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diff --git a/gr-digital/hier/digital_cpmmod_bc.h b/gr-digital/hier/digital_cpmmod_bc.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2010 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_CPMMOD_BC_H
+#define INCLUDED_DIGITAL_CPMMOD_BC_H
+
+#include <digital_api.h>
+#include <gr_hier_block2.h>
+#include <gr_char_to_float.h>
+#include <gr_interp_fir_filter_fff.h>
+#include <gr_frequency_modulator_fc.h>
+#include <gr_cpm.h>
+
+
+class digital_cpmmod_bc;
+typedef boost::shared_ptr<digital_cpmmod_bc> digital_cpmmod_bc_sptr;
+
+
+DIGITAL_API digital_cpmmod_bc_sptr
+digital_make_cpmmod_bc(int type, float h,
+		       unsigned samples_per_sym,
+		       unsigned L, double beta=0.3);
+
+/*!
+ * \brief Generic CPM modulator
+ *
+ * \ingroup modulation_blk
+ *
+ * \param type The modulation type. Can be one of LREC, LRC, LSRC, TFM
+ *             or GAUSSIAN. See gr_cpm::phase_response() for a
+ *             detailed description.
+ * \param h The modulation index. \f$ h \cdot \pi\f$ is the maximum
+ *          phase change that can occur between two symbols, i.e., if
+ *          you only send ones, the phase will increase by \f$ h \cdot
+ *          \pi\f$ every \p samples_per_sym samples. Set this to 0.5
+ *          for Minimum Shift Keying variants.
+ * \param samples_per_sym Samples per symbol.
+ * \param L The length of the phase duration in symbols. For L=1, this
+ *          yields full- response CPM symbols, for L > 1,
+ *          partial-response.
+ * \param beta For LSRC, this is the rolloff factor. For Gaussian
+ *             pulses, this is the 3 dB time-bandwidth product.
+ *
+ * Examples:
+ * - Setting h = 0.5, L = 1, type = LREC yields MSK.
+ * - Setting h = 0.5, type = GAUSSIAN and beta = 0.3 yields GMSK
+ *           as used in GSM.
+ *
+ * The input of this block are symbols from an M-ary alphabet
+ * +/-1, +/-3, ..., +/-(M-1). Usually, M = 2 and therefore, the
+ * valid inputs are +/-1.
+ * The modulator will silently accept any other inputs, though.
+ * The output is the phase-modulated signal.
+ */
+class DIGITAL_API digital_cpmmod_bc : public gr_hier_block2
+{
+  friend DIGITAL_API digital_cpmmod_bc_sptr digital_make_cpmmod_bc(int type, float h,
+						       unsigned samples_per_sym,
+						       unsigned L, double beta);
+  
+  std::vector<float> d_taps;
+  gr_char_to_float_sptr d_char_to_float;
+  gr_interp_fir_filter_fff_sptr d_pulse_shaper;
+  gr_frequency_modulator_fc_sptr d_fm;
+  
+protected:
+  digital_cpmmod_bc(gr_cpm::cpm_type type, float h,
+		    unsigned samples_per_sym,
+		    unsigned L, double beta);
+  
+public:
+  //! Return the phase response FIR taps
+  std::vector<float> get_taps() { return d_taps; };
+};
+
+#endif /* INCLUDED_DIGITAL_CPMMOD_BC_H */
+