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Included special case for 64qam

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This commit is contained in:
Sakthivel Velumani
2020-07-30 17:31:28 +02:00
parent 7bcf468e1b
commit 82be36533b
1 changed files with 23 additions and 7 deletions
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openair1/PHY/MODULATION/nr_modulation.c
+23 -7
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@@ -29,20 +29,36 @@ void nr_modulation(uint32_t *in,
int16_t *out) int16_t *out)
{ {
uint16_t offset; uint16_t offset;
uint8_t idx, b_idx; uint16_t mask = ((1<<mod_order)-1);
uint8_t idx;
offset = (mod_order==2)? NR_MOD_TABLE_QPSK_OFFSET : (mod_order==4)? NR_MOD_TABLE_QAM16_OFFSET : \ offset = (mod_order==2)? NR_MOD_TABLE_QPSK_OFFSET : (mod_order==4)? NR_MOD_TABLE_QAM16_OFFSET : \
(mod_order==6)? NR_MOD_TABLE_QAM64_OFFSET: (mod_order==8)? NR_MOD_TABLE_QAM256_OFFSET : 0; (mod_order==6)? NR_MOD_TABLE_QAM64_OFFSET: (mod_order==8)? NR_MOD_TABLE_QAM256_OFFSET : 0;
LOG_D(PHY,"nr_modulation: length %d, mod_order %d\n",length,mod_order); LOG_D(PHY,"nr_modulation: length %d, mod_order %d\n",length,mod_order);
uint16_t mask = ((1<<mod_order)-1); if (mod_order==6) {
for (int i=0; i<length/mod_order; i++) uint16_t u = 1;
{ uint8_t shift_lut[3] = {0, 2, 4};
idx = ((in[i*mod_order/32]>>(i*mod_order)) & mask); for (int i=0; i<length/mod_order; i++)
{
idx = ((in[i*mod_order/32]>>((i*mod_order)&0x1f)) & mask);
if ((((i+1)*mod_order)>32*u) && (i!=0))
idx |= (in[(i*mod_order/32)+1]<<shift_lut[(u++)%3]) & 0x3f;
else if (((i+1)*mod_order)==32*u) u++;
out[i<<1] = nr_mod_table[(offset+idx)<<1]; out[i<<1] = nr_mod_table[(offset+idx)<<1];
out[(i<<1)+1] = nr_mod_table[((offset+idx)<<1)+1]; out[(i<<1)+1] = nr_mod_table[((offset+idx)<<1)+1];
}
}
else {
for (int i=0; i<length/mod_order; i++)
{
idx = ((in[i*mod_order/32]>>((i*mod_order)&0x1f)) & mask);
out[i<<1] = nr_mod_table[(offset+idx)<<1];
out[(i<<1)+1] = nr_mod_table[((offset+idx)<<1)+1];
}
} }
} }