+<?xml version="1.0"?>
+<!--
+###################################################
+##Channel Model
+###################################################
+ -->
+<block>
+ <name>Channel Model</name>
+ <key>gr_channel_model</key>
+ <import>from gnuradio import gr</import>
+ <import>from gnuradio.gr import firdes</import>
+ <make>gr.channel_model(
+ noise_voltage=$noise_voltage,
+ frequency_offset=$freq_offset,
+ epsilon=$epsilon,
+ taps=$taps,
+ noise_seed=$seed,
+)</make>
+ <callback>set_noise_voltage($noise_voltage)</callback>
+ <callback>set_frequency_offset($freq_offset)</callback>
+ <callback>set_taps($taps)</callback>
+ <callback>set_timing_offset($epsilon)</callback>
+ <param>
+ <name>Noise Voltage</name>
+ <key>noise_voltage</key>
+ <value>0.0</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Frequency Offset</name>
+ <key>freq_offset</key>
+ <value>0.0</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Epsilon</name>
+ <key>epsilon</key>
+ <value>1.0</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Taps</name>
+ <key>taps</key>
+ <value>1.0 + 1.0j</value>
+ <type>complex_vector</type>
+ </param>
+ <param>
+ <name>Seed</name>
+ <key>seed</key>
+ <value>42</value>
+ <type>int</type>
+ </param>
+ <sink>
+ <name>in</name>
+ <type>complex</type>
+ </sink>
+ <source>
+ <name>out</name>
+ <type>complex</type>
+ </source>
+</block>