diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
new file mode 100644
index 0000000..7d68803
--- /dev/null
+++ b/python/CMakeLists.txt
@@ -0,0 +1,45 @@
+# Copyright 2011 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+########################################################################
+# Include python install macros
+########################################################################
+include(GrPython)
+if(NOT PYTHONINTERP_FOUND)
+    return()
+endif()
+
+########################################################################
+# Install python sources
+########################################################################
+GR_PYTHON_INSTALL(
+    FILES
+    __init__.py
+    receiver_hier.py DESTINATION ${GR_PYTHON_DIR}/gsm
+)
+
+########################################################################
+# Handle the unit tests
+########################################################################
+include(GrTest)
+
+set(GR_TEST_TARGET_DEPS gnuradio-gsm)
+set(GR_TEST_PYTHON_DIRS ${CMAKE_BINARY_DIR}/swig)
+GR_ADD_TEST(qa_receiver ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/qa_receiver.py)
+GR_ADD_TEST(qa_receiver_hier ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/qa_receiver_hier.py)
diff --git a/python/__init__.py b/python/__init__.py
new file mode 100644
index 0000000..d6dec38
--- /dev/null
+++ b/python/__init__.py
@@ -0,0 +1,55 @@
+#
+# Copyright 2008,2009 Free Software Foundation, Inc.
+#
+# This application is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This application is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+
+# The presence of this file turns this directory into a Python package
+
+'''
+This is the GNU Radio GSM module. Place your Python package
+description here (python/__init__.py).
+'''
+
+# ----------------------------------------------------------------
+# Temporary workaround for ticket:181 (swig+python problem)
+import sys
+_RTLD_GLOBAL = 0
+try:
+    from dl import RTLD_GLOBAL as _RTLD_GLOBAL
+except ImportError:
+    try:
+	from DLFCN import RTLD_GLOBAL as _RTLD_GLOBAL
+    except ImportError:
+	pass
+
+if _RTLD_GLOBAL != 0:
+    _dlopenflags = sys.getdlopenflags()
+    sys.setdlopenflags(_dlopenflags|_RTLD_GLOBAL)
+# ----------------------------------------------------------------
+
+
+# import swig generated symbols into the gsm namespace
+from gsm_swig import *
+
+# import any pure python here
+from receiver_hier import receiver_hier
+#
+
+# ----------------------------------------------------------------
+# Tail of workaround
+if _RTLD_GLOBAL != 0:
+    sys.setdlopenflags(_dlopenflags)      # Restore original flags
+# ----------------------------------------------------------------
diff --git a/python/build_utils.py b/python/build_utils.py
new file mode 100644
index 0000000..cf58a97
--- /dev/null
+++ b/python/build_utils.py
@@ -0,0 +1,226 @@
+#
+# Copyright 2004,2009,2012 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+"""Misc utilities used at build time
+"""
+
+import re, os, os.path
+from build_utils_codes import *
+
+
+# set srcdir to the directory that contains Makefile.am
+try:
+    srcdir = os.environ['srcdir']
+except KeyError, e:
+    srcdir = "."
+srcdir = srcdir + '/'
+
+# set do_makefile to either true or false dependeing on the environment
+try:
+    if os.environ['do_makefile'] == '0':
+        do_makefile = False
+    else:
+        do_makefile = True
+except KeyError, e:
+    do_makefile = False
+
+# set do_sources to either true or false dependeing on the environment
+try:
+    if os.environ['do_sources'] == '0':
+        do_sources = False
+    else:
+        do_sources = True
+except KeyError, e:
+    do_sources = True
+
+name_dict = {}
+
+def log_output_name (name):
+    (base, ext) = os.path.splitext (name)
+    ext = ext[1:]                       # drop the leading '.'
+
+    entry = name_dict.setdefault (ext, [])
+    entry.append (name)
+
+def open_and_log_name (name, dir):
+    global do_sources
+    if do_sources:
+        f = open (name, dir)
+    else:
+        f = None
+    log_output_name (name)
+    return f
+
+def expand_template (d, template_filename, extra = ""):
+    '''Given a dictionary D and a TEMPLATE_FILENAME, expand template into output file
+    '''
+    global do_sources
+    output_extension = extract_extension (template_filename)
+    template = open_src (template_filename, 'r')
+    output_name = d['NAME'] + extra + '.' + output_extension
+    log_output_name (output_name)
+    if do_sources:
+        output = open (output_name, 'w')
+        do_substitution (d, template, output)
+        output.close ()
+    template.close ()
+
+def output_glue (dirname):
+    output_makefile_fragment ()
+    output_ifile_include (dirname)
+
+def output_makefile_fragment ():
+    global do_makefile
+    if not do_makefile:
+        return
+# overwrite the source, which must be writable; this should have been
+# checked for beforehand in the top-level Makefile.gen.gen .
