Convolutional coding

Files
file	conv.h
	Osmocom GMR-1 convolutional coding header.
file	conv.c
	Osmocom GMR-1 convolutional coding implementation.

Enumerations
enum	osmo_conv_term

Functions
int	osmo_conv_get_input_length (const struct osmo_conv_code *code, int len)
int	osmo_conv_get_output_length (const struct osmo_conv_code *code, int len)
void	osmo_conv_encode_init (struct osmo_conv_encoder *encoder, const struct osmo_conv_code *code)
void	osmo_conv_encode_load_state (struct osmo_conv_encoder *encoder, const ubit_t *input)
int	osmo_conv_encode_raw (struct osmo_conv_encoder *encoder, const ubit_t *input, ubit_t *output, int n)
int	osmo_conv_encode_flush (struct osmo_conv_encoder *encoder, ubit_t *output)
int	osmo_conv_encode (const struct osmo_conv_code *code, const ubit_t *input, ubit_t *output)
void	osmo_conv_decode_init (struct osmo_conv_decoder *decoder, const struct osmo_conv_code *code, int len, int start_state)
void	osmo_conv_decode_reset (struct osmo_conv_decoder *decoder, int start_state)
void	osmo_conv_decode_rewind (struct osmo_conv_decoder *decoder)
void	osmo_conv_decode_deinit (struct osmo_conv_decoder *decoder)
int	osmo_conv_decode_scan (struct osmo_conv_decoder *decoder, const sbit_t *input, int n)
int	osmo_conv_decode_flush (struct osmo_conv_decoder *decoder, const sbit_t *input)
int	osmo_conv_decode_get_best_end_state (struct osmo_conv_decoder *decoder)
int	osmo_conv_decode_get_output (struct osmo_conv_decoder *decoder, ubit_t *output, int has_flush, int end_state)
int	osmo_conv_decode (const struct osmo_conv_code *code, const sbit_t *input, ubit_t *output)
int	osmo_conv_decode_acc (const struct osmo_conv_code *code, const sbit_t *input, ubit_t *output)

Variables
	CONV_TERM_FLUSH
	CONV_TERM_TRUNCATION
	CONV_TERM_TAIL_BITING
const struct osmo_conv_code	gmr1_conv_k5_12
	GMR-1 constraint length 5, rate 1/2 convolutional code.
const struct osmo_conv_code	gmr1_conv_k5_13
	GMR-1 constraint length 5, rate 1/3 convolutional code.
const struct osmo_conv_code	gmr1_conv_k5_14
	GMR-1 constraint length 5, rate 1/4 convolutional code.
const struct osmo_conv_code	gmr1_conv_k5_15
	GMR-1 constraint length 5, rate 1/5 convolutional code.
const struct osmo_conv_code	gmr1_conv_k6_14
	GMR-1 constraint length 6, rate 1/4 convolutional code.
const struct osmo_conv_code	gmr1_conv_k9_12
	GMR-1 constraint length 9, rate 1/2 convolutional code.
const struct osmo_conv_code	gmr1_conv_k9_13
	GMR-1 constraint length 9, rate 1/3 convolutional code.
const struct osmo_conv_code	gmr1_conv_k9_14
	GMR-1 constraint length 9, rate 1/4 convolutional code.
const struct osmo_conv_code	gmr1_conv_tch3
	GMR-1 TCH3 speech tail-biting convolutional code.
const struct osmo_conv_code	gmr1_conv_k5_12
	GMR-1 constraint length 5, rate 1/2 convolutional code. More...
const struct osmo_conv_code	gmr1_conv_k5_13
	GMR-1 constraint length 5, rate 1/3 convolutional code. More...
const struct osmo_conv_code	gmr1_conv_k5_14
	GMR-1 constraint length 5, rate 1/4 convolutional code. More...
const struct osmo_conv_code	gmr1_conv_k5_15
	GMR-1 constraint length 5, rate 1/5 convolutional code. More...
const struct osmo_conv_code	gmr1_conv_k6_14
	GMR-1 constraint length 6, rate 1/4 convolutional code. More...
const struct osmo_conv_code	gmr1_conv_k9_12
	GMR-1 constraint length 9, rate 1/2 convolutional code. More...
const struct osmo_conv_code	gmr1_conv_k9_13
	GMR-1 constraint length 9, rate 1/3 convolutional code. More...
const struct osmo_conv_code	gmr1_conv_k9_14
	GMR-1 constraint length 9, rate 1/4 convolutional code. More...
const struct osmo_conv_code	gmr1_conv_tch3
	GMR-1 TCH3 speech tail-biting convolutional code. More...

