Added capability to receive multiple channels of a single BTS to the receiver. It is now possible to receive bursts on channels for which frequency hopping was used. Changed examples to work without hierarhical GSM Receiver block.

1 files changed, 27 insertions, 20 deletions

diff --git a/python/misc_utils/clock_offset_corrector.py b/python/misc_utils/clock_offset_corrector.py
index 807e6cc..0633ae5 100644
--- a/python/misc_utils/clock_offset_corrector.py
+++ b/python/misc_utils/clock_offset_corrector.py
@@ -3,7 +3,7 @@
 # Gnuradio Python Flow Graph
 # Title: Clock offset corrector
 # Author: Piotr Krysik
-# Generated: Wed Aug 13 16:43:12 2014
+# Generated: Thu Nov  6 10:22:24 2014
 ##################################################
 
 from gnuradio import blocks
@@ -15,7 +15,7 @@ import math
 
 class clock_offset_corrector(gr.hier_block2):
 
-    def __init__(self, fc=936.6e6, ppm=0, samp_rate_in=1625000.0/6.0*4.0, samp_rate_out=1625000.0/6.0*4.0):
+    def __init__(self, fc=936.6e6, samp_rate_in=1625000.0/6.0*4.0, samp_rate_out=1625000.0/6.0*4.0, ppm=0):
         gr.hier_block2.__init__(
             self, "Clock offset corrector",
             gr.io_signature(1, 1, gr.sizeof_gr_complex*1),
@@ -26,9 +26,9 @@ class clock_offset_corrector(gr.hier_block2):
         # Parameters
         ##################################################
         self.fc = fc
-        self.ppm = ppm
         self.samp_rate_in = samp_rate_in
         self.samp_rate_out = samp_rate_out
+        self.ppm = ppm
 
         ##################################################
         # Blocks
@@ -36,7 +36,8 @@ class clock_offset_corrector(gr.hier_block2):
         self.ppm_in = None;self.message_port_register_hier_out("ppm_in")
         self.gsm_controlled_rotator_cc_0 = gsm.controlled_rotator_cc(0,samp_rate_out)
         self.gsm_controlled_const_source_f_0 = gsm.controlled_const_source_f(ppm)
-        self.fractional_resampler_xx_0 = filter.fractional_resampler_cc(0, 1)
+        self.fractional_resampler_xx_0_0 = filter.fractional_resampler_ff(0, samp_rate_in/samp_rate_out)
+        self.fractional_resampler_xx_0 = filter.fractional_resampler_cc(0, samp_rate_in/samp_rate_out)
         self.blocks_multiply_const_vxx_0_0 = blocks.multiply_const_vff((1.0e-6*samp_rate_in/samp_rate_out, ))
         self.blocks_multiply_const_vxx_0 = blocks.multiply_const_vff((fc/samp_rate_out*(2*math.pi)/1e6, ))
         self.blocks_add_const_vxx_0 = blocks.add_const_vff((samp_rate_in/samp_rate_out, ))
@@ -44,14 +45,16 @@ class clock_offset_corrector(gr.hier_block2):
         ##################################################
         # Connections
         ##################################################
-        self.connect((self.blocks_add_const_vxx_0, 0), (self.fractional_resampler_xx_0, 1))
-        self.connect((self.blocks_multiply_const_vxx_0, 0), (self.gsm_controlled_rotator_cc_0, 1))
-        self.connect((self.fractional_resampler_xx_0, 0), (self.gsm_controlled_rotator_cc_0, 0))
-        self.connect((self.gsm_controlled_rotator_cc_0, 0), (self, 0))
+        self.connect((self.gsm_controlled_const_source_f_0, 0), (self.blocks_multiply_const_vxx_0, 0))
         self.connect((self, 0), (self.fractional_resampler_xx_0, 0))
-        self.connect((self.blocks_multiply_const_vxx_0_0, 0), (self.blocks_add_const_vxx_0, 0))
+        self.connect((self.blocks_multiply_const_vxx_0, 0), (self.fractional_resampler_xx_0_0, 0))
+        self.connect((self.blocks_add_const_vxx_0, 0), (self.fractional_resampler_xx_0_0, 1))
+        self.connect((self.gsm_controlled_rotator_cc_0, 0), (self, 0))
+        self.connect((self.fractional_resampler_xx_0, 0), (self.gsm_controlled_rotator_cc_0, 0))
+        self.connect((self.blocks_add_const_vxx_0, 0), (self.fractional_resampler_xx_0, 1))
         self.connect((self.gsm_controlled_const_source_f_0, 0), (self.blocks_multiply_const_vxx_0_0, 0))
-        self.connect((self.gsm_controlled_const_source_f_0, 0), (self.blocks_multiply_const_vxx_0, 0))
+        self.connect((self.blocks_multiply_const_vxx_0_0, 0), (self.blocks_add_const_vxx_0, 0))
+        self.connect((self.fractional_resampler_xx_0_0, 0), (self.gsm_controlled_rotator_cc_0, 1))
 
         ##################################################
         # Asynch Message Connections
@@ -66,28 +69,32 @@ class clock_offset_corrector(gr.hier_block2):
         self.fc = fc
         self.blocks_multiply_const_vxx_0.set_k((self.fc/self.samp_rate_out*(2*math.pi)/1e6, ))
 
-    def get_ppm(self):
-        return self.ppm
-
-    def set_ppm(self, ppm):
-        self.ppm = ppm
-        self.gsm_controlled_const_source_f_0.set_constant(self.ppm)
-
     def get_samp_rate_in(self):
         return self.samp_rate_in
 
     def set_samp_rate_in(self, samp_rate_in):
         self.samp_rate_in = samp_rate_in
-        self.blocks_add_const_vxx_0.set_k((self.samp_rate_in/self.samp_rate_out, ))
+        self.fractional_resampler_xx_0.set_resamp_ratio(self.samp_rate_in/self.samp_rate_out)
+        self.fractional_resampler_xx_0_0.set_resamp_ratio(self.samp_rate_in/self.samp_rate_out)
         self.blocks_multiply_const_vxx_0_0.set_k((1.0e-6*self.samp_rate_in/self.samp_rate_out, ))
+        self.blocks_add_const_vxx_0.set_k((self.samp_rate_in/self.samp_rate_out, ))
 
     def get_samp_rate_out(self):
         return self.samp_rate_out
 
     def set_samp_rate_out(self, samp_rate_out):
         self.samp_rate_out = samp_rate_out
+        self.fractional_resampler_xx_0.set_resamp_ratio(self.samp_rate_in/self.samp_rate_out)
+        self.gsm_controlled_rotator_cc_0.set_samp_rate(self.samp_rate_out)
         self.blocks_multiply_const_vxx_0.set_k((self.fc/self.samp_rate_out*(2*math.pi)/1e6, ))
-        self.blocks_add_const_vxx_0.set_k((self.samp_rate_in/self.samp_rate_out, ))
+        self.fractional_resampler_xx_0_0.set_resamp_ratio(self.samp_rate_in/self.samp_rate_out)
         self.blocks_multiply_const_vxx_0_0.set_k((1.0e-6*self.samp_rate_in/self.samp_rate_out, ))
-        self.gsm_controlled_rotator_cc_0.set_samp_rate(self.samp_rate_out)
+        self.blocks_add_const_vxx_0.set_k((self.samp_rate_in/self.samp_rate_out, ))
+
+    def get_ppm(self):
+        return self.ppm
+
+    def set_ppm(self, ppm):
+        self.ppm = ppm
+        self.gsm_controlled_const_source_f_0.set_constant(self.ppm)