From ccea950c146d2f724fb37f18e27fc2857d191cfe Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Sat, 12 Apr 2008 20:03:11 +0000
Subject: Addes gr.cpfsk_bc(), a continuous phase frequency shift keying
modulator block.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@8193 221aa14e-8319-0410-a670-987f0aec2ac5
---
gnuradio-core/src/lib/general/Makefile.am | 5 +-
gnuradio-core/src/lib/general/general.i | 4 +-
gnuradio-core/src/lib/general/gr_cpfsk_bc.cc | 78 ++++++++++++++++++++++++++++
gnuradio-core/src/lib/general/gr_cpfsk_bc.h | 63 ++++++++++++++++++++++
gnuradio-core/src/lib/general/gr_cpfsk_bc.i | 34 ++++++++++++
5 files changed, 182 insertions(+), 2 deletions(-)
create mode 100644 gnuradio-core/src/lib/general/gr_cpfsk_bc.cc
create mode 100644 gnuradio-core/src/lib/general/gr_cpfsk_bc.h
create mode 100644 gnuradio-core/src/lib/general/gr_cpfsk_bc.i
(limited to 'gnuradio-core/src/lib')
diff --git a/gnuradio-core/src/lib/general/Makefile.am b/gnuradio-core/src/lib/general/Makefile.am
index ef5354cfe8..5a12a739a7 100644
--- a/gnuradio-core/src/lib/general/Makefile.am
+++ b/gnuradio-core/src/lib/general/Makefile.am
@@ -55,6 +55,7 @@ libgeneral_la_SOURCES = \
gr_correlate_access_code_bb.cc \
gr_costas_loop_cc.cc \
gr_count_bits.cc \
+ gr_cpfsk_bc.cc \
gr_crc32.cc \
gr_ctcss_squelch_ff.cc \
gr_dd_mpsk_sync_cc.cc \
@@ -197,7 +198,8 @@ grinclude_HEADERS = \
gr_correlate_access_code_bb.h \
gr_costas_loop_cc.h \
gr_count_bits.h \
- gr_crc32.h \
+ gr_cpfsk_bc.h \
+ gr_crc32.h \
gr_ctcss_squelch_ff.h \
gr_dd_mpsk_sync_cc.h \
gr_diff_decoder_bb.h \
@@ -352,6 +354,7 @@ swiginclude_HEADERS = \
gr_constellation_decoder_cb.i \
gr_correlate_access_code_bb.i \
gr_costas_loop_cc.i \
+ gr_cpfsk_bc.i \
gr_crc32.i \
gr_ctcss_squelch_ff.i \
gr_dd_mpsk_sync_cc.i \
diff --git a/gnuradio-core/src/lib/general/general.i b/gnuradio-core/src/lib/general/general.i
index 64aa2d889b..724ea03168 100644
--- a/gnuradio-core/src/lib/general/general.i
+++ b/gnuradio-core/src/lib/general/general.i
@@ -1,6 +1,6 @@
/* -*- c++ -*- */
/*
- * Copyright 2004,2005,2006,2007 Free Software Foundation, Inc.
+ * Copyright 2004,2005,2006,2007,2008 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
@@ -130,6 +130,7 @@
#include <gr_glfsr_source_f.h>
#include <gr_peak_detector2_fb.h>
#include <gr_repeat.h>
+#include <gr_cpfsk_bc.h>
%}
%include "gr_nop.i"
@@ -240,3 +241,4 @@
%include "gr_glfsr_source_f.i"
%include "gr_peak_detector2_fb.i"
%include "gr_repeat.i"
+%include "gr_cpfsk_bc.i"
diff --git a/gnuradio-core/src/lib/general/gr_cpfsk_bc.cc b/gnuradio-core/src/lib/general/gr_cpfsk_bc.cc
new file mode 100644
index 0000000000..95d7c1753d
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_cpfsk_bc.cc
@@ -0,0 +1,78 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008 Free Software Foundation, Inc.
