Commit cedde4ad authored by laurent's avatar laurent

realtime for UE

parent 3bf8768d
......@@ -65,7 +65,7 @@ _Assert_(cOND, _Assert_Exit_, #vALUE1 ": %" PRIdMAX "\n" #vALUE2 ": %" PRIdMAX "
(intmax_t)vALUE1, (intmax_t)vALUE2, (intmax_t)vALUE3)
#define DevCheck4(cOND, vALUE1, vALUE2, vALUE3, vALUE4) \
_Assert_(cOND, _Assert_Exit_, #vALUE1": %"PRIdMAX"\n"#vALUE2": %"PRIdMAX"\n"#vALUE3": %"PRIdMAX"\n"#vALUE4": %"PRIdMAX"\n\n", \
_Assert_(cOND, _Assert_Exit_, #vALUE1": %" PRIdMAX "\n" #vALUE2 ": %" PRIdMAX "\n" #vALUE3 ": %" PRIdMAX "\n" #vALUE4 ": %" PRIdMAX "\n\n", \
(intmax_t)vALUE1, (intmax_t)vALUE2, (intmax_t)vALUE3, (intmax_t)vALUE4)
#define DevParam(vALUE1, vALUE2, vALUE3) DevCheck(0, vALUE1, vALUE2, vALUE3)
......
......@@ -371,6 +371,9 @@ typedef struct {
pthread_mutex_t mutex_rxtx;
/// scheduling parameters for RXn-TXnp4 thread
struct sched_param sched_param_rxtx;
int sub_frame_start;
int sub_frame_step;
unsigned long long gotIQs;
} UE_rxtx_proc_t;
/// Context data structure for eNB subframe processing
......
......@@ -255,7 +255,7 @@ typedef struct protocol_ctxt_s {
(Ctxt_Pp)->subframe = sUBfRAME; \
PROTOCOL_CTXT_COMPUTE_MODULE_ID(Ctxt_Pp)
#define PROTOCOL_CTXT_FMT "[FRAME %05u][%s][MOD %02u][RNTI %"PRIx16"]"
#define PROTOCOL_CTXT_FMT "[FRAME %05u][%s][MOD %02u][RNTI %" PRIx16 "]"
#define PROTOCOL_CTXT_ARGS(CTXT_Pp) \
(CTXT_Pp)->frame, \
((CTXT_Pp)->enb_flag == ENB_FLAG_YES) ? "eNB":" UE", \
......
......@@ -53,6 +53,26 @@
extern "C" {
#endif
extern double cpuf;
static inline unsigned long long rdtsc(void) {
unsigned long long a, d;
__asm__ volatile ("rdtsc" : "=a" (a), "=d" (d));
return (d<<32) | a;
}
static inline unsigned long long checkT(int timeout, char * file, int line) {
static unsigned long long __thread last=0;
unsigned long long cur=rdtsc();
int microCycles=(int)(cpuf*1000);
int duration=(int)((cur-last)/microCycles);
if ( last!=0 && duration > timeout )
printf("%s:%d lte-ue delay %d (exceed %d)\n", file, line,
duration, timeout);
last=cur;
return cur;
}
#define check(a) checkT(a,__FILE__,__LINE__)
/** @defgroup _LOG LOG Generator
* @{*/
/* @}*/
......
