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Consider the ratio of PUSCH EPRE to DMRS EPRE when calculating PUSCH DMRS power scaling

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This commit is contained in:
alexjiao
2025-04-17 14:23:03 +02:00
committed by Robert Schmidt
parent b5f7d22c02
commit 570c1b5639
7 changed files with 47 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files
common/utils/nr/nr_common.c
+13
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@@ -36,6 +36,7 @@
#include "common/utils/LOG/log.h"
#include "nr_common.h"
#include <limits.h>
#include <math.h>
#define C_SRS_NUMBER (64)
#define B_SRS_NUMBER (4)
@@ -1427,3 +1428,15 @@ frequency_range_t get_freq_range_from_band(uint16_t band)
{
return band <= 256 ? FR1 : FR2;
}
float get_beta_dmrs_pusch(int num_cdm_groups_no_data, pusch_dmrs_type_t dmrs_type)
{
float beta_dmrs_pusch = 1.0;
if (num_cdm_groups_no_data == 2) {
beta_dmrs_pusch = powf(10.0, 3.0 / 20.0);
} else if (num_cdm_groups_no_data == 3) {
if (dmrs_type == pusch_dmrs_type2)
beta_dmrs_pusch = powf(10.0, 4.77 / 20.0);
}
return beta_dmrs_pusch;
}
common/utils/nr/nr_common.h
+16
View File
@@ -123,6 +123,11 @@ typedef enum frequency_range_e {
FR2
} frequency_range_t;
typedef enum {
pusch_dmrs_type1 = 0,
pusch_dmrs_type2 = 1
} pusch_dmrs_type_t;
#define MAX_NUM_SLOTS_ALLOWED 80 // up to numerology 3 (120 KHz SCS) is supported
enum slot_type { TDD_NR_DOWNLINK_SLOT, TDD_NR_UPLINK_SLOT, TDD_NR_MIXED_SLOT };
@@ -295,6 +300,17 @@ frequency_range_t get_freq_range_from_freq(uint64_t freq);
frequency_range_t get_freq_range_from_arfcn(uint32_t arfcn);
frequency_range_t get_freq_range_from_band(uint16_t band);
/**
* @brief Calculates the scaling factor for the ratio of PUSCH EPRE to DMRS EPRE.
*
* @param num_cdm_groups_no_data The number of CDM groups without data.
* @param dmrs_type The DMRS type.
* @return The calculated beta scaling factor for the ratio of PUSCH EPRE to DMRS EPRE.
*
* @note The values are derived from TS 38.214 Table 6.2.2-1.
*/
float get_beta_dmrs_pusch(int num_cdm_groups_no_data, pusch_dmrs_type_t dmrs_type);
#define CEILIDIV(a,b) ((a+b-1)/b)
#define ROUNDIDIV(a,b) (((a<<1)+b)/(b<<1))
openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
+6 -1
View File
@@ -19,6 +19,7 @@
* contact@openairinterface.org
*/
#include "nr_common.h"
#include <string.h>
#include "nr_ul_estimation.h"
@@ -480,6 +481,9 @@ int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
pusch_pdu->scid,
Ns,
symbol);
pusch_dmrs_type_t dmrs_type = pusch_pdu->dmrs_config_type == NFAPI_NR_DMRS_TYPE1 ? pusch_dmrs_type1 : pusch_dmrs_type2;
float beta_dmrs_pusch = get_beta_dmrs_pusch(pusch_pdu->num_dmrs_cdm_grps_no_data, dmrs_type);
int16_t dmrs_scaling = (1 / beta_dmrs_pusch) * (1 << 14);
nr_pusch_dmrs_rx(gNB,
Ns,
gold,
@@ -488,7 +492,8 @@ int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
0,
nb_rb_pusch,
(pusch_pdu->bwp_start + pusch_pdu->rb_start) * NR_NB_SC_PER_RB,
pusch_pdu->dmrs_config_type);
pusch_pdu->dmrs_config_type,
dmrs_scaling);
} else { // if transform precoding or SC-FDMA is enabled in Uplink
// NR_SC_FDMA supports type1 DMRS so only 6 DMRS REs per RB possible
const int index = get_index_for_dmrs_lowpapr_seq(nb_rb_pusch * (NR_NB_SC_PER_RB / 2));