+    f = open (os.path.join (os.environ.get('gendir', os.environ.get('srcdir', '.')), 'Makefile.gen'), 'w')
+    f.write ('#\n# This file is machine generated.  All edits will be overwritten\n#\n')
+    output_subfrag (f, 'h')
+    output_subfrag (f, 'i')
+    output_subfrag (f, 'cc')
+    f.close ()
+
+def output_ifile_include (dirname):
+    global do_sources
+    if do_sources:
+        f = open ('%s_generated.i' % (dirname,), 'w')
+        f.write ('//\n// This file is machine generated.  All edits will be overwritten\n//\n')
+        files = name_dict.setdefault ('i', [])
+        files.sort ()
+        f.write ('%{\n')
+        for file in files:
+            f.write ('#include <%s>\n' % (file[0:-1] + 'h',))
+        f.write ('%}\n\n')
+        for file in files:
+            f.write ('%%include <%s>\n' % (file,))
+
+def output_subfrag (f, ext):
+    files = name_dict.setdefault (ext, [])
+    files.sort ()
+    f.write ("GENERATED_%s =" % (ext.upper ()))
+    for file in files:
+        f.write (" \\\n\t%s" % (file,))
+    f.write ("\n\n")
+
+def extract_extension (template_name):
+    # template name is something like: GrFIRfilterXXX.h.t
+    # we return everything between the penultimate . and .t
+    mo = re.search (r'\.([a-z]+)\.t$', template_name)
+    if not mo:
+        raise ValueError, "Incorrectly formed template_name '%s'" % (template_name,)
+    return mo.group (1)
+
+def open_src (name, mode):
+    global srcdir
+    return open (os.path.join (srcdir, name), mode)
+
+def do_substitution (d, in_file, out_file):
+    def repl (match_obj):
+        key = match_obj.group (1)
+        # print key
+        return d[key]
+
+    inp = in_file.read ()
+    out = re.sub (r"@([a-zA-Z0-9_]+)@", repl, inp)
+    out_file.write (out)
+
+
+
+copyright = '''/* -*- c++ -*- */
+/*
+ * Copyright 2003,2004 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+'''
+
+def is_complex (code3):
+    if i_code (code3) == 'c' or o_code (code3) == 'c':
+        return '1'
+    else:
+        return '0'
+
+
+def standard_dict (name, code3, package='gr'):
+    d = {}
+    d['NAME'] = name
+    d['NAME_IMPL'] = name+'_impl'
+    d['GUARD_NAME'] = 'INCLUDED_%s_%s_H' % (package.upper(), name.upper())
+    d['GUARD_NAME_IMPL'] = 'INCLUDED_%s_%s_IMPL_H' % (package.upper(), name.upper())
+    d['BASE_NAME'] = re.sub ('^' + package + '_', '', name)
+    d['SPTR_NAME'] = '%s_sptr' % name
+    d['WARNING'] = 'WARNING: this file is machine generated. Edits will be overwritten'
+    d['COPYRIGHT'] = copyright
+    d['TYPE'] = i_type (code3)
+    d['I_TYPE'] = i_type (code3)
+    d['O_TYPE'] = o_type (code3)
+    d['TAP_TYPE'] = tap_type (code3)
+    d['IS_COMPLEX'] = is_complex (code3)
+    return d
+
+
+def standard_dict2 (name, code3, package):
+    d = {}
+    d['NAME'] = name
+    d['BASE_NAME'] = name
+    d['GUARD_NAME'] = 'INCLUDED_%s_%s_H' % (package.upper(), name.upper())
+    d['WARNING'] = 'WARNING: this file is machine generated. Edits will be overwritten'
+    d['COPYRIGHT'] = copyright
+    d['TYPE'] = i_type (code3)
+    d['I_TYPE'] = i_type (code3)
+    d['O_TYPE'] = o_type (code3)
+    d['TAP_TYPE'] = tap_type (code3)
+    d['IS_COMPLEX'] = is_complex (code3)
+    return d
+
+def standard_impl_dict2 (name, code3, package):
+    d = {}
+    d['NAME'] = name
+    d['IMPL_NAME'] = name
+    d['BASE_NAME'] = name.rstrip("impl").rstrip("_")
+    d['GUARD_NAME'] = 'INCLUDED_%s_%s_H' % (package.upper(), name.upper())
+    d['WARNING'] = 'WARNING: this file is machine generated. Edits will be overwritten'
+    d['COPYRIGHT'] = copyright
+    d['FIR_TYPE'] = "fir_filter_" + code3
+    d['CFIR_TYPE'] = "fir_filter_" + code3[0:2] + 'c'
+    d['TYPE'] = i_type (code3)
