--- /dev/null
+/*
+ * 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_top_block.h>
+#include <gr_fractional_interpolator_cc.h>
+#include <gr_sig_source_c.h>
+#include <gr_fir_filter_ccc.h>
+#include <gr_add_cc.h>
+#include <gr_noise_source_c.h>
+#include <gr_multiply_cc.h>
+
+class gr_channel_model;
+typedef boost::shared_ptr<gr_channel_model> gr_channel_model_sptr;
+
+
+gr_channel_model_sptr gr_make_channel_model(double noise_voltage=0.0,
+ double frequency_offset=0.0,
+ double epsilon=1.0,
+ const std::vector<gr_complex> &taps=std::vector<gr_complex>(1, 1),
+ double noise_seed=3021);
+
+/*!
+ * \brief channel simulator
+ * \ingroup misc_blk
+ */
+class gr_channel_model : public gr_hier_block2
+{
+ private:
+ gr_channel_model(double noise_voltage,
+ double frequency_offset,
+ double epsilon,
+ const std::vector<gr_complex> &taps,
+ double noise_seed);
+
+ friend 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);
+
+ gr_fractional_interpolator_cc_sptr d_timing_offset;
+ gr_sig_source_c_sptr d_freq_offset;
+ gr_fir_filter_ccc_sptr d_multipath;
+ gr_add_cc_sptr d_noise_adder;
+ gr_noise_source_c_sptr d_noise;
+ gr_multiply_cc_sptr d_mixer_offset;
+
+ std::vector<gr_complex> d_taps;
+
+ public:
+ void set_noise_voltage(double noise_voltage);
+ void set_frequency_offset(double frequency_offset);
+ void set_taps(const std::vector<gr_complex> &taps);
+ void set_timing_offset(double epsilon);
+};