mirror of https://github.com/PentHertz/srsLTE.git
chest_sl: tiny refactor and comments
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@ -151,6 +151,7 @@ int srslte_chest_sl_gen_dmrs(srslte_chest_sl_t* q,
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}
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} else {
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for (int i = 0; i < q->nof_dmrs_symbols; i++) {
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// All DMRS symbols have the same cyclic shift
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q->n_CS[i] = cyclic_shift;
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}
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}
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@ -158,7 +159,7 @@ int srslte_chest_sl_gen_dmrs(srslte_chest_sl_t* q,
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case SRSLTE_SIDELINK_PSSCH:
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if (tm <= SRSLTE_SIDELINK_TM2) {
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for (int i = 0; i < q->nof_dmrs_symbols; i++) {
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q->n_CS[i] = (int)(N_x_id / 2) % 8;
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q->n_CS[i] = ((int)floor(N_x_id / 2)) % 8;
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}
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} else {
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// TODO: both equation are the same here but spec says N_id_X for Mode3+4
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@ -180,22 +181,20 @@ int srslte_chest_sl_gen_dmrs(srslte_chest_sl_t* q,
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}
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// Group Hopping
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uint32_t f_gh; // Group Hopping Flag
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uint32_t f_ss;
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uint32_t f_gh = 0; // Group Hopping Flag
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uint32_t f_ss = 0;
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uint32_t u[SRSLTE_SL_MAX_DMRS_SYMB]; // Sequence Group Number
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// 36.211, Section 10.1.4.1.3
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// Base Sequence Number - always 0 for sidelink
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switch (ch) {
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case SRSLTE_SIDELINK_PSBCH:
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f_gh = 0;
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f_ss = (N_sl_id / 16) % SRSLTE_SL_N_RU_SEQ;
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for (int ns = 0; ns < q->nof_dmrs_symbols; ns++) {
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u[ns] = (f_gh + f_ss) % SRSLTE_SL_N_RU_SEQ;
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}
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break;
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case SRSLTE_SIDELINK_PSCCH:
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f_gh = 0;
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if (tm <= SRSLTE_SIDELINK_TM2) {
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f_ss = 0;
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} else {
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@ -228,8 +227,6 @@ int srslte_chest_sl_gen_dmrs(srslte_chest_sl_t* q,
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}
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break;
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case SRSLTE_SIDELINK_PSDCH:
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f_gh = 0;
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f_ss = 0;
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for (int ns = 0; ns < q->nof_dmrs_symbols; ns++) {
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u[ns] = (f_gh + f_ss) % SRSLTE_SL_N_RU_SEQ;
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}
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