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diff --git a/gr-digital/lib/mpsk_snr_est_cc_impl.h b/gr-digital/lib/mpsk_snr_est_cc_impl.h
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+++ b/gr-digital/lib/mpsk_snr_est_cc_impl.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2011,2012 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_MPSK_SNR_EST_CC_IMPL_H
+#define INCLUDED_DIGITAL_MPSK_SNR_EST_CC_IMPL_H
+
+#include <digital/api.h>
+#include <digital/mpsk_snr_est_cc.h>
+#include <gr_sync_block.h>
+
+namespace gr {
+  namespace digital {
+
+    class mpsk_snr_est_cc_impl : public mpsk_snr_est_cc
+    {
+    private:
+      snr_est_type_t d_type;
+      int d_nsamples, d_count;
+      double d_alpha;
+      mpsk_snr_est *d_snr_est;
+
+      //d_key is the tag name, 'snr', d_me is the block name + unique ID
+      pmt::pmt_t d_key, d_me; 
+
+    public:
+      mpsk_snr_est_cc_impl(snr_est_type_t type,
+			   int tag_nsamples=10000,
+			   double alpha=0.001);
+      ~mpsk_snr_est_cc_impl();
+
+      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;
+
+      //! Return how many samples between SNR tags
+      int tag_nsample() 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 number of samples between SNR tags
+      void set_tag_nsample(int n);
+
+      //! Set the running-average coefficient
+      void set_alpha(double alpha);
+    };
+
+  } /* namespace digital */
+} /* namespace gr */
+
+#endif /* INCLUDED_DIGITAL_MPSK_SNR_EST_CC_IMPL_H */