1 files changed, 79 insertions, 0 deletions
diff --git a/gr-digital/lib/ofdm_cyclic_prefixer_impl.cc b/gr-digital/lib/ofdm_cyclic_prefixer_impl.cc
new file mode 100644
index 0000000000..67cfba615f
--- /dev/null
+++ b/gr-digital/lib/ofdm_cyclic_prefixer_impl.cc
@@ -0,0 +1,79 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2006,2010-2012 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "ofdm_cyclic_prefixer_impl.h"
+#include <gr_io_signature.h>
+
+namespace gr {
+  namespace digital {
+    
+    ofdm_cyclic_prefixer::sptr
+    ofdm_cyclic_prefixer::make(size_t input_size, size_t output_size)
+    {
+      return gnuradio::get_initial_sptr
+	(new ofdm_cyclic_prefixer_impl(input_size, output_size));
+    }
+
+    ofdm_cyclic_prefixer_impl::ofdm_cyclic_prefixer_impl(size_t input_size,
+							 size_t output_size)
+      : gr_sync_interpolator("ofdm_cyclic_prefixer",
+			     gr_make_io_signature(1, 1, input_size*sizeof(gr_complex)),
+			     gr_make_io_signature(1, 1, sizeof(gr_complex)),
+			     output_size),
+	d_input_size(input_size),
+	d_output_size(output_size)
+    {
+    }
+
+    ofdm_cyclic_prefixer_impl::~ofdm_cyclic_prefixer_impl()
+    {
+    }
+
+    int
+    ofdm_cyclic_prefixer_impl::work(int noutput_items,
+				    gr_vector_const_void_star &input_items,
+				    gr_vector_void_star &output_items)
+    {
+      gr_complex *in = (gr_complex*)input_items[0];
+      gr_complex *out = (gr_complex*)output_items[0];
+      size_t cp_size = d_output_size - d_input_size;
+      unsigned int i=0, j=0;
+
+      j = cp_size;
+      for(i=0; i < d_input_size; i++,j++) {
+	out[j] = in[i];
+      }
+
+      j = d_input_size - cp_size;
+      for(i=0; i < cp_size; i++, j++) {
+	out[i] = in[j];
+      }
+
+      return d_output_size;
+    }
+
+  } /* namespace digital */
+} /* namespace gr */