, 14)</value>
     </param>
     <param>
-      <key>config_file</key>
-      <value>config_filename</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable</key>
     <param>
-      <key>section</key>
-      <value>gr-pager</value>
+      <key>id</key>
+      <value>demod_k</value>
     </param>
     <param>
-      <key>option</key>
-      <value>band_center</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>writeback</key>
-      <value>band_freq</value>
+      <key>value</key>
+      <value>3*channel_rate/(2*math.pi*deviation)</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(228, 311)</value>
+      <value>(598, 857)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -445,10 +730,10 @@
     </param>
   </block>
   <block>
-    <key>variable_config</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>saved_offset</value>
+      <value>channel_taps</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -456,8 +741,54 @@
     </param>
     <param>
       <key>value</key>
+      <value>firdes.low_pass(10, sample_rate, passband/2.0, (channel_rate-passband)/2.0)</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(325, 857)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>config_filename</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>os.environ["HOME"]+"/.gnuradio/config.conf"</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(9, 133)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable_config</key>
+    <param>
+      <key>id</key>
+      <value>saved_band_freq</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>930.5125e6</value>
+    </param>
     <param>
       <key>type</key>
       <value>real</value>
@@ -472,15 +803,15 @@
     </param>
     <param>
       <key>option</key>
-      <value>freq_offset</value>
+      <value>band_center</value>
     </param>
     <param>
       <key>writeback</key>
-      <value>offset</value>
+      <value>band_freq</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(547, 312)</value>
+      <value>(228, 311)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -491,7 +822,7 @@
     <key>variable_config</key>
     <param>
       <key>id</key>
-      <value>saved_rx_gain</value>
+      <value>saved_channel</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -499,7 +830,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>40</value>
+      <value>25</value>
     </param>
     <param>
       <key>type</key>
@@ -515,15 +846,15 @@
     </param>
     <param>
       <key>option</key>
-      <value>rx_gain</value>
+      <value>channel</value>
     </param>
     <param>
       <key>writeback</key>
-      <value>rx_gain</value>
+      <value>channel</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(706, 312)</value>
+      <value>(387, 312)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -531,38 +862,42 @@
     </param>
   </block>
   <block>
-    <key>gr_freq_xlating_fir_filter_xxx</key>
+    <key>variable_config</key>
     <param>
       <key>id</key>
-      <value>gr_freq_xlating_fir_filter_xxx_0</value>
+      <value>saved_offset</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
+      <key>value</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>type</key>
-      <value>ccc</value>
+      <value>real</value>
     </param>
     <param>
-      <key>decim</key>
-      <value>channel_decim</value>
+      <key>config_file</key>
+      <value>config_filename</value>
     </param>
     <param>
-      <key>taps</key>
-      <value>channel_taps</value>
+      <key>section</key>
+      <value>gr-pager</value>
     </param>
     <param>
-      <key>center_freq</key>
-      <value>band_freq-freq+offset</value>
+      <key>option</key>
+      <value>freq_offset</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>sample_rate</value>
+      <key>writeback</key>
+      <value>offset</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(321, 750)</value>
+      <value>(547, 312)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -570,34 +905,42 @@
     </param>
   </block>
   <block>
-    <key>notebook</key>
+    <key>variable_config</key>
     <param>
       <key>id</key>
-      <value>displays</value>
+      <value>saved_rx_gain</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.NB_TOP</value>
+      <key>value</key>
+      <value>40</value>
     </param>
     <param>
-      <key>labels</key>
-      <value>['RX Spectrum','Baseband']</value>
+      <key>type</key>
+      <value>int</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>1, 0, 1, 5</value>
+      <key>config_file</key>
+      <value>config_filename</value>
     </param>
     <param>
-      <key>notebook</key>
-      <value></value>
+      <key>section</key>
+      <value>gr-pager</value>
+    </param>
+    <param>
+      <key>option</key>
+      <value>rx_gain</value>
+    </param>
+    <param>
+      <key>writeback</key>
