deepspace-turbo/libconvcodes.h

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//
// Created by gianluca on 20/02/17.
//

#ifndef DEEPSPACE_TURBO_LIBCONVCODES_H
#define DEEPSPACE_TURBO_LIBCONVCODES_H

typedef struct str_convcode{
    int components;
    int memory;
    int **forward_connections;
    int *backward_connections;
    int **next_state;
    int **neighbors;
    int ***output;
} t_convcode;

int get_bit(int num, int position);
char* state2str(int state, int memory);
int convcode_stateupdate(int state, int input, t_convcode *code);
int *convcode_output(int state, int input, t_convcode *code);

t_convcode *convcode_initialize(char *forward[], char *backward, int N_components);
void convcode_clear(t_convcode *code);
int* convcode_encode(int *packet, int packet_length, t_convcode *code);
int* convcode_decode(double *received, int length, t_convcode *code);

void print_neighbors(t_convcode *code);

// BCJR decoding
int * convcode_extrinsic(double *received, double length, double ***a_priori, t_convcode *code, double noise_variance,
                         int decision);

static double exp_sum(double a, double b);

#endif //DEEPSPACE_TURBO_LIBCONVCODES_H