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Polar coding update 1of2

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This commit is contained in:
yilmazt
2018-08-22 10:42:29 +02:00
parent 7350475d36
commit a4f8f49eef
20 changed files with 834 additions and 534 deletions
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openair1/PHY/CODING/crc_byte.c
+42 -14
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@@ -36,8 +36,12 @@
/*ref 36-212 v8.6.0 , pp 8-9 */
/* the highest degree is set by default */
unsigned int poly24a = 0x864cfb00; //1000 0110 0100 1100 1111 1011 D^24 + D^23 + D^18 + D^17 + D^14 + D^11 + D^10 + D^7 + D^6 + D^5 + D^4 + D^3 + D + 1
unsigned int poly24b = 0x80006300; // 1000 0000 0000 0000 0110 0011 D^24 + D^23 + D^6 + D^5 + D + 1
unsigned int poly24a = 0x864cfb00; // 1000 0110 0100 1100 1111 1011
// D^24 + D^23 + D^18 + D^17 + D^14 + D^11 + D^10 + D^7 + D^6 + D^5 + D^4 + D^3 + D + 1
unsigned int poly24b = 0x80006300; // 1000 0000 0000 0000 0110 0011
// D^24 + D^23 + D^6 + D^5 + D + 1
unsigned int poly24c = 0xb2b11700; // 1011 0010 1011 0001 0001 0111
// D^24+D^23+D^21+D^20+D^17+D^15+D^13+D^12+D^8+D^4+D^2+D+1
unsigned int poly16 = 0x10210000; // 0001 0000 0010 0001 D^16 + D^12 + D^5 + 1
unsigned int poly12 = 0x80F00000; // 1000 0000 1111 D^12 + D^11 + D^3 + D^2 + D + 1
unsigned int poly8 = 0x9B000000; // 1001 1011 D^8 + D^7 + D^4 + D^3 + D + 1
@@ -49,10 +53,11 @@ For initialization && verification purposes,
The first bit is in the MSB of each byte
*********************************************************/
unsigned int
crcbit (unsigned char * inputptr, int octetlen, unsigned int poly)
unsigned int crcbit (unsigned char * inputptr,
int octetlen,
unsigned int poly)
{
unsigned int i, crc = 0, c;
unsigned int i, crc = 0, c;
while (octetlen-- > 0) {
c = (*inputptr++) << 24;
@@ -75,19 +80,21 @@ crcbit (unsigned char * inputptr, int octetlen, unsigned int poly)
crc table initialization
*********************************************************/
static unsigned int crc24aTable[256];
static unsigned int crc24bTable[256];
static unsigned int crc24aTable[256];
static unsigned int crc24bTable[256];
static unsigned int crc24cTable[256];
static unsigned short crc16Table[256];
static unsigned short crc12Table[256];
static unsigned char crc8Table[256];
void crcTableInit (void)
{
unsigned char c = 0;
unsigned char c = 0;
do {
crc24aTable[c] = crcbit (&c, 1, poly24a);
crc24bTable[c] = crcbit (&c, 1, poly24b);
crc24cTable[c] = crcbit (&c, 1, poly24c);
crc16Table[c] = (unsigned short) (crcbit (&c, 1, poly16) >> 16);
crc12Table[c] = (unsigned short) (crcbit (&c, 1, poly12) >> 16);
crc8Table[c] = (unsigned char) (crcbit (&c, 1, poly8) >> 24);
@@ -99,8 +106,8 @@ Byte by byte implementations,
assuming initial byte is 0 padded (in MSB) if necessary
*********************************************************/
unsigned int
crc24a (unsigned char * inptr, int bitlen)
unsigned int crc24a (unsigned char * inptr,
int bitlen)
{
int octetlen, resbit;
@@ -119,11 +126,11 @@ crc24a (unsigned char * inptr, int bitlen)
return crc;
}
unsigned int crc24b (unsigned char * inptr, int bitlen)
unsigned int crc24b (unsigned char * inptr,
int bitlen)
{
int octetlen, resbit;
unsigned int crc = 0;
int octetlen, resbit;
unsigned int crc = 0;
octetlen = bitlen / 8; /* Change in octets */
resbit = (bitlen % 8);
@@ -138,6 +145,27 @@ unsigned int crc24b (unsigned char * inptr, int bitlen)
return crc;
}
unsigned int crc24c (unsigned char * inptr,
int bitlen)
{
int octetlen, resbit;
unsigned int crc = 0;
octetlen = bitlen / 8; /* Change in octets */
resbit = (bitlen % 8);
while (octetlen-- > 0) {
/*#ifdef DEBUG_CRC24C
printf("crc24c: in %x => crc %x (%x)\n",crc,*inptr,crc24cTable[(*inptr) ^ (crc >> 24)]);
#endif*/
crc = (crc << 8) ^ crc24cTable[(*inptr++) ^ (crc >> 24)];
}
if (resbit > 0)
crc = (crc << resbit) ^ crc24cTable[((*inptr) >> (8 - resbit)) ^ (crc >> (32 - resbit))];
return crc;
}
unsigned int
crc16 (unsigned char * inptr, int bitlen)
{