+    d['I_TYPE'] = i_type (code3)
+    d['O_TYPE'] = o_type (code3)
+    d['TAP_TYPE'] = tap_type (code3)
+    d['IS_COMPLEX'] = is_complex (code3)
+    return d
diff --git a/python/build_utils_codes.py b/python/build_utils_codes.py
new file mode 100644
index 0000000..9ea96ba
--- /dev/null
+++ b/python/build_utils_codes.py
@@ -0,0 +1,52 @@
+#
+# Copyright 2004 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+def i_code (code3):
+    return code3[0]
+
+def o_code (code3):
+    if len (code3) >= 2:
+        return code3[1]
+    else:
+        return code3[0]
+
+def tap_code (code3):
+    if len (code3) >= 3:
+        return code3[2]
+    else:
+        return code3[0]
+
+def i_type (code3):
+    return char_to_type[i_code (code3)]
+
+def o_type (code3):
+    return char_to_type[o_code (code3)]
+
+def tap_type (code3):
+    return char_to_type[tap_code (code3)]
+
+
+char_to_type = {}
+char_to_type['s'] = 'short'
+char_to_type['i'] = 'int'
+char_to_type['f'] = 'float'
+char_to_type['c'] = 'gr_complex'
+char_to_type['b'] = 'unsigned char'
diff --git a/python/cfile b/python/cfile
new file mode 100644
index 0000000..943e35f
--- /dev/null
+++ b/python/cfile
Binary files differ
diff --git a/python/cfile2.out b/python/cfile2.out
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/python/cfile2.out
diff --git a/python/receiver_hier.py b/python/receiver_hier.py
new file mode 100755
index 0000000..1737d41
--- /dev/null
+++ b/python/receiver_hier.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+
+import gsm
+from gnuradio.eng_option import eng_option
+from gnuradio import gr, gru, blocks
+from gnuradio import filter
+
+
+class tuner(gr.feval_dd):
+    def __init__(self, top_block):
+        gr.feval_dd.__init__(self)
+        self.top_block = top_block
+    def eval(self, freq_offet):
+        self.top_block.set_center_frequency(freq_offet)
+        return freq_offet
+
+class receiver_hier(gr.hier_block2):
+    def __init__(self, input_rate, osr=4):
+        gr.hier_block2.__init__(self, 
+                                "receiver_hier",
+                                gr.io_signature(1, 1, gr.sizeof_gr_complex),
+                                gr.io_signature(1, 1, 142*gr.sizeof_float))
+        #set rates
+        gsm_symb_rate = 1625000/6.0
+        self.input_rate = input_rate
+        self.osr = osr
+        self.sps = input_rate / gsm_symb_rate / osr
+
+        #create callbacks
+        self.tuner_callback = tuner(self)
+        #create accompaning blocks
+        self.filtr = self._set_filter()
+        self.interpolator = self._set_interpolator()
+        self.receiver = self._set_receiver()
+        self.connect(self, self.filtr,  self.interpolator, self.receiver,  self)
+
+    def _set_filter(self):
+        filter_cutoff   = 125e3	
+        filter_t_width  = 10e3
+        offset = 0
+
+        filter_taps    = filter.firdes.low_pass(1.0, self.input_rate, filter_cutoff, filter_t_width, filter.firdes.WIN_HAMMING)
+        filtr          = filter.freq_xlating_fir_filter_ccf(1, filter_taps, offset, self.input_rate)
+        return filtr
+    
+    def _set_interpolator(self):
+        interpolator = filter.fractional_resampler_cc(0, self.sps) 
+        return interpolator
+    
+    def _set_receiver(self):
+        receiver = gsm.receiver(self.tuner_callback, self.osr)
+        return receiver
+
+    def set_center_frequency(self, center_freq):
+        self.filtr.set_center_freq(center_freq)
+
+    def set_timing(self, timing_offset):
+        pass
+        
diff --git a/python/receiver_hier.pyc b/python/receiver_hier.pyc
new file mode 100644
index 0000000..87bf0d6
--- /dev/null
+++ b/python/receiver_hier.pyc
Binary files differ