Scrambling

Files
file	scramb.h
	Osmocom GMR-1 scrambling header.
file	scramb.c
	Osmocom GMR-1 scrambling implementation.

Macros
#define	GMR1_SCRAMBLE_REG_INIT   0x4d4b

Functions
void	gmr1_scramble_sbit (sbit_t *out, const sbit_t *in, int len)
	Scrambles/Unscrambles a softbit vector. More...
void	gmr1_scramble_ubit (ubit_t *out, const ubit_t *in, int len)
	Scrambles/Unscrambles an unpacked hard bit vector. More...

Detailed Description

Function Documentation

gmr1_scramble_sbit()

void gmr1_scramble_sbit	(	sbit_t *	out,
		const sbit_t *	in,
		int	len
	)

Scrambles/Unscrambles a softbit vector.

Parameters

[out]	out	output sbit_t array
[in]	in	input sbit_t array
[in]	len	length of the array to convert

The output array can be equal to the input array for in-place scrambling/unscrambling

Referenced by gmr1_bcch_decode(), gmr1_ccch_decode(), gmr1_facch3_decode(), gmr1_facch9_decode(), gmr1_rach_decode(), gmr1_tch3_decode(), and gmr1_xch_dc12_decode().

gmr1_scramble_ubit()

void gmr1_scramble_ubit	(	ubit_t *	out,
		const ubit_t *	in,
		int	len
	)

Scrambles/Unscrambles an unpacked hard bit vector.

Parameters

[out]	out	output ubit_t array
[in]	in	input ubit_t array
[in]	len	length of the array to convert

The output array can be equal to the input array for in-place scrambling/unscrambling