+      <value>rx_gain</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(9, 209)</value>
+      <value>(706, 312)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -605,10 +948,10 @@
     </param>
   </block>
   <block>
-    <key>variable_slider</key>
+    <key>variable_text_box</key>
     <param>
       <key>id</key>
-      <value>rx_gain</value>
+      <value>band_freq</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -616,35 +959,23 @@
     </param>
     <param>
       <key>label</key>
-      <value>Analog Gain</value>
+      <value>Band Freq.</value>
     </param>
     <param>
       <key>value</key>
-      <value>saved_rx_gain</value>
-    </param>
-    <param>
-      <key>min</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>max</key>
-      <value>100</value>
-    </param>
-    <param>
-      <key>num_steps</key>
-      <value>100</value>
-    </param>
-    <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <value>saved_band_freq</value>
     </param>
     <param>
       <key>converver</key>
       <value>float_converter</value>
     </param>
     <param>
+      <key>formatter</key>
+      <value>None</value>
+    </param>
+    <param>
       <key>grid_pos</key>
-      <value>0, 4, 1, 1</value>
+      <value>0, 0, 1, 1</value>
     </param>
     <param>
       <key>notebook</key>
@@ -652,7 +983,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(658, 122)</value>
+      <value>(225, 121)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -758,54 +1089,45 @@
     </param>
   </block>
   <block>
-    <key>variable_slider</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>channel</value>
+      <value>passband</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Channel</value>
-    </param>
-    <param>
       <key>value</key>
-      <value>saved_channel</value>
+      <value>2*(deviation+symbol_rate)</value>
     </param>
     <param>
-      <key>min</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>max</key>
-      <value>120</value>
-    </param>
-    <param>
-      <key>num_steps</key>
-      <value>119</value>
+      <key>_coordinate</key>
+      <value>(327, 930)</value>
     </param>
     <param>
-      <key>style</key>
-      <value>wx.SL_HORIZONTAL</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable</key>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>id</key>
+      <value>channel_rate</value>
     </param>
     <param>
-      <key>grid_pos</key>
-      <value>0, 1, 1, 1</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>notebook</key>
-      <value></value>
+      <key>value</key>
+      <value>8*3200</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(376, 120)</value>
+      <value>(792, 13)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -813,10 +1135,10 @@
     </param>
   </block>
   <block>
-    <key>variable_text_box</key>
+    <key>variable_slider</key>
     <param>
       <key>id</key>
-      <value>band_freq</value>
+      <value>channel</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -824,23 +1146,35 @@
     </param>
     <param>
       <key>label</key>
-      <value>Band Freq.</value>
+      <value>Channel</value>
     </param>
     <param>
       <key>value</key>
-      <value>saved_band_freq</value>
+      <value>saved_channel</value>
     </param>
     <param>
-      <key>converver</key>
-      <value>float_converter</value>
+      <key>min</key>
+      <value>1</value>
     </param>
     <param>
-      <key>formatter</key>
-      <value>None</value>
+      <key>max</key>
+      <value>120</value>
+    </param>
+    <param>
+      <key>num_steps</key>
+      <value>119</value>
+    </param>
+    <param>
+      <key>style</key>
+      <value>wx.SL_HORIZONTAL</value>
+    </param>
+    <param>
+      <key>converver</key>
+      <value>int_converter</value>
     </param>
     <param>
       <key>grid_pos</key>
-      <value>0, 0, 1, 1</value>
+      <value>0, 1, 1, 1</value>
     </param>
     <param>
       <key>notebook</key>
@@ -848,7 +1182,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(225, 121)</value>
+      <value>(376, 120)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -856,58 +1190,54 @@
     </param>
   </block>
   <block>
-    <key>wxgui_scopesink2</key>
+    <key>variable_slider</key>
     <param>
       <key>id</key>
-      <value>wxgui_scopesink2_0</value>
+      <value>rx_gain</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>complex</value>
-    </param>
-    <param>
-      <key>title</key>
-      <value>Baseband Waveform</value>
+      <key>label</key>
+      <value>Analog Gain</value>
     </param>
     <param>
-      <key>samp_rate</key>
-      <value>channel_rate</value>
+      <key>value</key>
+      <value>saved_rx_gain</value>
     </param>
     <param>
-      <key>v_scale</key>
-      <value>1e3</value>
+      <key>min</key>
