X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=gnuradio-core%2Fsrc%2Flib%2Fhier%2Fgr_channel_model.cc;fp=gnuradio-core%2Fsrc%2Flib%2Fhier%2Fgr_channel_model.cc;h=fb57e808a1a05b62d5d5b5d6d2c0f605cf15f329;hb=ea29b08aeb54227e6628f655ccfdb96fe4d8c378;hp=0000000000000000000000000000000000000000;hpb=09a1e803a9e6587c78d20cdf16891e5295874668;p=debian%2Fgnuradio

diff --git a/gnuradio-core/src/lib/hier/gr_channel_model.cc b/gnuradio-core/src/lib/hier/gr_channel_model.cc
new file mode 100644
index 00000000..fb57e808
--- /dev/null
+++ b/gnuradio-core/src/lib/hier/gr_channel_model.cc
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2009 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 <gr_channel_model.h>
+#include <gr_io_signature.h>
+#include <gr_sig_source_f.h>
+#include <iostream>
+
+// Shared pointer constructor
+gr_channel_model_sptr
+gr_make_channel_model(double noise_voltage,
+		      double frequency_offset,
+		      double epsilon,
+		      const std::vector<gr_complex> &taps,
+		      double noise_seed)
+{
+  return gnuradio::get_initial_sptr(new gr_channel_model(noise_voltage,
+							 frequency_offset,
+							 epsilon,
+							 taps,
+							 noise_seed));
+}
+
+// Hierarchical block constructor
+gr_channel_model::gr_channel_model(double noise_voltage,
+				   double frequency_offset,
+				   double epsilon,
+				   const std::vector<gr_complex> &taps,
+				   double noise_seed)
+  : gr_hier_block2("gr_channel_model",
+		   gr_make_io_signature(1, 1, sizeof(gr_complex)), 
+		   gr_make_io_signature(1, 1, sizeof(gr_complex)))
+{
+  d_taps = taps;
+  while(d_taps.size() < 2) {
+    d_taps.push_back(0);
+  }
+  
+  d_timing_offset = gr_make_fractional_interpolator_cc(0, epsilon);
+  
+  d_multipath = gr_make_fir_filter_ccc(1, d_taps);
+  
+  d_noise_adder = gr_make_add_cc();
+  d_noise = gr_make_noise_source_c(GR_GAUSSIAN, noise_voltage, noise_seed);
+  d_freq_offset = gr_make_sig_source_c(1, GR_SIN_WAVE, frequency_offset, 1.0, 0.0);
+  d_mixer_offset = gr_make_multiply_cc();
+  
+  connect(self(), 0, d_timing_offset, 0);
+  connect(d_timing_offset, 0, d_multipath, 0);
+  connect(d_multipath, 0, d_mixer_offset, 0);
+  connect(d_freq_offset, 0, d_mixer_offset, 1);
+  connect(d_mixer_offset, 0, d_noise_adder, 1);
+  connect(d_noise, 0, d_noise_adder, 0);
+  connect(d_noise_adder, 0, self(), 0);
+}
+
+void
+gr_channel_model::set_noise_voltage(double noise_voltage)
+{
+  d_noise->set_amplitude(noise_voltage);
+}
+   
+void
+gr_channel_model::set_frequency_offset(double frequency_offset)
+{
+  d_freq_offset->set_frequency(frequency_offset);
+}
+     
+void
+gr_channel_model::set_taps(const std::vector<gr_complex> &taps)
+{
+  d_taps = taps;
+  while(d_taps.size() < 2) {
+    d_taps.push_back(0);
+  }
+  d_multipath->set_taps(d_taps);
+}
+
+void
+gr_channel_model::set_timing_offset(double epsilon)
+{
+  d_timing_offset->set_interp_ratio(epsilon);
+}