From 382f56fbeabd0b3d4569d8f716f9686016a2c1e1 Mon Sep 17 00:00:00 2001
From: Andre Puschmann <andre@softwareradiosystems.com>
Date: Mon, 23 Nov 2020 22:02:31 +0100
Subject: [PATCH] pdsch_{ue,enodeb}: add -Q switch to enable use of standard
 LTE rates

this is useful for RF equipment that doesn't support the shorter symbol
size we use by default, e.g. the N310
---
 lib/examples/pdsch_enodeb.c | 11 +++++++++--
 lib/examples/pdsch_ue.c     |  9 ++++++++-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/lib/examples/pdsch_enodeb.c b/lib/examples/pdsch_enodeb.c
index 6146c4438..191ca8078 100644
--- a/lib/examples/pdsch_enodeb.c
+++ b/lib/examples/pdsch_enodeb.c
@@ -75,7 +75,8 @@ static char*       rf_args              = "";
 static char*       rf_dev               = "";
 static float       rf_amp = 0.8, rf_gain = 60.0, rf_freq = 2400000000;
 static bool        enable_256qam   = false;
-static float       output_file_snr = +INFINITY;
+static float       output_file_snr       = +INFINITY;
+static bool        use_standard_lte_rate = false;
 
 static bool                    null_file_sink = false;
 static srslte_filesink_t       fsink;
@@ -140,6 +141,7 @@ static void usage(char* prog)
   printf("\t-v [set srslte_verbose to debug, default none]\n");
   printf("\t-s output file SNR [Default %f]\n", output_file_snr);
   printf("\t-q Enable/Disable 256QAM modulation (default %s)\n", enable_256qam ? "enabled" : "disabled");
+  printf("\t-Q Use standard LTE sample rates (default %s)\n", use_standard_lte_rate ? "enabled" : "disabled");
   printf("\n");
   printf("\t*: See 3GPP 36.212 Table  5.3.3.1.5-4 for more information\n");
 }
@@ -147,7 +149,7 @@ static void usage(char* prog)
 static void parse_args(int argc, char** argv)
 {
   int opt;
-  while ((opt = getopt(argc, argv, "IadglfmoncpqvutxbwMsB")) != -1) {
+  while ((opt = getopt(argc, argv, "IadglfmoncpqvutxbwMsBQ")) != -1) {
 
     switch (opt) {
       case 'I':
@@ -207,6 +209,9 @@ static void parse_args(int argc, char** argv)
       case 'q':
         enable_256qam ^= true;
         break;
+      case 'Q':
+        use_standard_lte_rate ^= true;
+        break;
       default:
         usage(argv[0]);
         exit(-1);
@@ -708,6 +713,8 @@ int main(int argc, char** argv)
 
   parse_args(argc, argv);
 
+  srslte_use_standard_symbol_size(use_standard_lte_rate);
+
   uint8_t mch_table[10];
   bzero(&mch_table[0], sizeof(uint8_t) * 10);
   if (mbsfn_area_id > -1) {
diff --git a/lib/examples/pdsch_ue.c b/lib/examples/pdsch_ue.c
index 4e8819365..1025c8d13 100644
--- a/lib/examples/pdsch_ue.c
+++ b/lib/examples/pdsch_ue.c
@@ -109,6 +109,7 @@ typedef struct {
   int      sf_config;
   int      verbose;
   bool     enable_256qam;
+  bool     use_standard_lte_rate;
 } prog_args_t;
 
 void args_default(prog_args_t* args)
@@ -195,6 +196,7 @@ void usage(prog_args_t* args, char* prog)
   printf("\t-M MBSFN area id [Default %d]\n", args->mbsfn_area_id);
   printf("\t-N Non-MBSFN region [Default %d]\n", args->non_mbsfn_region);
   printf("\t-q Enable/Disable 256QAM modulation (default %s)\n", args->enable_256qam ? "enabled" : "disabled");
+  printf("\t-Q Use standard LTE sample rates (default %s)\n", args->use_standard_lte_rate ? "enabled" : "disabled");
   printf("\t-v [set srslte_verbose to debug, default none]\n");
 }
 
@@ -203,7 +205,7 @@ void parse_args(prog_args_t* args, int argc, char** argv)
   int opt;
   args_default(args);
 
-  while ((opt = getopt(argc, argv, "adAogliIpPcOCtdDFRqnvrfuUsSZyWMNBTG")) != -1) {
+  while ((opt = getopt(argc, argv, "adAogliIpPcOCtdDFRqnvrfuUsSZyWMNBTGQ")) != -1) {
     switch (opt) {
       case 'i':
         args->input_file_name = argv[optind];
@@ -308,6 +310,9 @@ void parse_args(prog_args_t* args, int argc, char** argv)
       case 'q':
         args->enable_256qam ^= true;
         break;
+      case 'Q':
+        args->use_standard_lte_rate ^= true;
+        break;
       default:
         usage(args, argv[0]);
         exit(-1);
@@ -396,6 +401,8 @@ int main(int argc, char** argv)
 
   parse_args(&prog_args, argc, argv);
 
+  srslte_use_standard_symbol_size(prog_args.use_standard_lte_rate);
+
 #ifdef ENABLE_GUI
   if (prog_args.mbsfn_area_id > -1) {
     enable_mbsfn_plot = true;