add ofdm_utils

2013-07-16 12:40:23 +02:00
parent c93baa0e2d
commit 1697580274
3 changed files with 213 additions and 0 deletions
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2013 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 "ofdm_utils.h"
+
+#include <boost/crc.hpp>
+#include <cassert>
+#include <cstring>
+#include <iostream>
+#include <math.h>
+
+
+ofdm_param::ofdm_param(ENCODING e) {
+	encoding = e;
+
+	switch(e) {
+		case BPSK_1_2:
+			n_bpsc = 1;
+			n_cbps = 48;
+			n_dbps = 24;
+			rate_field = 0x0D; // 0b00001101
+			break;
+
+		case BPSK_3_4:
+			n_bpsc = 1;
+			n_cbps = 48;
+			n_dbps = 36;
+			rate_field = 0x0F; // 0b00001111
+			break;
+
+		case QPSK_1_2:
+			n_bpsc = 2;
+			n_cbps = 96;
+			n_dbps = 48;
+			rate_field = 0x05; // 0b00000101
+			break;
+
+		case QPSK_3_4:
+			n_bpsc = 2;
+			n_cbps = 96;
+			n_dbps = 72;
+			rate_field = 0x07; // 0b00000111
+			break;
+
+		case QAM16_1_2:
+			n_bpsc = 4;
+			n_cbps = 192;
+			n_dbps = 96;
+			rate_field = 0x09; // 0b00001001
+			break;
+
+		case QAM16_3_4:
+			n_bpsc = 4;
+			n_cbps = 192;
+			n_dbps = 144;
+			rate_field = 0x0B; // 0b00001011
+			break;
+
+		case QAM64_2_3:
+			n_bpsc = 6;
+			n_cbps = 288;
+			n_dbps = 192;
+			rate_field = 0x01; // 0b00000001
+			break;
+
+		case QAM64_3_4:
+			n_bpsc = 6;
+			n_cbps = 288;
+			n_dbps = 216;
+			rate_field = 0x03; // 0b00000011
+			break;
+		defaut:
+			assert(false);
+			break;
+	}
+}
+
+void
+ofdm_param::print_out() {
+	std::cout << "OFDM Parameters:" << std::endl;
+	std::cout << "endcoding :" << encoding << std::endl;
+	std::cout << "rate_field :" << (int)rate_field << std::endl;
+	std::cout << "n_bpsc :" << n_bpsc << std::endl;
+	std::cout << "n_cbps :" << n_cbps << std::endl;
+	std::cout << "n_dbps :" << n_dbps << std::endl;
+}
+
+tx_param::tx_param(ofdm_param &ofdm, int psdu_length) {
+
+	psdu_size = psdu_length;
+
+	// number of symbols (17-11)
+	n_sym = (int) ceil((16 + 8 * psdu_size + 6) / (double) ofdm.n_dbps);
+
+	// number of bits of the data field (17-12)
+	n_data = n_sym * ofdm.n_dbps;
+
+	// number of padding bits (17-13)
+	n_pad = n_data - (16 + 8 * psdu_size + 6);
+
+	n_encoded_bits = n_sym * ofdm.n_cbps;
+}
+void
+tx_param::print_out() {
+	std::cout << "TX Parameters:" << std::endl;
+	std::cout << "psdu_size: " << psdu_size << std::endl;
+	std::cout << "n_sym: " << n_sym << std::endl;
+	std::cout << "n_data: " << n_data << std::endl;
+	std::cout << "n_pad: " << n_pad << std::endl;
+}
+