......@@ -40,10 +40,12 @@
#include <time.h>
#include "UTIL/LOG/log_extern.h"
#include "common_lib.h"
#include "assertions.h"
#ifdef __SSE4_1__
# include <smmintrin.h>
#endif
#ifdef __AVX2__
# include <immintrin.h>
#endif
......@@ -56,16 +58,14 @@
* @{
*/
/*! \brief USRP Configuration */
typedef struct
{
/*! \brief USRP Configuration */
typedef struct {
// --------------------------------
// variables for USRP configuration
// --------------------------------
//! USRP device pointer
uhd::usrp::multi_usrp::sptr usrp;
//uhd::usrp::multi_usrp::sptr rx_usrp;
// --------------------------------
// variables for USRP configuration
// --------------------------------
//! USRP device pointer
uhd::usrp::multi_usrp::sptr usrp;
//create a send streamer and a receive streamer
//! USRP TX Stream
......@@ -78,141 +78,93 @@ typedef struct
//! USRP RX Metadata
uhd::rx_metadata_t rx_md;
//! USRP Timestamp Information
uhd::time_spec_t tm_spec;
//setup variables and allocate buffer
//! USRP Metadata
uhd::async_metadata_t async_md;
//! Sampling rate
double sample_rate;
//! Sampling rate
double sample_rate;
//! TX forward samples. We use usrp_time_offset to get this value
int tx_forward_nsamps; //166 for 20Mhz
//! time offset between transmiter timestamp and receiver timestamp;
double tdiff;
//! TX forward samples. We use usrp_time_offset to get this value
int tx_forward_nsamps; //166 for 20Mhz
// --------------------------------
// Debug and output control
// --------------------------------
int num_underflows;
int num_overflows;
int num_seq_errors;
int64_t tx_count;
int64_t rx_count;
//! timestamp of RX packet
openair0_timestamp rx_timestamp;
} usrp_state_t;
// --------------------------------
// Debug and output control
// --------------------------------
//! Number of underflows
int num_underflows;
//! Number of overflows
int num_overflows;
//! Number of sequential errors
int num_seq_errors;
//! tx count
int64_t tx_count;
//! rx count
int64_t rx_count;
//! timestamp of RX packet
openair0_timestamp rx_timestamp;
} usrp_state_t;
/*! \brief Called to start the USRP transceiver. Return 0 if OK, < 0 if error
@param device pointer to the device structure specific to the RF hardware target
*/
static int trx_usrp_start(openair0_device *device)
{
usrp_state_t *s = (usrp_state_t*)device->priv;
static int trx_usrp_start(openair0_device *device) {
// init recv and send streaming
uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
cmd.time_spec = s->usrp->get_time_now() + uhd::time_spec_t(0.05);
cmd.stream_now = false; // start at constant delay
s->rx_stream->issue_stream_cmd(cmd);
usrp_state_t *s = (usrp_state_t*)device->priv;
s->tx_md.time_spec = cmd.time_spec + uhd::time_spec_t(1-(double)s->tx_forward_nsamps/s->sample_rate);
s->tx_md.has_time_spec = true;
s->tx_md.start_of_burst = true;
s->tx_md.end_of_burst = false;
// init recv and send streaming
uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
cmd.time_spec = s->usrp->get_time_now() + uhd::time_spec_t(0.05);
cmd.stream_now = true;
s->rx_stream->issue_stream_cmd(cmd);
s->tx_md.time_spec = cmd.time_spec + uhd::time_spec_t(1-(double)s->tx_forward_nsamps/s->sample_rate);
s->tx_md.has_time_spec = true;
s->tx_md.start_of_burst = true;
s->tx_md.end_of_burst = false;
s->rx_count = 0;
s->tx_count = 0;
s->rx_timestamp = 0;
return 0;
s->rx_count = 0;
s->tx_count = 0;
s->rx_timestamp = 0;
return 0;
}
/*! \brief Terminate operation of the USRP transceiver -- free all associated resources
* \param device the hardware to use
*/
static void trx_usrp_end(openair0_device *device)
{
usrp_state_t *s = (usrp_state_t*)device->priv;
static void trx_usrp_end(openair0_device *device) {
usrp_state_t *s = (usrp_state_t*)device->priv;
