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changed pdcch_ue_locations to make it clearer

This commit is contained in:
Ismael Gomez 2017-04-11 18:10:03 +02:00
parent eebeaca80e
commit 03c09e6100
1 changed files with 5 additions and 4 deletions
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9
srslte/lib/phch/pdcch.c
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@ -205,7 +205,7 @@ uint32_t srslte_pdcch_ue_locations_ncce(uint32_t nof_cce, srslte_dci_location_t
int l; // this must be int because of the for(;;--) loop
uint32_t i, k, L, m;
uint32_t Yk, ncce;
const int S[4] = { 6, 12, 8, 16 };
const int nof_candidates[4] = { 6, 6, 2, 2};
// Compute Yk for this subframe
Yk = rnti;
@ -217,10 +217,11 @@ uint32_t srslte_pdcch_ue_locations_ncce(uint32_t nof_cce, srslte_dci_location_t
// All aggregation levels from 8 to 1
for (l = 3; l >= 0; l--) {
L = (1 << l);
// For all possible ncce offset
for (i = 0; i < SRSLTE_MIN(nof_cce / L, S[l]/PDCCH_FORMAT_NOF_CCE(l)); i++) {
// For all candidates as given in table 9.1.1-1
for (i = 0; i < nof_candidates[l]; i++) {
if (nof_cce >= L) {
ncce = L * ((Yk + i) % (nof_cce / L));
ncce = L * ((Yk + i) % (nof_cce / L));
// Check if candidate fits in c vector and in CCE region
if (k < max_candidates && ncce + L <= nof_cce)
{
c[k].L = l;