+      <value>0</value>
     </param>
     <param>
-      <key>t_scale</key>
-      <value>20.0/channel_rate</value>
+      <key>max</key>
+      <value>100</value>
     </param>
     <param>
-      <key>ac_couple</key>
-      <value>False</value>
+      <key>num_steps</key>
+      <value>100</value>
     </param>
     <param>
-      <key>xy_mode</key>
-      <value>False</value>
+      <key>style</key>
+      <value>wx.SL_HORIZONTAL</value>
     </param>
     <param>
-      <key>num_inputs</key>
-      <value>1</value>
+      <key>converver</key>
+      <value>int_converter</value>
     </param>
     <param>
       <key>grid_pos</key>
-      <value>0, 0, 1, 1</value>
+      <value>0, 4, 1, 1</value>
     </param>
     <param>
       <key>notebook</key>
-      <value>displays, 1</value>
+      <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(593, 551)</value>
+      <value>(658, 122)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -915,10 +1245,10 @@
     </param>
   </block>
   <block>
-    <key>wxgui_fftsink2</key>
+    <key>wxgui_scopesink2</key>
     <param>
       <key>id</key>
-      <value>wxgui_fftsink2_1</value>
+      <value>wxgui_scopesink2_0_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -926,55 +1256,39 @@
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
+      <value>float</value>
     </param>
     <param>
       <key>title</key>
-      <value>Channel Spectrum</value>
+      <value>Baseband</value>
     </param>
     <param>
       <key>samp_rate</key>
       <value>channel_rate</value>
     </param>
     <param>
-      <key>baseband_freq</key>
-      <value>freq</value>
-    </param>
-    <param>
-      <key>y_per_div</key>
-      <value>10</value>
-    </param>
-    <param>
-      <key>y_divs</key>
-      <value>10</value>
-    </param>
-    <param>
-      <key>ref_level</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>ref_scale</key>
-      <value>65536</value>
+      <key>v_scale</key>
+      <value>1</value>
     </param>
     <param>
-      <key>fft_size</key>
-      <value>1024</value>
+      <key>t_scale</key>
+      <value>40.0/channel_rate</value>
     </param>
     <param>
-      <key>fft_rate</key>
-      <value>30</value>
+      <key>ac_couple</key>
+      <value>False</value>
     </param>
     <param>
-      <key>peak_hold</key>
+      <key>xy_mode</key>
       <value>False</value>
     </param>
     <param>
-      <key>average</key>
-      <value>False</value>
+      <key>num_inputs</key>
+      <value>1</value>
     </param>
     <param>
-      <key>avg_alpha</key>
-      <value>0</value>
+      <key>win_size</key>
+      <value></value>
     </param>
     <param>
       <key>grid_pos</key>
@@ -982,60 +1296,17 @@
     </param>
     <param>
       <key>notebook</key>
-      <value>displays, 0</value>
+      <value>displays, 1</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(344, 511)</value>
+      <value>(797, 601)</value>
     </param>
     <param>
       <key>_rotation</key>
       <value>180</value>
     </param>
   </block>
-  <block>
-    <key>variable_config</key>
-    <param>
-      <key>id</key>
-      <value>saved_channel</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>25</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>int</value>
-    </param>
-    <param>
-      <key>config_file</key>
-      <value>config_filename</value>
-    </param>
-    <param>
-      <key>section</key>
-      <value>gr-pager</value>
-    </param>
-    <param>
-      <key>option</key>
-      <value>channel</value>
-    </param>
-    <param>
-      <key>writeback</key>
-      <value>channel</value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(387, 312)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
   <connection>
     <source_block_id>gr_freq_xlating_fir_filter_xxx_0</source_block_id>
     <sink_block_id>wxgui_fftsink2_1</sink_block_id>
@@ -1060,4 +1331,22 @@
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
+  <connection>
+    <source_block_id>gr_freq_xlating_fir_filter_xxx_0</source_block_id>
+    <sink_block_id>fm_demod</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>fm_demod</source_block_id>
+    <sink_block_id>gr_moving_average_xx_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>gr_moving_average_xx_0</source_block_id>
+    <sink_block_id>wxgui_scopesink2_0_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
 </flow_graph>
diff --git a/gr-pager/apps/usrp_rx_flex.py b/gr-pager/apps/usrp_rx_flex.py
index 7d6345279..73b11f90c 100755
--- a/gr-pager/apps/usrp_rx_flex.py
+++ b/gr-pager/apps/usrp_rx_flex.py
@@ -2,7 +2,7 @@
 ##################################################
 # Gnuradio Python Flow Graph
 # Title: USRP FLEX Pager Receiver (Single Channel)
-# Generated: Sun Oct 11 14:15:06 2009
+# Generated: Sat Oct 17 11:46:38 2009
 ##################################################
 