s->rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
s->rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
//send a mini EOB packet
s->tx_md.end_of_burst = true;
s->tx_stream->send("", 0, s->tx_md);
s->tx_md.end_of_burst = false;
//send a mini EOB packet
s->tx_md.end_of_burst = true;
s->tx_stream->send("", 0, s->tx_md);
s->tx_md.end_of_burst = false;
}
/*! \brief Called to send samples to the USRP RF target
@param device pointer to the device structure specific to the RF hardware target
@param timestamp The timestamp at whicch the first sample MUST be sent
@param timestamp The timestamp at whicch the first sample MUST be sent
@param buff Buffer which holds the samples
@param nsamps number of samples to be sent
@param antenna_id index of the antenna if the device has multiple anteannas
@param flags flags must be set to TRUE if timestamp parameter needs to be applied
*/
static int trx_usrp_write(openair0_device *device, openair0_timestamp timestamp, void **buff, int nsamps, int cc, int flags)
{
static long long int loop=0;
static long time_min=0, time_max=0, time_avg=0;
struct timespec tp_start, tp_end;
long time_diff;
clock_gettime(CLOCK_MONOTONIC_RAW, &tp_start);
int ret=0, ret_i=0;
usrp_state_t *s = (usrp_state_t*)device->priv;
*/
static int trx_usrp_write(openair0_device *device, openair0_timestamp timestamp, void **buff, int nsamps, int cc, int flags) {
int ret=0;
usrp_state_t *s = (usrp_state_t*)device->priv;
s->tx_md.time_spec = uhd::time_spec_t::from_ticks(timestamp, s->sample_rate);
s->tx_md.time_spec = uhd::time_spec_t::from_ticks(timestamp, s->sample_rate);
s->tx_md.has_time_spec = flags;
if(flags)
s->tx_md.has_time_spec = true;
else
s->tx_md.has_time_spec = false;
if (cc>1) {
std::vector<void *> buff_ptrs;
for (int i=0;i<cc;i++) buff_ptrs.push_back(buff[i]);
ret = (int)s->tx_stream->send(buff_ptrs, nsamps, s->tx_md,1e-3);
}
else
ret = (int)s->tx_stream->send(buff[0], nsamps, s->tx_md,1e-3);
if (cc>1) {
std::vector<void *> buff_ptrs;
for (int i=0; i<cc; i++)
buff_ptrs.push_back(buff[i]);
ret = (int)s->tx_stream->send(buff_ptrs, nsamps, s->tx_md,1e-3);
} else
ret = (int)s->tx_stream->send(buff[0], nsamps, s->tx_md,1e-3);
s->tx_md.start_of_burst = false;
s->tx_md.start_of_burst = false;
if (ret != nsamps) {
printf("[xmit] tx samples %d != %d\n",ret,nsamps);
}
if (ret != nsamps)
LOG_E(PHY,"[xmit] tx samples %d != %d\n",ret,nsamps);
clock_gettime(CLOCK_MONOTONIC_RAW, &tp_end);
time_diff = (tp_end.tv_sec - tp_start.tv_sec) *1E09 + (tp_end.tv_nsec - tp_start.tv_nsec);
if (time_min==0 ||loop==1 || time_min > time_diff)
time_min=time_diff;
if (time_max==0 ||loop==1 || time_max < time_diff)
time_max=time_diff;
if (time_avg ==0 ||loop==1)
time_avg= time_diff;
else
time_avg=(time_diff+time_avg) /2.0;
/* //prints statics of uhd every 10 seconds
if ( loop % (10 * ((int)device->openair0_cfg[0].sample_rate /(int)nsamps )) ==0)
LOG_I(HW,"usrp_write: min(ns)=%d, max(ns)=%d, avg(ns)=%d\n", (int)time_min, (int)time_max,(int)time_avg);
*/
loop++;
return ret;
return ret;
}
/*! \brief Receive samples from hardware.
......@@ -226,45 +178,42 @@ static int trx_usrp_write(openair0_device *device, openair0_timestamp timestamp,
* \param antenna_id Index of antenna for which to receive samples
* \returns the number of sample read
*/
static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp, void **buff, int nsamps, int cc)
{
static long long int loop=0;
static long time_min=0, time_max=0, time_avg=0;
struct timespec tp_start, tp_end;
long time_diff;
clock_gettime(CLOCK_MONOTONIC_RAW, &tp_start);
usrp_state_t *s = (usrp_state_t*)device->priv;
int samples_received=0,i,j;
int nsamps2; // aligned to upper 32 or 16 byte boundary
