From b4d650e4f5d242b7d759666e5eb83aeebc2a9c94 Mon Sep 17 00:00:00 2001
From: Florian Kaltenberger <florian.kaltenberger@eurecom.fr>
Date: Tue, 19 Apr 2016 15:44:30 +0200
Subject: [PATCH] usrp_lib: setting master clock rate to 30.72 and filter to
20MHz for all cases to improve noise figure and channel response
---
targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
diff --git a/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp b/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
index ece81dc7c3..bc60c1f7c8 100644
--- a/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
+++ b/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
@@ -597,9 +597,10 @@ extern "C" {
openair0_cfg[0].rx_gain_calib_table = calib_table_b210_38;
bw_gain_adjust=1;
}
+ s->usrp->set_master_clock_rate(30.72e6);
+
switch ((int)openair0_cfg[0].sample_rate) {
case 30720000:
- s->usrp->set_master_clock_rate(30.72e6);
// from usrp_time_offset
openair0_cfg[0].samples_per_packet = 4096;
openair0_cfg[0].tx_sample_advance = 115;
@@ -608,7 +609,6 @@ extern "C" {
openair0_cfg[0].tx_scheduling_advance = 11*openair0_cfg[0].samples_per_packet;
break;
case 23040000:
- s->usrp->set_master_clock_rate(46.08e6);
openair0_cfg[0].samples_per_packet = 2048;
openair0_cfg[0].tx_sample_advance = 113;
openair0_cfg[0].tx_bw = 20e6;
@@ -616,27 +616,24 @@ extern "C" {
openair0_cfg[0].tx_scheduling_advance = 8*openair0_cfg[0].samples_per_packet;
break;
case 15360000:
- s->usrp->set_master_clock_rate(30.72e6);
openair0_cfg[0].samples_per_packet = 2048;
openair0_cfg[0].tx_sample_advance = 113;
- openair0_cfg[0].tx_bw = 10e6;
- openair0_cfg[0].rx_bw = 10e6;
+ openair0_cfg[0].tx_bw = 20e6;
+ openair0_cfg[0].rx_bw = 20e6;
openair0_cfg[0].tx_scheduling_advance = 5*openair0_cfg[0].samples_per_packet;
break;
case 7680000:
- s->usrp->set_master_clock_rate(30.72e6);
openair0_cfg[0].samples_per_packet = 1024;
openair0_cfg[0].tx_sample_advance = 70;//103;
- openair0_cfg[0].tx_bw = 5e6;
- openair0_cfg[0].rx_bw = 5e6;
+ openair0_cfg[0].tx_bw = 20e6;
+ openair0_cfg[0].rx_bw = 20e6;
openair0_cfg[0].tx_scheduling_advance = 5*openair0_cfg[0].samples_per_packet;
break;
case 1920000:
- s->usrp->set_master_clock_rate(30.72e6);
openair0_cfg[0].samples_per_packet = 256;
openair0_cfg[0].tx_sample_advance = 40;
- openair0_cfg[0].tx_bw = 1.25e6;
- openair0_cfg[0].rx_bw = 1.25e6;
+ openair0_cfg[0].tx_bw = 20e6;
+ openair0_cfg[0].rx_bw = 20e6;
openair0_cfg[0].tx_scheduling_advance = 8*openair0_cfg[0].samples_per_packet;
break;
default:
--
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