 from gnuradio import eng_notation
@@ -16,7 +16,7 @@ from grc_gnuradio import usrp as grc_usrp
 from grc_gnuradio import wxgui as grc_wxgui
 from optparse import OptionParser
 import ConfigParser
-import os
+import os, math
 import wx
 
 class usrp_rx_flex(grc_wxgui.top_block_gui):
@@ -28,6 +28,7 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 		# Variables
 		##################################################
 		self.config_filename = config_filename = os.environ["HOME"]+"/.gnuradio/config.conf"
+		self.symbol_rate = symbol_rate = 3200
 		self._saved_channel_config = ConfigParser.ConfigParser()
 		self._saved_channel_config.read(config_filename)
 		try: saved_channel = self._saved_channel_config.getint("gr-pager", "channel")
@@ -38,10 +39,14 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 		try: saved_band_freq = self._saved_band_freq_config.getfloat("gr-pager", "band_center")
 		except: saved_band_freq = 930.5125e6
 		self.saved_band_freq = saved_band_freq
-		self.decim = decim = 16
+		self.deviation = deviation = 4800
+		self.decim = decim = 20
+		self.adc_rate = adc_rate = 64e6
+		self.sample_rate = sample_rate = adc_rate/decim
+		self.passband = passband = 2*(deviation+symbol_rate)
+		self.channel_rate = channel_rate = 8*3200
 		self.channel = channel = saved_channel
 		self.band_freq = band_freq = saved_band_freq
-		self.adc_rate = adc_rate = 64e6
 		self._saved_rx_gain_config = ConfigParser.ConfigParser()
 		self._saved_rx_gain_config.read(config_filename)
 		try: saved_rx_gain = self._saved_rx_gain_config.getint("gr-pager", "rx_gain")
@@ -52,13 +57,14 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 		try: saved_offset = self._saved_offset_config.getfloat("gr-pager", "freq_offset")
 		except: saved_offset = 0
 		self.saved_offset = saved_offset
-		self.sample_rate = sample_rate = adc_rate/decim
 		self.freq = freq = band_freq+(channel-61)*25e3
-		self.channel_rate = channel_rate = 25e3
+		self.channel_taps = channel_taps = firdes.low_pass(10, sample_rate, passband/2.0, (channel_rate-passband)/2.0)
 		self.rx_gain = rx_gain = saved_rx_gain
 		self.offset = offset = saved_offset
+		self.nchan_taps = nchan_taps = len(channel_taps)
+		self.ma_ntaps = ma_ntaps = channel_rate/symbol_rate
 		self.freq_text = freq_text = freq
-		self.channel_taps = channel_taps = firdes.low_pass(10**1, sample_rate, 10e3, 2.5e3)
+		self.demod_k = demod_k = 3*channel_rate/(2*math.pi*deviation)
 		self.channel_decim = channel_decim = int(sample_rate/channel_rate)
 
