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srsRAN_4G
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- Cleaned up style in the PRACH class:

Browse Source 
* Removed magic numbers.
* Reduced indentation of statements with early exists.
* Removed elses after a return statement.
* Trimmed unnecessary include files.
* Default initialized members in the class.
master
faluco 4 years ago committed by faluco
parent b892da0294
commit 5acc1c9a73
2 changed files with 132 additions and 150 deletions
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56
srsue/hdr/phy/prach.h
Unescape Escape View File

@ -22,41 +22,29 @@
#ifndef SRSUE_PRACH_H
#define SRSUE_PRACH_H
#include <bitset>
#include <string.h>
#include "srslte/common/log.h"
#include "srslte/interfaces/ue_interfaces.h"
#include "srslte/radio/radio.h"
#include "srslte/srslte.h"
#include <bitset>
namespace srsue {
class prach
{
public:
prach()
{
bzero(&prach_obj, sizeof(srslte_prach_t));
bzero(&cell, sizeof(srslte_cell_t));
bzero(&cfo_h, sizeof(srslte_cfo_t));
prach() = default;
~prach() { stop(); }
transmitted_tti = 0;
target_power_dbm = 0;
mem_initiated = false;
cell_initiated = false;
signal_buffer = NULL;
}
~prach();
void init(uint32_t max_prb, srslte::log* log_h);
void stop();
bool set_cell(srslte_cell_t cell, srslte_prach_cfg_t prach_cfg);
bool prepare_to_send(uint32_t preamble_idx, int allowed_subframe = -1, float target_power_dbm = -1);
bool is_ready_to_send(uint32_t current_tti);
bool is_pending();
bool is_pending() const;
cf_t* generate(float cfo, uint32_t* nof_sf, float* target_power = NULL);
phy_interface_mac_lte::prach_info_t get_info();
phy_interface_mac_lte::prach_info_t get_info() const;
private:
bool generate_buffer(uint32_t f_idx);
@ -72,23 +60,25 @@ private:
}
private:
const static int MAX_LEN_SF = 3;
static constexpr unsigned MAX_LEN_SF = 3;
static constexpr unsigned max_fs = 12;
static constexpr unsigned max_preambles = 64;
srslte::log* log_h;
int preamble_idx;
int allowed_subframe;
bool mem_initiated;
bool cell_initiated;
uint32_t len;
cf_t* buffer[12][64];
std::bitset<12 * 64> buffer_bitmask;
srslte_prach_t prach_obj;
int transmitted_tti;
srslte_cell_t cell;
cf_t* signal_buffer;
srslte_cfo_t cfo_h;
float target_power_dbm;
srslte_prach_cfg_t cfg = {};
srslte::log* log_h = nullptr;
srslte_prach_t prach_obj = {};
srslte_cell_t cell = {};
srslte_cfo_t cfo_h = {};
srslte_prach_cfg_t cfg = {};
std::array<std::array<cf_t*, max_preambles>, max_fs> buffer = {};
cf_t* signal_buffer = nullptr;
int preamble_idx = 0;
uint32_t len = 0;
int allowed_subframe = 0;
int transmitted_tti = 0;
float target_power_dbm = 0;
bool mem_initiated = false;
bool cell_initiated = false;
std::bitset<max_fs * max_preambles> buffer_bitmask;
};
} // namespace srsue

