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Merge remote-tracking branch 'origin/NR_UE_cell_search' into integration_2024_w22

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This commit is contained in:
Robert Schmidt
2024-06-03 21:35:51 +02:00
parent 76f06a9386 dac55975b5
commit 5b53f4ee0f
36 changed files with 960 additions and 719 deletions
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common/utils/nr/nr_common.c
+240
View File
@@ -182,6 +182,123 @@ const nr_bandentry_t nr_bandtable[] = {
{261,27500040,28350000,27500040,28350000, 2,2070833, 120}
};
// synchronization raster per band tables (Rel.15)
// (38.101-1 Table 5.4.3.3-1 and 38.101-2 Table 5.4.3.3-1)
// band nb, sub-carrier spacing index, Range of gscn (First, Step size, Last)
// clang-format off
const sync_raster_t sync_raster[] = {
{1, 0, 5279, 1, 5419},
{2, 0, 4829, 1, 4969},
{3, 0, 4517, 1, 4693},
{5, 0, 2177, 1, 2230},
{5, 1, 2183, 1, 2224},
{7, 0, 6554, 1, 6718},
{8, 0, 2318, 1, 2395},
{12, 0, 1828, 1, 1858},
{13, 0, 1871, 1, 1885},
{14, 0, 1901, 1, 1915},
{18, 0, 2156, 1, 2182},
{20, 0, 1982, 1, 2047},
{24, 0, 3818, 1, 3892},
{24, 1, 3824, 1, 3886},
{25, 0, 4829, 1, 4981},
{26, 0, 2153, 1, 2230},
{28, 0, 1901, 1, 2002},
{29, 0, 1798, 1, 1813},
{30, 0, 5879, 1, 5893},
{34, 0, 5030, 1, 5056},
{34, 1, 5036, 1, 5050},
{38, 0, 6431, 1, 6544},
{38, 1, 6437, 1, 6538},
{39, 0, 4706, 1, 4795},
{39, 1, 4712, 1, 4789},
{40, 1, 5762, 1, 5989},
{41, 0, 6246, 3, 6717},
{41, 1, 6252, 3, 6714},
{48, 1, 7884, 1, 7982},
{50, 0, 3584, 1, 3787},
{51, 0, 3572, 1, 3574},
{53, 0, 6215, 1, 6232},
{53, 1, 6221, 1, 6226},
{65, 0, 5279, 1, 5494},
{66, 0, 5279, 1, 5494},
{66, 1, 5285, 1, 5488},
{67, 0, 1850, 1, 1888},
{70, 0, 4993, 1, 5044},
{71, 0, 1547, 1, 1624},
{74, 0, 3692, 1, 3790},
{75, 0, 3584, 1, 3787},
{76, 0, 3572, 1, 3574},
{77, 1, 7711, 1, 8329},
{78, 1, 7711, 1, 8051},
{79, 1, 8480, 16, 8880},
{85, 0, 1826, 1, 1858},
{90, 1, 6252, 1, 6714},
{91, 0, 3572, 1, 3574},
{92, 0, 3584, 1, 3787},
{93, 0, 3572, 1, 3574},
{94, 0, 3584, 1, 3587},
{257, 3, 22388, 1, 22558},
{257, 4, 22390, 2, 22556},
{258, 3, 22257, 1, 22443},
{258, 4, 22258, 2, 22442},
{260, 3, 22995, 1, 23166},
{260, 4, 22996, 2, 23164},
{261, 3, 22446, 1, 22492},
{261, 4, 22446, 2, 22490},
};
// clang-format on
// Section 5.4.3 of 38.101-1 and -2
void check_ssb_raster(uint64_t freq, int band, int scs)
{
int start_gscn = 0, step_gscn = 0, end_gscn = 0;
for (int i = 0; i < sizeof(sync_raster) / sizeof(sync_raster_t); i++) {
if (sync_raster[i].band == band && sync_raster[i].scs_index == scs) {
start_gscn = sync_raster[i].first_gscn;
step_gscn = sync_raster[i].step_gscn;
end_gscn = sync_raster[i].last_gscn;
break;
}
}
AssertFatal(start_gscn != 0, "Couldn't find band %d with SCS %d\n", band, scs);
int gscn;
if (freq < 3000000000) {
int N = 0;
int M = 0;
for (int k = 0; k < 3; k++) {
M = (k << 1) + 1;