openair1/PHY/NR_REFSIG/nr_dmrs_rx.c
+4 -1
View File
@@ -34,6 +34,7 @@
//#define NR_PBCH_DMRS_LENGTH 144
//#define DEBUG_PUSCH
#include "PHY/TOOLS/tools_defs.h"
#include "refsig_defs_ue.h"
#include "PHY/defs_nr_UE.h"
#include "nr_refsig.h"
@@ -73,7 +74,8 @@ int nr_pusch_dmrs_rx(PHY_VARS_gNB *gNB,
unsigned char lp,
unsigned short nb_pusch_rb,
uint32_t re_offset,
uint8_t dmrs_type)
uint8_t dmrs_type,
int16_t dmrs_scaling)
{
typedef int array_of_w[2];
const array_of_w *wf = (dmrs_type == pusch_dmrs_type1) ? wf1 : wf2;
@@ -91,6 +93,7 @@ int nr_pusch_dmrs_rx(PHY_VARS_gNB *gNB,
int i = k + dmrs_offset;
int w = (wf[p - 1000][i & 1]) * (wt[p - 1000][lp]);
output[k] = get_modulated(nr_gold_pusch, i, w == 1);
output[k] = c16mulRealShift(output[k], dmrs_scaling, 14);
#ifdef DEBUG_PUSCH
printf("nr_pusch_dmrs_rx dmrs config type %d port %d nb_pusch_rb %d\n", dmrs_type, p, nb_pusch_rb);
printf("wf[%d] = %d wt[%d]= %d\n", i&1, wf[p-1000][i&1], lp, wt[p-1000][lp]);
openair1/PHY/NR_REFSIG/nr_refsig.h
+2 -1
View File
@@ -36,7 +36,8 @@ int nr_pusch_dmrs_rx(PHY_VARS_gNB *gNB,
unsigned char lp,
unsigned short nb_pusch_rb,
uint32_t re_offset,
uint8_t dmrs_type);
uint8_t dmrs_type,
int16_t dmrs_scaling);
void nr_generate_csi_rs(const NR_DL_FRAME_PARMS *frame_parms,
int32_t **dataF,
openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c
+6 -4
View File
@@ -392,13 +392,15 @@ static void dmrs_amp_mult(const uint32_t dmrs_port,
const c16_t *mod_dmrs,
c16_t *mod_dmrs_out,
const uint32_t n_dmrs,
const pusch_dmrs_type_t dmrs_type)
const pusch_dmrs_type_t dmrs_type,
const unsigned int num_cdm_groups_no_data)
{
float beta_dmrs_pusch = get_beta_dmrs_pusch(num_cdm_groups_no_data, dmrs_type);
/* short array that hold amplitude for k_prime = 0 and k_prime = 1 */
int32_t alpha_dmrs[2] __attribute((aligned(16)));
for (int_fast8_t i = 0; i < sizeofArray(alpha_dmrs); i++) {
const int32_t a = Wf[i] * Wt * AMP;
alpha_dmrs[i] = a;
alpha_dmrs[i] = a * beta_dmrs_pusch;
}
/* multiply amplitude with complex DMRS vector */
@@ -440,9 +442,9 @@ static void map_symbols(const nr_phy_pxsch_params_t p,
c16_t mod_dmrs[ALNARS_16_4(n_dmrs)] __attribute((aligned(16)));
if (p.transform_precoding == transformPrecoder_disabled) {
nr_modulation(gold, n_dmrs * 2, DMRS_MOD_ORDER, (int16_t *)mod_dmrs);
dmrs_amp_mult(p.dmrs_port, p.Wt, p.Wf, mod_dmrs, mod_dmrs_amp, n_dmrs, p.dmrs_type);
dmrs_amp_mult(p.dmrs_port, p.Wt, p.Wf, mod_dmrs, mod_dmrs_amp, n_dmrs, p.dmrs_type, p.num_cdm_no_data);
} else {
dmrs_amp_mult(p.dmrs_port, p.Wt, p.Wf, dmrs_seq, mod_dmrs_amp, n_dmrs, p.dmrs_type);
dmrs_amp_mult(p.dmrs_port, p.Wt, p.Wf, dmrs_seq, mod_dmrs_amp, n_dmrs, p.dmrs_type, p.num_cdm_no_data);
}
} else if ((p.pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) && ptrs_symbol) {
AssertFatal(p.transform_precoding == transformPrecoder_disabled, "PTRS NOT SUPPORTED IF TRANSFORM PRECODING IS ENABLED\n");
openair1/PHY/impl_defs_nr.h
-6
View File
@@ -344,12 +344,6 @@ typedef enum {
* DESCRIPTION : configuration for PUSCH
*
************************************************************************/
typedef enum {
pusch_dmrs_type1 = 0,
pusch_dmrs_type2 = 1
} pusch_dmrs_type_t;
typedef enum {
txConfig_codebook = 1,
txConfig_nonCodebook = 2