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This commit is contained in:
Bastian Bloessl
2016-04-20 07:45:49 +02:00
parent 0f56254df3
commit 760fc86101
38 changed files with 659 additions and 1593 deletions
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lib/utils.h
+15 -80
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@@ -14,18 +14,15 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_IEEE802_11_OFDM_UTILS_H
#define INCLUDED_IEEE802_11_OFDM_UTILS_H
#ifndef INCLUDED_IEEE802_11_UTILS_H
#define INCLUDED_IEEE802_11_UTILS_H
#include <ieee802-11/api.h>
#include <ieee802-11/ofdm_mapper.h>
#include <ieee802-11/mapper.h>
#include <gnuradio/config.h>
#include <cinttypes>
#include <iostream>
// Needed for the SSE2 Viterbi decoder
#include <xmmintrin.h>
const int MAX_SYM = 520; // enough for 1500 byte BPSK 1/2
const int MAX_BITS = 1550 * 8 * 2;
@@ -54,7 +51,7 @@ struct mac_header {
}__attribute__((packed));
/**
* OFDM parameters
* WIFI parameters
*/
class ofdm_param {
public:
@@ -77,9 +74,9 @@ public:
/**
* packet specific parameters
*/
class tx_param {
class frame_param {
public:
tx_param(ofdm_param &ofdm, int psdu_length);
frame_param(ofdm_param &ofdm, int psdu_length);
// PSDU size in bytes
int psdu_size;
// number of OFDM symbols (17-11)
@@ -108,81 +105,19 @@ public:
void generate_mac_data_frame(const char *msdu, int msdu_size, char **psdu, int *psdu_size, char seq);
void scramble(const char *input, char *out, tx_param &tx, char initial_state);
void scramble(const char *input, char *out, frame_param &frame, char initial_state);
void reset_tail_bits(char *scrambled_data, tx_param &tx);
void reset_tail_bits(char *scrambled_data, frame_param &frame);
void convolutional_encoding(const char *input, char *out, tx_param &tx);
void convolutional_encoding(const char *input, char *out, frame_param &frame);
void puncturing(const char *input, char *out, tx_param &tx, ofdm_param &ofdm);
void puncturing(const char *input, char *out, frame_param &frame, ofdm_param &ofdm);
void interleave(const char *input, char *out, tx_param &tx, ofdm_param &ofdm, bool reverse = false);
void interleave(const double *input, double *out, tx_param &tx, ofdm_param &ofdm, bool reverse = false);
void interleave(const char *input, char *out, frame_param &frame, ofdm_param &ofdm, bool reverse = false);
void interleave(const double *input, double *out, frame_param &frame, ofdm_param &ofdm, bool reverse = false);
void split_symbols(const char *input, char *out, tx_param &tx, ofdm_param &ofdm);
void split_symbols(const char *input, char *out, frame_param &frame, ofdm_param &ofdm);
void generate_bits(const char *psdu, char *data_bits, tx_param &tx);
void generate_bits(const char *psdu, char *data_bits, frame_param &frame);
/* New functions for the SSE2 Convolutional Decoder */
/* This Viterbi decoder was taken from the gr-dvbt module of
* GNU Radio. It is an SSE2 version of the Viterbi Decoder
* created by Phil Karn. The SSE2 version was made by Bogdan
* Diaconescu. For more info see: gr-dvbt/lib/d_viterbi.h
*/
struct viterbi_state {
unsigned long path; /* Decoded path to this state */
long metric; /* Cumulative metric to this state */
/* vector implementation */
__m128i pp; /* Decoded path to this state */
__m128i mm; /* Cumulative metric to this state */
};
int d_gen_met(int mettab[2][256], /* Metric table */
int amp, /* Signal amplitude */
double esn0, /* Es/N0 ratio in dB */
double bias, /* Metric bias */
int scale); /* Scale factor */
unsigned char
d_encode(unsigned char *symbols, unsigned char *data,
unsigned int nbytes,unsigned char encstate);
void
d_viterbi_chunks_init(struct viterbi_state* state);
void
d_viterbi_chunks_init_sse2(__m128i *mm0, __m128i *pp0);
void
d_viterbi_butterfly2(unsigned char *symbols, int mettab[2][256], struct viterbi_state *state0, struct viterbi_state *state1);
void
d_viterbi_butterfly2_sse2(unsigned char *symbols, __m128i m0[], __m128i m1[], __m128i p0[], __m128i p1[]);
void
d_viterbi_butterfly_sse2(unsigned char *symbols, __m128i m0[], __m128i m1[], __m128i p0[], __m128i p1[]);
unsigned char
d_viterbi_get_output(struct viterbi_state *state, unsigned char *outbuf);
unsigned char
d_viterbi_get_output_sse2(__m128i *mm0, __m128i *pp0, int ntraceback, unsigned char *outbuf);
int
d_viterbi(unsigned long *metric, /* Final path metric (returned value) */
unsigned char *data, /* Decoded output data */
unsigned char *symbols, /* Raw deinterleaved input symbols */
unsigned int nbits, /* Number of output bits */
int mettab[2][256] /* Metric table, [sent sym][rx symbol] */
);
/* End of added functions */
#endif /* INCLUDED_IEEE802_11_OFDM_UTILS_H */
#endif /* INCLUDED_IEEE802_11_UTILS_H */