if ((freq - M * 50000) % 1200000 == 0) {
N = (freq - M * 50000) / 1200000;
break;
}
}
AssertFatal(N != 0, "SSB frequency %lu Hz not on the synchronization raster (N * 1200kHz + M * 50 kHz)\n", freq);
gscn = (3 * N) + (M - 3) / 2;
} else if (freq < 24250000000) {
AssertFatal((freq - 3000000000) % 1440000 == 0,
"SSB frequency %lu Hz not on the synchronization raster (3000 MHz + N * 1.44 MHz)\n",
freq);
gscn = ((freq - 3000000000) / 1440000) + 7499;
} else {
AssertFatal((freq - 24250080000) % 17280000 == 0,
"SSB frequency %lu Hz not on the synchronization raster (24250.08 MHz + N * 17.28 MHz)\n",
freq);
gscn = ((freq - 24250080000) / 17280000) + 22256;
}
AssertFatal(gscn >= start_gscn && gscn <= end_gscn,
"GSCN %d corresponding to SSB frequency %lu does not belong to GSCN range for band %d\n",
gscn,
freq,
band);
int rel_gscn = gscn - start_gscn;
AssertFatal(rel_gscn % step_gscn == 0,
"GSCN %d corresponding to SSB frequency %lu not in accordance with GSCN step for band %d\n",
gscn,
freq,
band);
}
int get_supported_bw_mhz(frequency_range_t frequency_range, int scs, int nb_rb)
{
int bw_index = get_supported_band_index(scs, frequency_range, nb_rb);
@@ -910,6 +1027,129 @@ uint32_t get_ssb_offset_to_pointA(uint32_t absoluteFrequencySSB,
return ssb_offset_point_a;
}
static double get_start_freq(const double fc, const int nbRB, const int mu)
{
const int scs = MU_SCS(mu) * 1000;
return fc - (nbRB / 2 * NR_NB_SC_PER_RB * scs);
}
static double get_stop_freq(const double fc, const int nbRB, const int mu)
{
int scs = MU_SCS(mu) * 1000;
return fc + (nbRB / 2 * NR_NB_SC_PER_RB * scs);
}
static void compute_M_and_N(const int gscn, int *rM, int *rN)
{
if (gscn > 1 && gscn < 7499) {
for (int M = 1; M < 6; M += 2) {
/* GSCN = 3N + (M-3) / 2
N(int) = 2 * GSCN + 3 - M
*/
if (((2 * gscn + 3 - M) % 6) == 0) {
*rM = M;
*rN = (2 * gscn + 3 - M) / 6;
break;
}
}
} else if (gscn > 7498 && gscn < 22256) {
*rN = gscn - 7499;
} else if (gscn > 22255 && gscn < 26638) {
*rN = gscn - 22256;
} else {
LOG_E(NR_PHY, "Invalid GSCN\n");
abort();
}
}
// Section 5.4.3 of 38.101-1 and -2
static double get_ssref_from_gscn(const int gscn)
{
int M, N = -1;
compute_M_and_N(gscn, &M, &N);
if (gscn > 1 && gscn < 7499) { // Sub 3GHz
AssertFatal(N > 0 && N < 2500, "Invalid N\n");
AssertFatal(M > 0 && M < 6 && (M & 0x1), "Invalid M\n");
return (N * 1200e3 + M * 50e3);
} else if (gscn > 7498 && gscn < 22256) {
AssertFatal(N > -1 && N < 14757, "Invalid N\n");
return (3000e6 + N * 1.44e6);
} else if (gscn > 22255 && gscn < 26638) {
AssertFatal(N > -1 && N < 4382, "Invalid N\n");
return (24250.08e6 + N * 17.28e6);
} else {
LOG_E(NR_PHY, "Invalid GSCN\n");
abort();
}
}
static void find_gscn_to_scan(const double startFreq,
const double stopFreq,
const sync_raster_t gscn,
int *scanGscnStart,
int *scanGscnStop)
{
const double scs = MU_SCS(gscn.scs_index) * 1e3;
const double ssbBW = 20 * NR_NB_SC_PER_RB * scs;
