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Diffstat (limited to 'gssm/src/lib/cch.h')
| -rw-r--r-- | gssm/src/lib/cch.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/gssm/src/lib/cch.h b/gssm/src/lib/cch.h new file mode 100644 index 0000000..bb1d629 --- /dev/null +++ b/gssm/src/lib/cch.h @@ -0,0 +1,42 @@ +// $Id: cch.h,v 1.1.1.1 2007-06-01 04:26:57 jl Exp $ + +/* + * decode_cch + * + * Decode a "common" control channel. Most control channels use + * the same burst, interleave, Viterbi and parity configuration. + * The documentation for the control channels defines SACCH first + * and then just keeps referring to that. + * + * The current (investigated) list is as follows: + * + * BCCH Norm + * BCCH Ext + * PCH + * AGCH + * CBCH (SDCCH/4) + * CBCH (SDCCH/8) + * SDCCH/4 + * SACCH/C4 + * SDCCH/8 + * SACCH/C8 + * + * We provide two functions, one for where all four bursts are + * contiguous, and one where they aren't. + */ + +#define DATA_BLOCK_SIZE 184 +#define PARITY_SIZE 40 +#define FLUSH_BITS_SIZE 4 +#define PARITY_OUTPUT_SIZE (DATA_BLOCK_SIZE + PARITY_SIZE + FLUSH_BITS_SIZE) + +#define CONV_INPUT_SIZE PARITY_OUTPUT_SIZE +#define CONV_SIZE (2 * CONV_INPUT_SIZE) + +#define BLOCKS 4 +#define iBLOCK_SIZE (CONV_SIZE / BLOCKS) +#define eBLOCK_SIZE (iBLOCK_SIZE + 2) + +unsigned char *decode_cch(unsigned char *, unsigned char *, unsigned char *, + unsigned char *, unsigned int *); +unsigned char *decode_cch(unsigned char *, unsigned int *); |