From 461725e514dcf5e2f7fa3e83249467ef28766869 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Mon, 26 Sep 2011 14:59:01 -0400
Subject: digital: moved header files from lib to include in gr-digital.
---
gr-digital/include/digital_clock_recovery_mm_ff.h | 98 +++++++++++++++++++++++
1 file changed, 98 insertions(+)
create mode 100644 gr-digital/include/digital_clock_recovery_mm_ff.h
(limited to 'gr-digital/include/digital_clock_recovery_mm_ff.h')
diff --git a/gr-digital/include/digital_clock_recovery_mm_ff.h b/gr-digital/include/digital_clock_recovery_mm_ff.h
new file mode 100644
index 0000000000..6fc5ac2616
--- /dev/null
+++ b/gr-digital/include/digital_clock_recovery_mm_ff.h
@@ -0,0 +1,98 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2011 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.
+ */
+
+#ifndef INCLUDED_DIGITAL_CLOCK_RECOVERY_MM_FF_H
+#define INCLUDED_DIGITAL_CLOCK_RECOVERY_MM_FF_H
+
+#include <gr_block.h>
+#include <gr_math.h>
+#include <stdio.h>
+
+class gri_mmse_fir_interpolator;
+
+class digital_clock_recovery_mm_ff;
+typedef boost::shared_ptr<digital_clock_recovery_mm_ff> digital_clock_recovery_mm_ff_sptr;
+
+// public constructor
+digital_clock_recovery_mm_ff_sptr
+digital_make_clock_recovery_mm_ff (float omega, float gain_omega,
+ float mu, float gain_mu,
+ float omega_relative_limit=0.001);
+
+/*!
+ * \brief Mueller and Müller (M&M) based clock recovery block with float input, float output.
+ * \ingroup sync_blk
+ *
+ * This implements the Mueller and Müller (M&M) discrete-time error-tracking synchronizer.
+ *
+ * See "Digital Communication Receivers: Synchronization, Channel
+ * Estimation and Signal Processing" by Heinrich Meyr, Marc Moeneclaey, & Stefan Fechtel.
+ * ISBN 0-471-50275-8.
+ */
+class digital_clock_recovery_mm_ff : public gr_block
+{
+ public:
+ ~digital_clock_recovery_mm_ff ();
+ void forecast(int noutput_items, gr_vector_int &ninput_items_required);
+ int general_work (int noutput_items,
+ gr_vector_int &ninput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items);
+ float mu() const { return d_mu;}
+ float omega() const { return d_omega;}
+ float gain_mu() const { return d_gain_mu;}
+ float gain_omega() const { return d_gain_omega;}
+
+ void set_gain_mu (float gain_mu) { d_gain_mu = gain_mu; }
+ void set_gain_omega (float gain_omega) { d_gain_omega = gain_omega; }
+ void set_mu (float mu) { d_mu = mu; }
+ void set_omega (float omega){
+ d_omega = omega;
+ d_min_omega = omega*(1.0 - d_omega_relative_limit);
+ d_max_omega = omega*(1.0 + d_omega_relative_limit);
+ d_omega_mid = 0.5*(d_min_omega+d_max_omega);
+ }
+
+protected:
+ digital_clock_recovery_mm_ff (float omega, float gain_omega, float mu, float gain_mu,
+ float omega_relative_limit);
+
+ private:
+ float d_mu; // fractional sample position [0.0, 1.0]
+ float d_omega; // nominal frequency
+ float d_min_omega; // minimum allowed omega
+ float d_omega_mid; // average omega
+ float d_max_omega; // maximum allowed omega
+ float d_gain_omega; // gain for adjusting omega
+ float d_gain_mu; // gain for adjusting mu
+ float d_last_sample;
+ gri_mmse_fir_interpolator *d_interp;
+ FILE *d_logfile;
+ float d_omega_relative_limit; // used to compute min and max omega
+
+ friend digital_clock_recovery_mm_ff_sptr
+ digital_make_clock_recovery_mm_ff (float omega, float gain_omega,
+ float mu, float gain_mu,
+ float omega_relative_limit);
+};
+
+#endif
--
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