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diff --git a/gr-digital/lib/cma_equalizer_cc_impl.h b/gr-digital/lib/cma_equalizer_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_CMA_EQUALIZER_CC_IMPL_H
+#define	INCLUDED_DIGITAL_CMA_EQUALIZER_CC_IMPL_H
+
+#include <digital/cma_equalizer_cc.h>
+#include <filter/fir_filter.h>
+#include <gr_math.h>
+#include <stdexcept>
+
+namespace gr {
+  namespace digital {
+
+    class cma_equalizer_cc_impl
+      : public cma_equalizer_cc, filter::kernel::fir_filter_ccc
+    {
+    private:
+      std::vector<gr_complex> d_new_taps;
+      bool d_updated;
+      gr_complex d_error;
+
+      float d_modulus;
+      float d_mu;
+
+    protected:
+      gr_complex error(const gr_complex &out);
+      void update_tap(gr_complex &tap, const gr_complex &in);
+  
+    public:
+      cma_equalizer_cc_impl(int num_taps, float modulus, float mu, int sps);
+      ~cma_equalizer_cc_impl();
+
+      void set_taps(const std::vector<gr_complex> &taps);
+      std::vector<gr_complex> taps() const;
+
+      float gain() const
+      {
+	return d_mu;
+      }
+
+      void set_gain(float mu) 
+      {
+	if(mu < 0.0f || mu > 1.0f) {
+	  throw std::out_of_range("cma_equalizer::set_gain: Gain value must be in [0,1]");
+	}
+	d_mu = mu;
+      }
+    
+      float modulus() const
+      {
+	return d_modulus;
+      }
+
+      void set_modulus(float mod) 
+      {
+	if(mod < 0)
+	  throw std::out_of_range("cma_equalizer::set_modulus: Modulus value must be >= 0");
+	d_modulus = mod;
+      }
+
+      int work(int noutput_items,
+	       gr_vector_const_void_star &input_items,
+	       gr_vector_void_star &output_items);
+    };
+
+  } /* namespace digital */
+} /* namespace gr */
+
+#endif /* INCLUDED_DIGITAL_CMA_EQUALIZER_CC_IMPL_H */