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gr_cpfsk_bc.h>
+#include <gr_io_signature.h>
+#include <gr_expj.h>
+
+#define M_TWOPI (2*M_PI)
+
+gr_cpfsk_bc_sptr
+gr_make_cpfsk_bc(float k, float ampl, int samples_per_sym)
+{
+ return gr_cpfsk_bc_sptr(new gr_cpfsk_bc(k, ampl, samples_per_sym));
+}
+
+gr_cpfsk_bc::gr_cpfsk_bc(float k, float ampl, int samples_per_sym)
+ : gr_sync_interpolator("cpfsk_bc",
+ gr_make_io_signature(1, 1, sizeof(char)),
+ gr_make_io_signature(1, 1, sizeof(gr_complex)),
+ samples_per_sym)
+{
+ d_samples_per_sym = samples_per_sym;
+ d_freq = k*M_PI/samples_per_sym;
+ d_ampl = ampl;
+ d_phase = 0.0;
+}
+
+gr_cpfsk_bc::~gr_cpfsk_bc()
+{
+}
+
+int
+gr_cpfsk_bc::work(int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items)
+{
+ const char *in = (const char *)input_items[0];
+ gr_complex *out = (gr_complex *)output_items[0];
+
+ for (int i = 0; i < noutput_items/d_samples_per_sym; i++) {
+ for (int j = 0; j < d_samples_per_sym; j++) {
+ if (in[i] == 1)
+ d_phase += d_freq;
+ else
+ d_phase -= d_freq;
+
+ while (d_phase > M_TWOPI)
+ d_phase -= M_TWOPI;
+ while (d_phase < -M_TWOPI)
+ d_phase += M_TWOPI;
+
+ *out++ = gr_expj(d_phase)*d_ampl;
+ }
+ }
+
+ return noutput_items;
+}
diff --git a/gnuradio-core/src/lib/general/gr_cpfsk_bc.h b/gnuradio-core/src/lib/general/gr_cpfsk_bc.h
new file mode 100644
index 0000000000..38429543f8
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_cpfsk_bc.h
@@ -0,0 +1,63 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008 Free Software Foundation, Inc.
+ *
+ * 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.
+ */
+#ifndef INCLUDED_GR_CPFSK_BC_H
+#define INCLUDED_GR_CPFSK_BC_H
+
+#include <gr_sync_interpolator.h>
+
+class gr_cpfsk_bc;
+
+typedef boost::shared_ptr<gr_cpfsk_bc> gr_cpfsk_bc_sptr;
+
+gr_cpfsk_bc_sptr gr_make_cpfsk_bc(float k, float ampl, int samples_per_sym);
+
+/*!
+ * \brief Perform continuous phase 2-level frequncy modulation on an input stream
+ * of unpacked bits.
+ * \ingroup modulation
+ *
+ * \param k modulation index
+ * \param ampl output amplitude
+ * \param samples_per_sym number of output samples per input bit
+ */
+
+class gr_cpfsk_bc : public gr_sync_interpolator
+{
+private:
+ friend gr_cpfsk_bc_sptr gr_make_cpfsk_bc(float k, float ampl, int samples_per_sym);
+
+ gr_cpfsk_bc(float k, float ampl, int samples_per_sym);
+
+ int d_samples_per_sym; // Samples per symbol, square pulse
+ float d_freq; // Modulation index*pi/samples_per_sym
+ float d_ampl; // Output amplitude
+ float d_phase; // Current phase
+
+ public:
+ ~gr_cpfsk_bc();
+
+ void set_amplitude(float amplitude) { d_ampl = amplitude; }
+
+ int work (int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items);
+};
+
+#endif /* INCLUDED_GR_CPFSK_BC_H */
diff --git a/gnuradio-core/src/lib/general/gr_cpfsk_bc.i b/gnuradio-core/src/lib/general/gr_cpfsk_bc.i
new file mode 100644
index 0000000000..918766a680
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_cpfsk_bc.i
@@ -0,0 +1,34 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008 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.
+ */
+
+GR_SWIG_BLOCK_MAGIC(gr,cpfsk_bc);
+
+gr_cpfsk_bc_sptr gr_make_cpfsk_bc(float k, float ampl, int samples_per_sym);
+
+class gr_cpfsk_bc : public gr_sync_interpolator
+{
+private:
+ gr_cpfsk_bc(float k, float ampl, int samples_per_sym);
+
+public:
+ void set_amplitude(float amplitude);
+};
--
cgit v1.2.3