 		##################################################
@@ -79,7 +85,7 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 			value=self.channel,
 			callback=self.set_channel,
 			label="Channel",
-			converter=forms.float_converter(),
+			converter=forms.int_converter(),
 			proportion=0,
 		)
 		self._channel_slider = forms.slider(
@@ -91,7 +97,7 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 			maximum=120,
 			num_steps=119,
 			style=wx.SL_HORIZONTAL,
-			cast=float,
+			cast=int,
 			proportion=1,
 		)
 		self.GridAdd(_channel_sizer, 0, 1, 1, 1)
@@ -110,7 +116,7 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 			value=self.rx_gain,
 			callback=self.set_rx_gain,
 			label="Analog Gain",
-			converter=forms.float_converter(),
+			converter=forms.int_converter(),
 			proportion=0,
 		)
 		self._rx_gain_slider = forms.slider(
@@ -122,7 +128,7 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 			maximum=100,
 			num_steps=100,
 			style=wx.SL_HORIZONTAL,
-			cast=float,
+			cast=int,
 			proportion=1,
 		)
 		self.GridAdd(_rx_gain_sizer, 0, 4, 1, 1)
@@ -161,7 +167,9 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 		##################################################
 		# Blocks
 		##################################################
+		self.fm_demod = gr.quadrature_demod_cf(demod_k)
 		self.gr_freq_xlating_fir_filter_xxx_0 = gr.freq_xlating_fir_filter_ccc(channel_decim, (channel_taps), band_freq-freq+offset, sample_rate)
+		self.gr_moving_average_xx_0 = gr.moving_average_ff(8, 1.0/8.0, 4000)
 		self.usrp_source = grc_usrp.simple_source_c(which=0, side="A", rx_ant="RXA")
 		self.usrp_source.set_decim_rate(decim)
 		self.usrp_source.set_frequency(band_freq, verbose=True)
@@ -200,15 +208,26 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 		self.displays.GetPage(0).GridAdd(self.wxgui_fftsink2_1.win, 1, 0, 1, 1)
 		self.wxgui_scopesink2_0 = scopesink2.scope_sink_c(
 			self.displays.GetPage(1).GetWin(),
-			title="Baseband Waveform",
+			title="Channel Waveform",
 			sample_rate=channel_rate,
-			v_scale=1e3,
+			v_scale=8e3,
 			t_scale=20.0/channel_rate,
 			ac_couple=False,
 			xy_mode=False,
 			num_inputs=1,
 		)
 		self.displays.GetPage(1).GridAdd(self.wxgui_scopesink2_0.win, 0, 0, 1, 1)
+		self.wxgui_scopesink2_0_0 = scopesink2.scope_sink_f(
+			self.displays.GetPage(1).GetWin(),
+			title="Baseband",
+			sample_rate=channel_rate,
+			v_scale=1,
+			t_scale=40.0/channel_rate,
+			ac_couple=False,
+			xy_mode=False,
+			num_inputs=1,
+		)
+		self.displays.GetPage(1).GridAdd(self.wxgui_scopesink2_0_0.win, 1, 0, 1, 1)
 
