ssb_file_test: make duplex and SSB SCS configurable, add new unit test for FDD+15kHz SCS

lib/src/phy/sync/test/CMakeLists.txt

@@ -164,4 +164,6 @@ target_link_libraries(ssb_file_test srsran_phy)
 
 # File test 1
 # Captured with command: lib/examples/usrp_capture -a type=x300,clock=external,sampling_rate=46.08e6,rx_subdev_spec=B:0 -g 20 -r 46.08e6 -n 460800  -f 3502.8e6 -o /tmp/n78.fo35028.fs2304M.data
-add_nr_test(ssb_file_test ssb_file_test -i ${CMAKE_CURRENT_SOURCE_DIR}/n78.fo35028.fs4608M.data -v -r 46.08e6 -f 3502.8e6 -F 3512.64e6 -n 460800 -A 500 357802 2 0 1 0)
+add_nr_test(ssb_file_test_tdd ssb_file_test -i ${CMAKE_CURRENT_SOURCE_DIR}/n78.fo35028.fs4608M.data -v -r 46.08e6 -f 3502.8e6 -F 3512.64e6 -n 460800 -A 500 357802 2 0 1 0)
+# Capture with third-party gNB on band n3 (FDD) 15kHz SSB SCS, f_s=15.36e6, f_c=1842.5e6, f_c_ssb=1842.05e6, PCI=500
+add_nr_test(ssb_file_test_fdd ssb_file_test -i ${CMAKE_CURRENT_SOURCE_DIR}/../../ue/test/ue_dl_nr_pci500_rb52_si_coreset0_idx6_s15.36e6.dat -v -r 15.36e6 -f 1842.5e6 -F 1842.05e6 -n 15360 -d fdd -s 15 -A 500 2200 0 0 0 0)

lib/src/phy/sync/test/ssb_file_test.c

@@ -29,7 +29,7 @@ static char*    filename       = NULL;
 static double   srate_hz       = 23.04e6; // Base-band sampling rate in Hz
 static double   center_freq_hz = NAN;     // Center frequency in Hz
 static double   ssb_freq_hz    = NAN;     // SSB frequency in Hz
-static uint32_t nof_samples    = 0;       // Number of half-frames
+static uint32_t nof_samples    = 0;       // Number of samples
 
 // Assertion
 static bool     assert          = false;
@@ -44,9 +44,11 @@ static void usage(char* prog)
 {
   printf("Usage: %s -i filename [rv]\n", prog);
   printf("\t-r sampling rate in Hz [Default %.2f MHz]\n", srate_hz / 1e6);
+  printf("\t-n number of samples [Default %d]\n", nof_samples);
+  printf("\t-s SSB subcarrier spacing (15, 30) [Default %s]\n", srsran_subcarrier_spacing_to_str(ssb_scs));
+  printf("\t-d duplex mode [Default %s]\n", duplex_mode == SRSRAN_DUPLEX_MODE_FDD ? "FDD" : "TDD");
   printf("\t-f absolute baseband center frequency in Hz [Default %.2f MHz]\n", center_freq_hz / 1e3);
   printf("\t-F absolute SSB center freuqency in Hz [Default %.2f MHz]\n", ssb_freq_hz / 1e3);
-  printf("\t-F absolute SSB center freuqency in Hz [Default %.2f MHz]\n", ssb_freq_hz / 1e3);
   printf("\t-A Assert: PCI t_offset sfn_lsb ssb_idx ssb_k hrf");
   printf("\t-v [set srsran_verbose to debug, default none]\n");
 }
@@ -54,7 +56,7 @@ static void usage(char* prog)
 static void parse_args(int argc, char** argv)
 {
   int opt;
-  while ((opt = getopt(argc, argv, "inrfFAv")) != -1) {
+  while ((opt = getopt(argc, argv, "insdrfFAv")) != -1) {
     switch (opt) {
       case 'i':
         filename = argv[optind];
@@ -62,6 +64,24 @@ static void parse_args(int argc, char** argv)
       case 'n':
         nof_samples = (uint32_t)strtol(argv[optind], NULL, 10);
         break;
+      case 's':
+        if ((uint32_t)strtol(argv[optind], NULL, 10) == 15) {
+          ssb_scs = srsran_subcarrier_spacing_15kHz;
+        } else {
+          ssb_scs = srsran_subcarrier_spacing_30kHz;
+        }
+        break;
+      case 'd':
+        if (strcmp(argv[optind], "tdd") == 0) {
+          duplex_mode = SRSRAN_DUPLEX_MODE_TDD;
+        } else if (strcmp(argv[optind], "fdd") == 0) {
+          duplex_mode = SRSRAN_DUPLEX_MODE_FDD;
+        } else {
+          printf("Invalid duplex mode '%s'\n", argv[optind]);
+          usage(argv[0]);
+          exit(-1);
+        }
+        break;
       case 'r':
         srate_hz = strtod(argv[optind], NULL);
         break;
@@ -195,6 +215,17 @@ int main(int argc, char** argv)
        str,
        search_res.pbch_msg.crc ? "OK" : "KO");
 
+  // unpack MIB
+  srsran_mib_nr_t mib = {};
+  if (srsran_pbch_msg_nr_mib_unpack(&search_res.pbch_msg, &mib) < SRSRAN_SUCCESS) {
+    ERROR("Error unpacking PBCH-MIB");
+    goto clean_exit;
+  }
+
+  char mib_info[512] = {};
+  srsran_pbch_msg_nr_mib_info(&mib, mib_info, sizeof(mib_info));
+  INFO("PBCH-MIB: %s", mib_info);
+
   // Assert search
   if (assert) {
     if (assert_search(&search_res)) {