rename

2016-04-20 07:45:49 +02:00
parent 0f56254df3
commit 760fc86101
38 changed files with 659 additions and 1593 deletions
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2013, 2016 Bastian Bloessl <bloessl@ccs-labs.org>
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <ieee802-11/equalize_symbols.h>
+
+#include "utils.h"
+#include "equalizer/base.h"
+#include "equalizer/linear_comb.h"
+#include "equalizer/lms.h"
+#include <gnuradio/io_signature.h>
+
+using namespace gr::ieee802_11;
+
+
+class equalize_symbols_impl : public equalize_symbols {
+
+public:
+equalize_symbols_impl(Equalizer algo, bool debug) : block("equalize_symbols",
+			gr::io_signature::make(1, 1, 64 * sizeof(gr_complex)),
+			gr::io_signature::make(1, 1, 48 * sizeof(gr_complex))),
+			d_debug(debug), d_equalizer(NULL) {
+
+	set_relative_rate(1);
+	set_tag_propagation_policy(block::TPP_DONT);
+	set_algorithm(algo);
+}
+
+~equalize_symbols_impl(){
+}
+
+int general_work (int noutput_items, gr_vector_int& ninput_items,
+		gr_vector_const_void_star& input_items,
+		gr_vector_void_star& output_items) {
+
+	gr::thread::scoped_lock lock(d_mutex);
+
+	const gr_complex *in = (const gr_complex*)input_items[0];
+	gr_complex *out = (gr_complex*)output_items[0];
+
+	int i = 0;
+	int o = 0;
+
+	dout << "SYMBOLS: input " << ninput_items[0] << "  output " << noutput_items << std::endl;
+
+	while((i < ninput_items[0]) && (o < noutput_items)) {
+
+		get_tags_in_window(tags, 0, i, i + 1, pmt::string_to_symbol("wifi_start"));
+
+		// new WiFi frame
+		if(tags.size()) {
+			d_nsym = 0;
+		}
+
+		// first data symbol (= signal field)
+		if(d_nsym == 2) {
+			add_item_tag(0, nitems_written(0) + o,
+				pmt::string_to_symbol("wifi_start"),
+				pmt::PMT_T,
+				pmt::string_to_symbol(name()));
+		}
+
+		d_equalizer->equalize(in + (i * 64), out + (o * 48), d_nsym);
+
+		if(d_nsym > 1) {
+			o++;
+		}
+		i++;
+		d_nsym++;
+	}
+
+	dout << "SYMBOLS: consumed " << i << "  produced " << o << std::endl;
+
+	consume(0, i);
+	return o;
+}
+
+void set_algorithm(Equalizer algo) {
+	gr::thread::scoped_lock lock(d_mutex);
+	delete d_equalizer;
+
+	switch(algo) {
+	case LMS:
+		dout << "LMS" << std::endl;
+		d_equalizer = new equalizer::lms();
+		break;
+
+	case LINEAR_COMB:
+		dout << "Linear Comb" << std::endl;
+		d_equalizer = new equalizer::linear_comb();
+		break;
+	}
+}
+
+private:
+	int          d_nsym;
+	const bool   d_debug;
+	equalizer::base *d_equalizer;
+	std::vector<gr::tag_t> tags;
+	gr::thread::mutex d_mutex;
+};
+
+
+equalize_symbols::sptr
+equalize_symbols::make(Equalizer algo, bool debug) {
+	return gnuradio::get_initial_sptr(new equalize_symbols_impl(algo, debug));
+}
+