 		##################################################
 		# Connections
@@ -217,6 +236,9 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 		self.connect((self.usrp_source, 0), (self.gr_freq_xlating_fir_filter_xxx_0, 0))
 		self.connect((self.usrp_source, 0), (self.wxgui_fftsink2_0, 0))
 		self.connect((self.gr_freq_xlating_fir_filter_xxx_0, 0), (self.wxgui_scopesink2_0, 0))
+		self.connect((self.gr_freq_xlating_fir_filter_xxx_0, 0), (self.fm_demod, 0))
+		self.connect((self.fm_demod, 0), (self.gr_moving_average_xx_0, 0))
+		self.connect((self.gr_moving_average_xx_0, 0), (self.wxgui_scopesink2_0_0, 0))
 
 	def set_config_filename(self, config_filename):
 		self.config_filename = config_filename
@@ -245,6 +267,11 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 		self._saved_rx_gain_config.set("gr-pager", "rx_gain", str(self.rx_gain))
 		self._saved_rx_gain_config.write(open(self.config_filename, 'w'))
 
+	def set_symbol_rate(self, symbol_rate):
+		self.symbol_rate = symbol_rate
+		self.set_ma_ntaps(self.channel_rate/self.symbol_rate)
+		self.set_passband(2*(self.deviation+self.symbol_rate))
+
 	def set_saved_channel(self, saved_channel):
 		self.saved_channel = saved_channel
 		self.set_channel(self.saved_channel)
@@ -253,11 +280,40 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 		self.saved_band_freq = saved_band_freq
 		self.set_band_freq(self.saved_band_freq)
 
+	def set_deviation(self, deviation):
+		self.deviation = deviation
+		self.set_demod_k(3*self.channel_rate/(2*math.pi*self.deviation))
+		self.set_passband(2*(self.deviation+self.symbol_rate))
+
 	def set_decim(self, decim):
 		self.decim = decim
 		self.set_sample_rate(self.adc_rate/self.decim)
 		self.usrp_source.set_decim_rate(self.decim)
 
+	def set_adc_rate(self, adc_rate):
+		self.adc_rate = adc_rate
+		self.set_sample_rate(self.adc_rate/self.decim)
+
+	def set_sample_rate(self, sample_rate):
+		self.sample_rate = sample_rate
+		self.wxgui_fftsink2_0.set_sample_rate(self.sample_rate)
+		self.set_channel_decim(int(self.sample_rate/self.channel_rate))
+		self.set_channel_taps(firdes.low_pass(10, self.sample_rate, self.passband/2.0, (self.channel_rate-self.passband)/2.0))
+
+	def set_passband(self, passband):
+		self.passband = passband
+		self.set_channel_taps(firdes.low_pass(10, self.sample_rate, self.passband/2.0, (self.channel_rate-self.passband)/2.0))
+
+	def set_channel_rate(self, channel_rate):
+		self.channel_rate = channel_rate
+		self.wxgui_scopesink2_0.set_sample_rate(self.channel_rate)
+		self.wxgui_fftsink2_1.set_sample_rate(self.channel_rate)
+		self.set_ma_ntaps(self.channel_rate/self.symbol_rate)
+		self.set_channel_decim(int(self.sample_rate/self.channel_rate))
+		self.set_demod_k(3*self.channel_rate/(2*math.pi*self.deviation))
+		self.set_channel_taps(firdes.low_pass(10, self.sample_rate, self.passband/2.0, (self.channel_rate-self.passband)/2.0))
+		self.wxgui_scopesink2_0_0.set_sample_rate(self.channel_rate)
+
 	def set_channel(self, channel):
 		self.channel = channel
 		self.set_freq(self.band_freq+(self.channel-61)*25e3)
@@ -275,19 +331,15 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 		self.set_freq(self.band_freq+(self.channel-61)*25e3)
 		self.wxgui_fftsink2_0.set_baseband_freq(self.band_freq)
 		self.usrp_source.set_frequency(self.band_freq)
+		self.gr_freq_xlating_fir_filter_xxx_0.set_center_freq(self.band_freq-self.freq+self.offset)
 		self._saved_band_freq_config = ConfigParser.ConfigParser()
 		self._saved_band_freq_config.read(self.config_filename)
 		if not self._saved_band_freq_config.has_section("gr-pager"):
 			self._saved_band_freq_config.add_section("gr-pager")
 		self._saved_band_freq_config.set("gr-pager", "band_center", str(self.band_freq))
 		self._saved_band_freq_config.write(open(self.config_filename, 'w'))
-		self.gr_freq_xlating_fir_filter_xxx_0.set_center_freq(self.band_freq-self.freq+self.offset)
 		self._band_freq_text_box.set_value(self.band_freq)
 