static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp, void **buff, int nsamps, int cc) {
usrp_state_t *s = (usrp_state_t*)device->priv;
int samples_received=0,i,j;
int nsamps2; // aligned to upper 32 or 16 byte boundary
#if defined(__x86_64) || defined(__i386__)
#ifdef __AVX2__
nsamps2 = (nsamps+7)>>3;
__m256i buff_tmp[2][nsamps2];
nsamps2 = (nsamps+7)>>3;
__m256i buff_tmp[2][nsamps2];
#else
nsamps2 = (nsamps+3)>>2;
__m128i buff_tmp[2][nsamps2];
nsamps2 = (nsamps+3)>>2;
__m128i buff_tmp[2][nsamps2];
#endif
#elif defined(__arm__)
nsamps2 = (nsamps+3)>>2;
int16x8_t buff_tmp[2][nsamps2];
nsamps2 = (nsamps+3)>>2;
int16x8_t buff_tmp[2][nsamps2];
#endif
if (device->type == USRP_B200_DEV) {
if (cc>1) {
// receive multiple channels (e.g. RF A and RF B)
std::vector<void *> buff_ptrs;
for (int i=0;i<cc;i++) buff_ptrs.push_back(buff_tmp[i]);
samples_received = s->rx_stream->recv(buff_ptrs, nsamps, s->rx_md);
} else {
// receive a single channel (e.g. from connector RF A)
samples_received = s->rx_stream->recv(buff_tmp[0], nsamps, s->rx_md);
}
// bring RX data into 12 LSBs for softmodem RX
for (int i=0;i<cc;i++) {
for (int j=0; j<nsamps2; j++) {
if (device->type == USRP_B200_DEV) {
if (cc>1) {
// receive multiple channels (e.g. RF A and RF B)
std::vector<void *> buff_ptrs;
for (int i=0; i<cc; i++) buff_ptrs.push_back(buff_tmp[i]);
samples_received = s->rx_stream->recv(buff_ptrs, nsamps, s->rx_md);
} else {
// receive a single channel (e.g. from connector RF A)
samples_received=0;
while (samples_received != nsamps) {
samples_received += s->rx_stream->recv(buff_tmp[0]+samples_received,
nsamps-samples_received, s->rx_md);
if (s->rx_md.error_code!=uhd::rx_metadata_t::ERROR_CODE_NONE)
break;
}
}
// bring RX data into 12 LSBs for softmodem RX
for (int i=0; i<cc; i++) {
for (int j=0; j<nsamps2; j++) {
#if defined(__x86_64__) || defined(__i386__)
#ifdef __AVX2__
((__m256i *)buff[i])[j] = _mm256_srai_epi16(buff_tmp[i][j],4);
......@@ -288,67 +237,26 @@ static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp
samples_received = s->rx_stream->recv(buff[0], nsamps, s->rx_md);
}
}
if (samples_received < nsamps)
LOG_E(PHY,"[recv] received %d samples out of %d\n",samples_received,nsamps);
if (samples_received < nsamps) {
printf("[recv] received %d samples out of %d\n",samples_received,nsamps);
}
if ( s->rx_md.error_code != uhd::rx_metadata_t::ERROR_CODE_NONE)
LOG_E(PHY,s->rx_md.to_pp_string(true).c_str());
//handle the error code
switch(s->rx_md.error_code){
case uhd::rx_metadata_t::ERROR_CODE_NONE:
break;
case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
printf("[recv] USRP RX OVERFLOW!\n");
s->num_overflows++;
break;
case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
printf("[recv] USRP RX TIMEOUT!\n");
break;
default:
printf("[recv] Unexpected error on RX, Error code: 0x%x\n",s->rx_md.error_code);
break;
}
s->rx_count += nsamps;
s->rx_timestamp = s->rx_md.time_spec.to_ticks(s->sample_rate);
*ptimestamp = s->rx_timestamp;
clock_gettime(CLOCK_MONOTONIC_RAW, &tp_end);
time_diff = (tp_end.tv_sec - tp_start.tv_sec) *1E09 + (tp_end.tv_nsec - tp_start.tv_nsec);
if (time_min==0 ||loop==1 || time_min > time_diff)
time_min=time_diff;
if (time_max==0 ||loop==1 || time_max < time_diff)
time_max=time_diff;
if (time_avg ==0 ||loop==1)
time_avg= time_diff;
else
time_avg=(time_diff+time_avg) /2.0;
/*
//prints statics of uhd every 10 seconds
if ( loop % (10 * ((int)device->openair0_cfg[0].sample_rate /(int)nsamps )) ==0)
LOG_I(HW,"usrp_read: min(ns)=%d, max(ns)=%d, avg(ns)=%d\n", (int)time_min, (int)time_max,(int)time_avg);
loop++;*/
return samples_received;
s->rx_count += nsamps;
s->rx_timestamp = s->rx_md.time_spec.to_ticks(s->sample_rate);
