Bastian Bloessl
80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
/*
|
|
* Copyright (C) 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 "base.h"
|
|
#include <cstring>
|
|
#include <iostream>
|
|
|
|
using namespace gr::ieee802_11;
|
|
|
|
base::base() : d_store_pos(0) {}
|
|
|
|
base::~base() {}
|
|
|
|
uint8_t* base::depuncture(uint8_t* in)
|
|
{
|
|
|
|
int count;
|
|
int n_cbps = d_ofdm->n_cbps;
|
|
uint8_t* depunctured;
|
|
|
|
if (d_ntraceback == 5) {
|
|
count = d_frame->n_sym * n_cbps;
|
|
depunctured = in;
|
|
|
|
} else {
|
|
depunctured = d_depunctured;
|
|
count = 0;
|
|
for (int i = 0; i < d_frame->n_sym; i++) {
|
|
for (int k = 0; k < n_cbps; k++) {
|
|
while (d_depuncture_pattern[count % (2 * d_k)] == 0) {
|
|
depunctured[count] = 2;
|
|
count++;
|
|
}
|
|
|
|
// Insert received bits
|
|
depunctured[count] = in[i * n_cbps + k];
|
|
count++;
|
|
|
|
while (d_depuncture_pattern[count % (2 * d_k)] == 0) {
|
|
depunctured[count] = 2;
|
|
count++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return depunctured;
|
|
}
|
|
|
|
/* Parity lookup table */
|
|
const unsigned char base::PARTAB[256] = {
|
|
0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1,
|
|
0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0,
|
|
0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0,
|
|
1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1,
|
|
0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0,
|
|
1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1,
|
|
1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0,
|
|
1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
|
|
0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
|
|
};
|
|
|
|
const unsigned char base::PUNCTURE_1_2[2] = { 1, 1 };
|
|
const unsigned char base::PUNCTURE_2_3[4] = { 1, 1, 1, 0 };
|
|
const unsigned char base::PUNCTURE_3_4[6] = { 1, 1, 1, 0, 0, 1 };
|