-	def set_adc_rate(self, adc_rate):
-		self.adc_rate = adc_rate
-		self.set_sample_rate(self.adc_rate/self.decim)
-
 	def set_saved_rx_gain(self, saved_rx_gain):
 		self.saved_rx_gain = saved_rx_gain
 		self.set_rx_gain(self.saved_rx_gain)
@@ -296,23 +348,16 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 		self.saved_offset = saved_offset
 		self.set_offset(self.saved_offset)
 
-	def set_sample_rate(self, sample_rate):
-		self.sample_rate = sample_rate
-		self.set_channel_decim(int(self.sample_rate/self.channel_rate))
-		self.set_channel_taps(firdes.low_pass(10**1, self.sample_rate, 10e3, 2.5e3))
-		self.wxgui_fftsink2_0.set_sample_rate(self.sample_rate)
-
 	def set_freq(self, freq):
 		self.freq = freq
-		self.wxgui_fftsink2_1.set_baseband_freq(self.freq)
 		self.gr_freq_xlating_fir_filter_xxx_0.set_center_freq(self.band_freq-self.freq+self.offset)
+		self.wxgui_fftsink2_1.set_baseband_freq(self.freq)
 		self.set_freq_text(self.freq)
 
-	def set_channel_rate(self, channel_rate):
-		self.channel_rate = channel_rate
-		self.set_channel_decim(int(self.sample_rate/self.channel_rate))
-		self.wxgui_fftsink2_1.set_sample_rate(self.channel_rate)
-		self.wxgui_scopesink2_0.set_sample_rate(self.channel_rate)
+	def set_channel_taps(self, channel_taps):
+		self.channel_taps = channel_taps
+		self.gr_freq_xlating_fir_filter_xxx_0.set_taps((self.channel_taps))
+		self.set_nchan_taps(len(self.channel_taps))
 
 	def set_rx_gain(self, rx_gain):
 		self.rx_gain = rx_gain
@@ -328,23 +373,28 @@ class usrp_rx_flex(grc_wxgui.top_block_gui):
 
 	def set_offset(self, offset):
 		self.offset = offset
+		self.gr_freq_xlating_fir_filter_xxx_0.set_center_freq(self.band_freq-self.freq+self.offset)
 		self._saved_offset_config = ConfigParser.ConfigParser()
 		self._saved_offset_config.read(self.config_filename)
 		if not self._saved_offset_config.has_section("gr-pager"):
 			self._saved_offset_config.add_section("gr-pager")
 		self._saved_offset_config.set("gr-pager", "freq_offset", str(self.offset))
 		self._saved_offset_config.write(open(self.config_filename, 'w'))
-		self.gr_freq_xlating_fir_filter_xxx_0.set_center_freq(self.band_freq-self.freq+self.offset)
 		self._offset_slider.set_value(self.offset)
 		self._offset_text_box.set_value(self.offset)
 
+	def set_nchan_taps(self, nchan_taps):
+		self.nchan_taps = nchan_taps
+
+	def set_ma_ntaps(self, ma_ntaps):
+		self.ma_ntaps = ma_ntaps
+
 	def set_freq_text(self, freq_text):
 		self.freq_text = freq_text
 		self._freq_text_static_text.set_value(self.freq_text)
 
-	def set_channel_taps(self, channel_taps):
-		self.channel_taps = channel_taps
-		self.gr_freq_xlating_fir_filter_xxx_0.set_taps((self.channel_taps))
+	def set_demod_k(self, demod_k):
+		self.demod_k = demod_k
 
 	def set_channel_decim(self, channel_decim):
 		self.channel_decim = channel_decim