3 files changed, 79 insertions, 0 deletions
diff --git a/gr-digital/include/CMakeLists.txt b/gr-digital/include/CMakeLists.txt
index 8bac4c9919..81ed8d368e 100644
--- a/gr-digital/include/CMakeLists.txt
+++ b/gr-digital/include/CMakeLists.txt
@@ -45,6 +45,7 @@ install(FILES
     digital_ofdm_insert_preamble.h
     digital_ofdm_mapper_bcv.h
     digital_ofdm_sampler.h
+    digital_probe_mpsk_snr_est_c.h
     digital_gmskmod_bc.h
     digital_cpmmod_bc.h
     DESTINATION ${GR_INCLUDE_DIR}/gnuradio
diff --git a/gr-digital/include/Makefile.am b/gr-digital/include/Makefile.am
index 9fa6190154..3cf186d3d0 100644
--- a/gr-digital/include/Makefile.am
+++ b/gr-digital/include/Makefile.am
@@ -40,12 +40,14 @@ grinclude_HEADERS = 				\
 	digital_kurtotic_equalizer_cc.h 	\
 	digital_metric_type.h			\
 	digital_mpsk_receiver_cc.h		\
+	digital_mpsk_snr_est_cc.h		\
 	digital_ofdm_cyclic_prefixer.h		\
 	digital_ofdm_frame_acquisition.h	\
 	digital_ofdm_frame_sink.h		\
 	digital_ofdm_insert_preamble.h		\
 	digital_ofdm_mapper_bcv.h		\
 	digital_ofdm_sampler.h			\
+	digital_probe_mpsk_snr_est_c.h		\
 	digital_gmskmod_bc.h 			\
 	digital_cpmmod_bc.h
 
diff --git a/gr-digital/include/digital_probe_mpsk_snr_est_c.h b/gr-digital/include/digital_probe_mpsk_snr_est_c.h
new file mode 100644
index 0000000000..4920a0ae3b
--- /dev/null
+++ b/gr-digital/include/digital_probe_mpsk_snr_est_c.h
@@ -0,0 +1,76 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 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_PROBE_MPSK_SNR_EST_C_H
+#define INCLUDED_DIGITAL_PROBE_MPSK_SNR_EST_C_H
+
+#include <digital_api.h>
+#include <gr_sync_block.h>
+#include <digital_impl_mpsk_snr_est.h>
+
+class digital_probe_mpsk_snr_est_c;
+typedef boost::shared_ptr<digital_probe_mpsk_snr_est_c> digital_probe_mpsk_snr_est_c_sptr;
+
+DIGITAL_API digital_probe_mpsk_snr_est_c_sptr
+digital_make_probe_mpsk_snr_est_c(snr_est_type_t type, double alpha);
+
+/*!
+ * Provides various methods to compute SNR.
+ */
+class DIGITAL_API digital_probe_mpsk_snr_est_c : public gr_sync_block
+{
+ private:
+  snr_est_type_t d_type;
+  double d_alpha;
+  digital_impl_mpsk_snr_est *d_snr_est;
+
+  // Factory function returning shared pointer of this class
+  friend DIGITAL_API digital_probe_mpsk_snr_est_c_sptr
+    digital_make_probe_mpsk_snr_est_c(snr_est_type_t type, double alpha);
+  
+  // Private constructor
+  digital_probe_mpsk_snr_est_c(snr_est_type_t type, double alpha);
+
+public:
+
+  ~digital_probe_mpsk_snr_est_c();
+
+  int work (int noutput_items,
+	    gr_vector_const_void_star &input_items,
+	    gr_vector_void_star &output_items);
+
+  //! Return the estimated signal-to-noise ratio in decibels
+  double snr();
+
+  //! Return the type of estimator in use
+  snr_est_type_t type() const;
+
+  //! Get the running-average coefficient
+  double alpha() const;
+
+  //! Set type of estimator to use
+  void set_type(snr_est_type_t t);
+
+  //! Set the running-average coefficient
+  void set_alpha(double alpha);
+};
+
+#endif /* INCLUDED_DIGITAL_PROBE_MPSK_SNR_EST_C_H */