for (int g = gscn.first_gscn; g < gscn.last_gscn; g += gscn.step_gscn) {
const double centerSSBFreq = get_ssref_from_gscn(g);
const double startSSBFreq = centerSSBFreq - ssbBW / 2;
if (startSSBFreq < startFreq)
continue;
*scanGscnStart = g;
break;
}
for (int g = gscn.last_gscn; g > gscn.first_gscn; g -= gscn.step_gscn) {
const double centerSSBFreq = get_ssref_from_gscn(g);
const double stopSSBFreq = centerSSBFreq + ssbBW / 2 - 1;
if (stopSSBFreq > stopFreq)
continue;
*scanGscnStop = g;
break;
}
}
static int get_ssb_first_sc(const double pointA, const double ssbCenter, const int mu)
{
const double scs = MU_SCS(mu) * 1e3;
const int ssbRBs = 20;
return (int)((ssbCenter - pointA) / scs - (ssbRBs / 2 * NR_NB_SC_PER_RB));
}
/* Returns array of first SCS offset in the scanning window */
int get_scan_ssb_first_sc(const double fc, const int nbRB, const int nrBand, const int mu, nr_gscn_info_t ssbInfo[MAX_GSCN_BAND])
{
const double startFreq = get_start_freq(fc, nbRB, mu);
const double stopFreq = get_stop_freq(fc, nbRB, mu);
int scanGscnStart = -1;
int scanGscnStop = -1;
sync_raster_t tmpRaster = {0};
for (const sync_raster_t *r = sync_raster; r < r + (sizeof(sync_raster) / sizeof(sync_raster_t)); r++) {
if (r->band == nrBand && r->scs_index == mu) {
tmpRaster = *r;
break;
}
}
find_gscn_to_scan(startFreq, stopFreq, tmpRaster, &scanGscnStart, &scanGscnStop);
const double scs = MU_SCS(mu) * 1e3;
const double pointA = fc - (nbRB / 2 * scs * NR_NB_SC_PER_RB);
int numGscn = 0;
for (int g = scanGscnStart; (g <= scanGscnStop) && (numGscn < MAX_GSCN_BAND); g += tmpRaster.step_gscn) {
ssbInfo[numGscn].ssRef = get_ssref_from_gscn(g);
ssbInfo[numGscn].ssbFirstSC = get_ssb_first_sc(pointA, ssbInfo[numGscn].ssRef, mu);
ssbInfo[numGscn].gscn = g;
numGscn++;
}
return numGscn;
}
int get_delay_idx(int delay, int max_delay_comp)
{
int delay_idx = max_delay_comp + delay;
common/utils/nr/nr_common.h
+17
View File
@@ -77,6 +77,9 @@ static inline const char *rnti_types(nr_rnti_type_t rr)
}
#undef R
#define MU_SCS(m) (15 << m)
#define MAX_GSCN_BAND 620 // n78 has the highest GSCN range of 619
#define NR_MAX_NB_LAYERS 4 // 8
// Since the IQ samples are represented by SQ15 R+I (see https://en.wikipedia.org/wiki/Q_(number_format)) we need to compensate when
@@ -104,6 +107,12 @@ typedef struct {
int last_gscn;
} sync_raster_t;
typedef struct {
int gscn;
double ssRef;
int ssbFirstSC;
} nr_gscn_info_t;
typedef enum frequency_range_e {
FR1 = 0,
FR2
@@ -238,6 +247,14 @@ void freq2time(uint16_t ofdm_symbol_size,
void nr_est_delay(int ofdm_symbol_size, const c16_t *ls_est, c16_t *ch_estimates_time, delay_t *delay);
int get_scan_ssb_first_sc(const double fc,
const int nbRB,
const int nrBand,
const int mu,
nr_gscn_info_t ssbStartSC[MAX_GSCN_BAND]);
void check_ssb_raster(uint64_t freq, int band, int scs);
#define CEILIDIV(a,b) ((a+b-1)/b)
#define ROUNDIDIV(a,b) (((a<<1)+b)/(b<<1))