From f968b36d4ed2b194111585605f9a1b5367638fb3 Mon Sep 17 00:00:00 2001
From: Martin Braun <martin.braun@kit.edu>
Date: Fri, 15 Mar 2013 02:12:20 -0700
Subject: Squash/rebased martin/ofdm-master onto trial merge branch
Conflicts:
gr-blocks/include/blocks/CMakeLists.txt
---
gr-digital/lib/digital_ofdm_equalizer_static.cc | 90 +++++++++++++++++++++++++
1 file changed, 90 insertions(+)
create mode 100644 gr-digital/lib/digital_ofdm_equalizer_static.cc
(limited to 'gr-digital/lib/digital_ofdm_equalizer_static.cc')
diff --git a/gr-digital/lib/digital_ofdm_equalizer_static.cc b/gr-digital/lib/digital_ofdm_equalizer_static.cc
new file mode 100644
index 0000000000..66903fa90a
--- /dev/null
+++ b/gr-digital/lib/digital_ofdm_equalizer_static.cc
@@ -0,0 +1,90 @@
+/* -*- c++ -*- */
+/* Copyright 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 "digital_ofdm_equalizer_static.h"
+
+#include <iostream>
+
+digital_ofdm_equalizer_static_sptr
+digital_make_ofdm_equalizer_static(
+ int fft_len,
+ const std::vector<std::vector<int> > &occupied_carriers,
+ const std::vector<std::vector<int> > &pilot_carriers,
+ const std::vector<std::vector<gr_complex> > &pilot_symbols,
+ int symbols_skipped,
+ bool input_is_shifted)
+{
+ return digital_ofdm_equalizer_static_sptr(new digital_ofdm_equalizer_static(
+ fft_len,
+ occupied_carriers,
+ pilot_carriers,
+ pilot_symbols,
+ symbols_skipped,
+ input_is_shifted));
+}
+
+digital_ofdm_equalizer_static::digital_ofdm_equalizer_static(
+ int fft_len,
+ const std::vector<std::vector<int> > &occupied_carriers,
+ const std::vector<std::vector<int> > &pilot_carriers,
+ const std::vector<std::vector<gr_complex> > &pilot_symbols,
+ int symbols_skipped,
+ bool input_is_shifted)
+ : digital_ofdm_equalizer_1d_pilots(fft_len, occupied_carriers, pilot_carriers, pilot_symbols, symbols_skipped, input_is_shifted)
+{
+}
+
+
+digital_ofdm_equalizer_static::~digital_ofdm_equalizer_static()
+{
+}
+
+
+void
+digital_ofdm_equalizer_static::equalize(gr_complex *frame,
+ int n_sym,
+ const std::vector<gr_complex> &initial_taps,
+ const std::vector<gr_tag_t> &tags)
+{
+ d_channel_state = initial_taps;
+
+ for (int i = 0; i < n_sym; i++) {
+ for (int k = 0; k < d_fft_len; k++) {
+ if (!d_occupied_carriers[k]) {
+ continue;
+ }
+ if (d_pilot_carriers.size() && d_pilot_carriers[d_pilot_carr_set][k-d_carr_offset]) {
+ d_channel_state[k] = frame[i*d_fft_len + k] / d_pilot_symbols[d_pilot_carr_set][k-d_carr_offset];
+ frame[i*d_fft_len+k] = d_pilot_symbols[d_pilot_carr_set][k-d_carr_offset];
+ } else {
+ frame[i*d_fft_len+k] /= d_channel_state[k];
+ }
+ }
+ if (!d_pilot_carriers.empty()) {
+ d_pilot_carr_set = (d_pilot_carr_set + 1) % d_pilot_carriers.size();
+ }
+ }
+}
+
--
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