GRC file for gsm gmsk mod
diff --git a/hier_blocks/transmitter/gsm_gmsk_mod.grc b/hier_blocks/transmitter/gsm_gmsk_mod.grc
new file mode 100644
index 0000000..4f9041b
--- /dev/null
+++ b/hier_blocks/transmitter/gsm_gmsk_mod.grc
@@ -0,0 +1,621 @@
+<?xml version='1.0' encoding='utf-8'?>
+<?grc format='1' created='3.7.9'?>
+<flow_graph>
+ <timestamp>Wed Sep 20 07:48:30 2017</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>author</key>
+ <value>Piotr Krysik</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value></value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Modulators</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>GMSK Modulator for GSM</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(8, 8)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>hb</value>
+ </param>
+ <param>
+ <key>hier_block_src_path</key>
+ <value>.:</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>gsm_gmsk_mod</value>
+ </param>
+ <param>
+ <key>max_nouts</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>qt_qss_theme</key>
+ <value></value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>run_command</key>
+ <value>{python} -u {filename}</value>
+ </param>
+ <param>
+ <key>run_options</key>
+ <value>prompt</value>
+ </param>
+ <param>
+ <key>run</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>thread_safe_setters</key>
+ <value></value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>GMSK Modulator for GSM</value>
+ </param>
+ </block>
+ <block>
+ <key>parameter</key>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(504, 15)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>BT</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>3 dB Time-Bandwidth Product</value>
+ </param>
+ <param>
+ <key>short_id</key>
+ <value></value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>eng_float</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>4</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_float_to_char</key>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(472, 204)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>blocks_float_to_char_0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>scale</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_tagged_stream_multiply_length</key>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(848, 209)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>blocks_tagged_stream_multiply_length_0</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>c</key>
+ <value>sps</value>
+ </param>
+ <param>
+ <key>lengthtagname</key>
+ <value>packet_len</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ </block>
+ <block>
+ <key>digital_chunks_to_symbols_xx</key>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>dimension</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(296, 197)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>digital_chunks_to_symbols_xx_0</value>
+ </param>
+ <param>
+ <key>in_type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>num_ports</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>out_type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>symbol_table</key>
+ <value>[1,-1]</value>
+ </param>
+ </block>
+ <block>
+ <key>digital_diff_decoder_bb</key>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(120, 204)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>digital_diff_decoder_bb_0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>modulus</key>
+ <value>2</value>
+ </param>
+ </block>
+ <block>
+ <key>digital_gmskmod_bc</key>
+ <param>
+ <key>bt</key>
+ <value>BT</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(616, 190)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>digital_gmskmod_bc_0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>L</key>
+ <value>pulse_duration</value>
+ </param>
+ <param>
+ <key>samples_per_symbol</key>
+ <value>sps</value>
+ </param>
+ </block>
+ <block>
+ <key>import</key>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(712, 28)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>import_0</value>
+ </param>
+ <param>
+ <key>import</key>
+ <value>from gnuradio.analog import cpm</value>
+ </param>
+ </block>
+ <block>
+ <key>pad_sink</key>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1136, 220)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>pad_sink_0</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>out</value>
+ </param>
+ <param>
+ <key>num_streams</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>optional</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ </block>
+ <block>
+ <key>pad_source</key>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(0, 204)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>pad_source_0</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>in</value>
+ </param>
+ <param>
+ <key>num_streams</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>optional</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ </block>
+ <block>
+ <key>parameter</key>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(376, 14)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>pulse_duration</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Pulse Duration</value>
+ </param>
+ <param>
+ <key>short_id</key>
+ <value></value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>eng_float</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>4</value>
+ </param>
+ </block>
+ <block>
+ <key>parameter</key>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(240, 15)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>id</key>
+ <value>sps</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Samples/Symbol</value>
+ </param>
+ <param>
+ <key>short_id</key>
+ <value></value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>intx</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>4</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>blocks_float_to_char_0</source_block_id>
+ <sink_block_id>digital_gmskmod_bc_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_tagged_stream_multiply_length_0</source_block_id>
+ <sink_block_id>pad_sink_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_chunks_to_symbols_xx_0</source_block_id>
+ <sink_block_id>blocks_float_to_char_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_diff_decoder_bb_0</source_block_id>
+ <sink_block_id>digital_chunks_to_symbols_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_gmskmod_bc_0</source_block_id>
+ <sink_block_id>blocks_tagged_stream_multiply_length_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>pad_source_0</source_block_id>
+ <sink_block_id>digital_diff_decoder_bb_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>