*ptimestamp = s->rx_timestamp;
#ifdef DEBUG_USRP
check(50);
#endif
return samples_received;
}
/*! \brief Get current timestamp of USRP
* \param device the hardware to use
*/
openair0_timestamp get_usrp_time(openair0_device *device)
{
usrp_state_t *s = (usrp_state_t*)device->priv;
return s->usrp->get_time_now().to_ticks(s->sample_rate);
}
/*! \brief Compares two variables within precision
* \param a first variable
* \param b second variable
*/
static bool is_equal(double a, double b)
{
static bool is_equal(double a, double b) {
return std::fabs(a-b) < std::numeric_limits<double>::epsilon();
}
......@@ -360,59 +268,60 @@ static bool is_equal(double a, double b)
*/
int trx_usrp_set_freq(openair0_device* device, openair0_config_t *openair0_cfg, int dummy) {
usrp_state_t *s = (usrp_state_t*)device->priv;
usrp_state_t *s = (usrp_state_t*)device->priv;
printf("Setting USRP TX Freq %f, RX Freq %f\n",openair0_cfg[0].tx_freq[0],openair0_cfg[0].rx_freq[0]);
s->usrp->set_tx_freq(openair0_cfg[0].tx_freq[0]);
s->usrp->set_rx_freq(openair0_cfg[0].rx_freq[0]);
LOG_I(PHY,"Setting USRP TX Freq %f, RX Freq %f\n",openair0_cfg[0].tx_freq[0],openair0_cfg[0].rx_freq[0]);
s->usrp->set_tx_freq(openair0_cfg[0].tx_freq[0]);
s->usrp->set_rx_freq(openair0_cfg[0].rx_freq[0]);
return(0);
return(0);
}
/*! \brief Set RX frequencies
/*! \brief Set RX frequencies
* \param device the hardware to use
* \param openair0_cfg RF frontend parameters set by application
* \returns 0 in success
* \returns 0 in success
*/
int openair0_set_rx_frequencies(openair0_device* device, openair0_config_t *openair0_cfg) {
usrp_state_t *s = (usrp_state_t*)device->priv;
static int first_call=1;
static double rf_freq,diff;
usrp_state_t *s = (usrp_state_t*)device->priv;
static int first_call=1;
static double rf_freq,diff;
uhd::tune_request_t rx_tune_req(openair0_cfg[0].rx_freq[0]);
uhd::tune_request_t rx_tune_req(openair0_cfg[0].rx_freq[0]);
rx_tune_req.rf_freq_policy = uhd::tune_request_t::POLICY_MANUAL;
rx_tune_req.rf_freq = openair0_cfg[0].rx_freq[0];
rf_freq=openair0_cfg[0].rx_freq[0];
s->usrp->set_rx_freq(rx_tune_req);
rx_tune_req.rf_freq_policy = uhd::tune_request_t::POLICY_MANUAL;
rx_tune_req.rf_freq = openair0_cfg[0].rx_freq[0];
rf_freq=openair0_cfg[0].rx_freq[0];
s->usrp->set_rx_freq(rx_tune_req);
return(0);
return(0);
}
/*! \brief Set Gains (TX/RX)
* \param device the hardware to use
* \param openair0_cfg RF frontend parameters set by application
* \returns 0 in success
* \returns 0 in success
*/
int trx_usrp_set_gains(openair0_device* device,
openair0_config_t *openair0_cfg) {
usrp_state_t *s = (usrp_state_t*)device->priv;
s->usrp->set_tx_gain(openair0_cfg[0].tx_gain[0]);
::uhd::gain_range_t gain_range = s->usrp->get_rx_gain_range(0);
// limit to maximum gain
if (openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0] > gain_range.stop()) {
printf("RX Gain 0 too high, reduce by %f dB\n",
openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0] - gain_range.stop());
exit(-1);
}
s->usrp->set_rx_gain(openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0]);
printf("Setting USRP RX gain to %f (rx_gain %f,gain_range.stop() %f)\n", openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0],openair0_cfg[0].rx_gain[0],gain_range.stop());
int trx_usrp_set_gains(openair0_device* device,
openair0_config_t *openair0_cfg) {
usrp_state_t *s = (usrp_state_t*)device->priv;
s->usrp->set_tx_gain(openair0_cfg[0].tx_gain[0]);
::uhd::gain_range_t gain_range = s->usrp->get_rx_gain_range(0);
// limit to maximum gain
if (openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0] > gain_range.stop()) {
LOG_E(PHY,"RX Gain 0 too high, reduce by %f dB\n",
openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0] - gain_range.stop());
exit(-1);
}
s->usrp->set_rx_gain(openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0]);
LOG_I(PHY,"Setting USRP RX gain to %f (rx_gain %f,gain_range.stop() %f)\n",
openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0],
openair0_cfg[0].rx_gain[0],gain_range.stop());
return(0);
}
......@@ -426,376 +335,310 @@ int trx_usrp_stop(openair0_device* device) {
/*! \brief USRPB210 RX calibration table */
rx_gain_calib_table_t calib_table_b210[] = {
{3500000000.0,44.0},
{2660000000.0,49.0},
{2300000000.0,50.0},
{1880000000.0,53.0},
{816000000.0,58.0},
{-1,0}};
{3500000000.0,44.0},
{2660000000.0,49.0},
{2300000000.0,50.0},
{1880000000.0,53.0},
{816000000.0,58.0},
{-1,0}
};
/*! \brief USRPB210 RX calibration table */
rx_gain_calib_table_t calib_table_b210_38[] = {
{3500000000.0,44.0},
{2660000000.0,49.8},
{2300000000.0,51.0},
{1880000000.0,53.0},
{816000000.0,57.0},
{-1,0}};
{3500000000.0,44.0},
{2660000000.0,49.8},
{2300000000.0,51.0},
{1880000000.0,53.0},
{816000000.0,57.0},
{-1,0}
};
/*! \brief USRPx310 RX calibration table */
rx_gain_calib_table_t calib_table_x310[] = {
{3500000000.0,77.0},
{2660000000.0,81.0},
{2300000000.0,81.0},
{1880000000.0,82.0},
{816000000.0,85.0},
{-1,0}};
/*! \brief Set RX gain offset
{3500000000.0,77.0},
{2660000000.0,81.0},
{2300000000.0,81.0},
{1880000000.0,82.0},
{816000000.0,85.0},
{-1,0}
};
/*! \brief Set RX gain offset
* \param openair0_cfg RF frontend parameters set by application
* \param chain_index RF chain to apply settings to
* \returns 0 in success
* \returns 0 in success
*/
void set_rx_gain_offset(openair0_config_t *openair0_cfg, int chain_index,int bw_gain_adjust) {
int i=0;
// loop through calibration table to find best adjustment factor for RX frequency
double min_diff = 6e9,diff,gain_adj=0.0;
if (bw_gain_adjust==1) {
switch ((int)openair0_cfg[0].sample_rate) {
case 30720000:
break;
case 23040000:
gain_adj=1.25;
break;
case 15360000:
gain_adj=3.0;
break;
case 7680000:
gain_adj=6.0;
break;
case 3840000:
gain_adj=9.0;
break;
case 1920000:
gain_adj=12.0;
break;
default:
printf("unknown sampling rate %d\n",(int)openair0_cfg[0].sample_rate);
exit(-1);
break;
int i=0;
// loop through calibration table to find best adjustment factor for RX frequency
double min_diff = 6e9,diff,gain_adj=0.0;
if (bw_gain_adjust==1) {
switch ((int)openair0_cfg[0].sample_rate) {
case 30720000:
break;
case 23040000:
gain_adj=1.25;
break;
case 15360000:
gain_adj=3.0;
break;
case 7680000:
gain_adj=6.0;
break;
case 3840000:
gain_adj=9.0;
break;
case 1920000:
gain_adj=12.0;
break;
default:
LOG_E(PHY,"unknown sampling rate %d\n",(int)openair0_cfg[0].sample_rate);
exit(-1);
break;
}
}
}
while (openair0_cfg->rx_gain_calib_table[i].freq>0) {
diff = fabs(openair0_cfg->rx_freq[chain_index] - openair0_cfg->rx_gain_calib_table[i].freq);
printf("cal %d: freq %f, offset %f, diff %f\n",
i,
openair0_cfg->rx_gain_calib_table[i].freq,
while (openair0_cfg->rx_gain_calib_table[i].freq>0) {
diff = fabs(openair0_cfg->rx_freq[chain_index] - openair0_cfg->rx_gain_calib_table[i].freq);
LOG_I(PHY,"cal %d: freq %f, offset %f, diff %f\n",
i,
openair0_cfg->rx_gain_calib_table[i].freq,
openair0_cfg->rx_gain_calib_table[i].offset,diff);
if (min_diff > diff) {
min_diff = diff;
openair0_cfg->rx_gain_offset[chain_index] = openair0_cfg->rx_gain_calib_table[i].offset+gain_adj;
}
i++;
}
}
}
/*! \brief print the USRP statistics
/*! \brief print the USRP statistics
* \param device the hardware to use
* \returns 0 on success
*/
int trx_usrp_get_stats(openair0_device* device) {
return(0);
return(0);
}
/*! \brief Reset the USRP statistics
* \param device the hardware to use
* \returns 0 on success
*/