--- /dev/null
+<?xml version="1.0"?>
+<!--
+###################################################
+##Correlate Access Code
+###################################################
+ -->
+<block>
+ <name>Correlate Access Code</name>
+ <key>gr_correlate_access_code_bb</key>
+ <import>from gnuradio import gr</import>
+ <make>gr.correlate_access_code_bb($access_code, $threshold)</make>
+ <param>
+ <name>Access Code</name>
+ <key>access_code</key>
+ <value>101010</value>
+ <type>string</type>
+ </param>
+ <param>
+ <name>Threshold</name>
+ <key>threshold</key>
+ <type>int</type>
+ </param>
+ <sink>
+ <name>in</name>
+ <type>byte</type>
+ </sink>
+ <source>
+ <name>out</name>
+ <type>byte</type>
+ </source>
+</block>