From c537cf7d85f59db21c98ac859bc08fbe55031314 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Tue, 14 Aug 2012 21:00:26 -0400
Subject: digital: converted equalizers and fixed cma equalizer.
---
gr-digital/lib/lms_dd_equalizer_cc_impl.cc | 94 ++++++++++++++++++++++++++++++
1 file changed, 94 insertions(+)
create mode 100644 gr-digital/lib/lms_dd_equalizer_cc_impl.cc
(limited to 'gr-digital/lib/lms_dd_equalizer_cc_impl.cc')
diff --git a/gr-digital/lib/lms_dd_equalizer_cc_impl.cc b/gr-digital/lib/lms_dd_equalizer_cc_impl.cc
new file mode 100644
index 0000000000..6c217896c3
--- /dev/null
+++ b/gr-digital/lib/lms_dd_equalizer_cc_impl.cc
@@ -0,0 +1,94 @@
+/* -*- 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "lms_dd_equalizer_cc_impl.h"
+#include <gr_io_signature.h>
+#include <gr_misc.h>
+#include <volk/volk.h>
+
+namespace gr {
+ namespace digital {
+
+ lms_dd_equalizer_cc::sptr
+ lms_dd_equalizer_cc::make(int num_taps, float mu, int sps,
+ constellation_sptr cnst)
+ {
+ return gnuradio::get_initial_sptr
+ (new lms_dd_equalizer_cc_impl(num_taps, mu, sps, cnst));
+ }
+
+ lms_dd_equalizer_cc_impl::lms_dd_equalizer_cc_impl(int num_taps, float mu,
+ int sps,
+ constellation_sptr cnst)
+ : gr_sync_decimator("lms_dd_equalizer_cc",
+ gr_make_io_signature(1, 1, sizeof(gr_complex)),
+ gr_make_io_signature(1, 1, sizeof(gr_complex)),
+ sps),
+ filter::kernel::fir_filter_ccc(sps, std::vector<gr_complex>(num_taps, gr_complex(0,0))),
+ d_cnst(cnst)
+ {
+ set_gain(mu);
+ if(num_taps > 0)
+ d_taps[0] = 1.0;
+ set_taps(d_taps);
+
+ const int alignment_multiple =
+ volk_get_alignment() / sizeof(gr_complex);
+ set_alignment(std::max(1,alignment_multiple));
+
+ set_history(num_taps+1);
+ }
+
+ lms_dd_equalizer_cc_impl::~lms_dd_equalizer_cc_impl()
+ {
+ }
+
+ int
+ lms_dd_equalizer_cc_impl::work(int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items)
+ {
+ const gr_complex *in = (const gr_complex *)input_items[0];
+ gr_complex *out = (gr_complex *)output_items[0];
+
+ int j = 0;
+ size_t l = d_taps.size();
+ for(int i = 0; i < noutput_items; i++) {
+ out[i] = filter(&in[j]);
+
+ d_error = error(out[i]);
+ for(size_t k=0; k < l; k++) {
+ update_tap(d_taps[k], in[i+k]);
+ }
+
+ j += decimation();
+ }
+
+ return noutput_items;
+ }
+
+ } /* namespace digital */
+} /* namespace gr */
--
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