transceiver: Add Rx samples-per-symbol option
Previous approach was to enable 4 SPS on the receive path only
for EDGE use, which is not a requirement for 4 SPS operation.
Make the 4 SPS configuration setting directly settable.
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
diff --git a/Transceiver52M/osmo-trx.cpp b/Transceiver52M/osmo-trx.cpp
index f4b585e..241e69c 100644
--- a/Transceiver52M/osmo-trx.cpp
+++ b/Transceiver52M/osmo-trx.cpp
@@ -221,10 +221,6 @@
{
RadioInterface *radio = NULL;
- if ((config->rx_sps != 1) && (type != RadioDevice::NORMAL)) {
- LOG(ALERT) << "Unsupported radio interface configuration";
- }
-
switch (type) {
case RadioDevice::NORMAL:
radio = new RadioInterface(usrp, config->tx_sps,
@@ -314,7 +310,8 @@
" -e Enable EDGE receiver\n"
" -d Enable dual channel diversity receiver\n"
" -x Enable external 10 MHz reference\n"
- " -s Samples-per-symbol (1 or 4)\n"
+ " -s Tx samples-per-symbol (1 or 4)\n"
+ " -b Rx samples-per-symbol (1 or 4)\n"
" -c Number of ARFCN channels (default=1)\n"
" -f Enable C0 filler table\n"
" -o Set baseband frequency offset (default=auto)\n"
@@ -343,7 +340,7 @@
config->swap_channels = false;
config->edge = false;
- while ((option = getopt(argc, argv, "ha:l:i:p:c:dxfo:s:r:A:R:Se")) != -1) {
+ while ((option = getopt(argc, argv, "ha:l:i:p:c:dxfo:s:b:r:A:R:Se")) != -1) {
switch (option) {
case 'h':
print_help();
@@ -379,6 +376,9 @@
case 's':
config->tx_sps = atoi(optarg);
break;
+ case 'b':
+ config->rx_sps = atoi(optarg);
+ break;
case 'r':
config->rtsc = atoi(optarg);
config->filler = Transceiver::FILLER_NORM_RAND;
@@ -403,6 +403,12 @@
}
}
+ /* Force 4 SPS for EDGE configurations */
+ if (config->edge) {
+ config->tx_sps = 4;
+ config->rx_sps = 4;
+ }
+
if (config->edge && (config->filler == Transceiver::FILLER_NORM_RAND))
config->filler = Transceiver::FILLER_EDGE_RAND;
@@ -412,12 +418,6 @@
exit(0);
}
- if (config->edge && (config->tx_sps != 4)) {
- printf("EDGE only supported at 4 samples per symbol\n\n");
- print_help();
- exit(0);
- }
-
if (config->rtsc > 7) {
printf("Invalid training sequence %i\n\n", config->rtsc);
print_help();