Detailed Description

Variable Documentation

gmr1_conv_k5_12

const struct osmo_conv_code gmr1_conv_k5_12

Initial value:

= {
        .N = 2,
        .K = 5,
        .len = 0, 
        .next_output = gmr1_conv_k5_12_next_output,
        .term = CONV_TERM_FLUSH, 
        .next_state  = gmr1_conv_k5_next_state,
}

GMR-1 constraint length 5, rate 1/2 convolutional code.

gmr1_conv_k5_13

const struct osmo_conv_code gmr1_conv_k5_13

Initial value:

= {
        .N = 3,
        .K = 5,
        .len = 0, 
        .term = CONV_TERM_FLUSH, 
        .next_output = gmr1_conv_k5_13_next_output,
        .next_state  = gmr1_conv_k5_next_state,
}

GMR-1 constraint length 5, rate 1/3 convolutional code.

gmr1_conv_k5_14

const struct osmo_conv_code gmr1_conv_k5_14

Initial value:

= {
        .N = 4,
        .K = 5,
        .len = 0, 
        .term = CONV_TERM_FLUSH, 
        .next_output = gmr1_conv_k5_14_next_output,
        .next_state  = gmr1_conv_k5_next_state,
}

GMR-1 constraint length 5, rate 1/4 convolutional code.

gmr1_conv_k5_15

const struct osmo_conv_code gmr1_conv_k5_15

Initial value:

= {
        .N = 5,
        .K = 5,
        .len = 0, 
        .term = CONV_TERM_FLUSH, 
        .next_output = gmr1_conv_k5_15_next_output,
        .next_state  = gmr1_conv_k5_next_state,
}

GMR-1 constraint length 5, rate 1/5 convolutional code.

gmr1_conv_k6_14

const struct osmo_conv_code gmr1_conv_k6_14

Initial value:

= {
        .N = 4,
        .K = 6,
        .len = 0, 
        .term = CONV_TERM_FLUSH, 
        .next_output = gmr1_conv_k6_14_next_output,
        .next_state  = gmr1_conv_k6_next_state,
}

GMR-1 constraint length 6, rate 1/4 convolutional code.

gmr1_conv_k9_12

const struct osmo_conv_code gmr1_conv_k9_12

Initial value:

= {
        .N = 2,
        .K = 9,
        .len = 0, 
        .term = CONV_TERM_FLUSH, 
        .next_output = gmr1_conv_k9_12_next_output,
        .next_state  = gmr1_conv_k9_next_state,
}

GMR-1 constraint length 9, rate 1/2 convolutional code.

gmr1_conv_k9_13

const struct osmo_conv_code gmr1_conv_k9_13

Initial value:

= {
        .N = 3,
        .K = 9,
        .len = 0, 
        .term = CONV_TERM_FLUSH, 
        .next_output = gmr1_conv_k9_13_next_output,
        .next_state  = gmr1_conv_k9_next_state,
}

GMR-1 constraint length 9, rate 1/3 convolutional code.

gmr1_conv_k9_14

const struct osmo_conv_code gmr1_conv_k9_14

Initial value:

= {
        .N = 4,
        .K = 9,
        .len = 0, 
        .term = CONV_TERM_FLUSH, 
        .next_output = gmr1_conv_k9_14_next_output,
        .next_state  = gmr1_conv_k9_next_state,
}

GMR-1 constraint length 9, rate 1/4 convolutional code.

gmr1_conv_tch3

const struct osmo_conv_code gmr1_conv_tch3

Initial value:

= {
        .N = 2,
        .K = 7,
        .len = 0, 
        .term = CONV_TERM_TAIL_BITING,
        .next_output = gmr1_conv_tch3_next_output,
        .next_state  = gmr1_conv_tch3_next_state,
}

GMR-1 TCH3 speech tail-biting convolutional code.