226
srsue/src/phy/prach.cc
Unescape Escape View File

@ -19,15 +19,10 @@
*
*/
#include <pthread.h>
#include <string.h>
#include <strings.h>
#include "srsue/hdr/phy/prach.h"
#include "srslte/common/log.h"
#include "srslte/interfaces/ue_interfaces.h"
#include "srslte/srslte.h"
#include "srsue/hdr/phy/phy.h"
#include "srsue/hdr/phy/prach.h"
#define Error(fmt, ...) \
if (SRSLTE_DEBUG_ENABLED) \
@ -42,100 +37,100 @@
if (SRSLTE_DEBUG_ENABLED) \
log_h->debug(fmt, ##__VA_ARGS__)
namespace srsue {
prach::~prach()
{
stop();
}
using namespace srsue;
void prach::init(uint32_t max_prb, srslte::log* log_h_)
{
log_h = log_h_;
for (int i = 0; i < 64; i++) {
for (int f = 0; f < 12; f++) {
buffer[f][i] = srslte_vec_cf_malloc(SRSLTE_PRACH_MAX_LEN);
if (!buffer[f][i]) {
for (auto& i : buffer) {
for (auto& j : i) {
j = srslte_vec_cf_malloc(SRSLTE_PRACH_MAX_LEN);
if (!j) {
perror("malloc");
return;
}
}
}
if (srslte_cfo_init(&cfo_h, SRSLTE_PRACH_MAX_LEN)) {
ERROR("PRACH: Error initiating CFO\n");
return;
}
srslte_cfo_set_tol(&cfo_h, 0);
signal_buffer = srslte_vec_cf_malloc(MAX_LEN_SF * 30720U);
if (!signal_buffer) {
perror("malloc");
return;
}
if (srslte_prach_init(&prach_obj, srslte_symbol_sz(max_prb))) {
Error("Initiating PRACH library\n");
return;
}
mem_initiated = true;
}
void prach::stop()
{
if (mem_initiated) {
for (int i = 0; i < 64; i++) {
for (int f = 0; f < 12; f++) {
if (buffer[f][i]) {
free(buffer[f][i]);
}
}
}
if (signal_buffer) {
free(signal_buffer);
if (!mem_initiated) {
return;
}
for (auto& i : buffer) {
for (auto& j : i) {
free(j);
}
srslte_cfo_free(&cfo_h);
srslte_prach_free(&prach_obj);
mem_initiated = false;
}
free(signal_buffer);
srslte_cfo_free(&cfo_h);
srslte_prach_free(&prach_obj);
mem_initiated = false;
}
bool prach::set_cell(srslte_cell_t cell_, srslte_prach_cfg_t prach_cfg)
{
if (mem_initiated) {
// TODO: Check if other PRACH parameters changed
if (cell.id != cell_.id || !cell_initiated) {
cell = cell_;
cfg = prach_cfg;
preamble_idx = -1;
if (6 + prach_cfg.freq_offset > cell.nof_prb) {
log_h->console(
"Error no space for PRACH: frequency offset=%d, N_rb_ul=%d\n", prach_cfg.freq_offset, cell.nof_prb);
log_h->error(
"Error no space for PRACH: frequency offset=%d, N_rb_ul=%d\n", prach_cfg.freq_offset, cell.nof_prb);
return false;
}
if (!mem_initiated) {
ERROR("PRACH: Error must call init() first\n");
return false;
}
Info("PRACH: configIdx=%d, rootSequence=%d, zeroCorrelationConfig=%d, freqOffset=%d\n",
prach_cfg.config_idx,
prach_cfg.root_seq_idx,
prach_cfg.zero_corr_zone,
prach_cfg.freq_offset);
// TODO: Check if other PRACH parameters changed
if (cell.id == cell_.id && cell_initiated) {
return true;
}
if (srslte_prach_set_cfg(&prach_obj, &prach_cfg, cell.nof_prb)) {
Error("Initiating PRACH library\n");
return false;
}
cell = cell_;
cfg = prach_cfg;
preamble_idx = -1;
buffer_bitmask.reset();
len = prach_obj.N_seq + prach_obj.N_cp;
transmitted_tti = -1;
cell_initiated = true;
}
return true;
} else {
ERROR("PRACH: Error must call init() first\n");
if (6 + prach_cfg.freq_offset > cell.nof_prb) {
log_h->console("Error no space for PRACH: frequency offset=%d, N_rb_ul=%d\n", prach_cfg.freq_offset, cell.nof_prb);
log_h->error("Error no space for PRACH: frequency offset=%d, N_rb_ul=%d\n", prach_cfg.freq_offset, cell.nof_prb);
return false;
}
Info("PRACH: configIdx=%d, rootSequence=%d, zeroCorrelationConfig=%d, freqOffset=%d\n",
prach_cfg.config_idx,
prach_cfg.root_seq_idx,
prach_cfg.zero_corr_zone,
prach_cfg.freq_offset);
if (srslte_prach_set_cfg(&prach_obj, &prach_cfg, cell.nof_prb)) {
Error("Initiating PRACH library\n");
return false;
}
buffer_bitmask.reset();
len = prach_obj.N_seq + prach_obj.N_cp;
transmitted_tti = -1;
cell_initiated = true;
return true;
}
bool prach::generate_buffer(uint32_t f_idx)
@ -161,26 +156,26 @@ bool prach::generate_buffer(uint32_t f_idx)
bool prach::prepare_to_send(uint32_t preamble_idx_, int allowed_subframe_, float target_power_dbm_)
{
if (cell_initiated && preamble_idx_ < 64) {
if (cell_initiated && preamble_idx_ < max_preambles) {
preamble_idx = preamble_idx_;
target_power_dbm = target_power_dbm_;
allowed_subframe = allowed_subframe_;
transmitted_tti = -1;
Debug("PRACH: prepare to send preamble %d\n", preamble_idx);
return true;
}
if (!cell_initiated) {
Error("PRACH: Cell not configured\n");
} else {
if (!cell_initiated) {
Error("PRACH: Cell not configured\n");
} else {
Error("PRACH: Invalid preamble %d\n", preamble_idx_);
}
return false;
Error("PRACH: Invalid preamble %d\n", preamble_idx_);
}
return false;
}
bool prach::is_pending()
bool prach::is_pending() const
{
return cell_initiated && preamble_idx >= 0 && preamble_idx < 64;
return cell_initiated && preamble_idx >= 0 && unsigned(preamble_idx) < max_preambles;
}
bool prach::is_ready_to_send(uint32_t current_tti_)
@ -197,7 +192,7 @@ bool prach::is_ready_to_send(uint32_t current_tti_)
return false;
}
phy_interface_mac_lte::prach_info_t prach::get_info()
phy_interface_mac_lte::prach_info_t prach::get_info() const
{
phy_interface_mac_lte::prach_info_t info = {};
@ -217,61 +212,58 @@ phy_interface_mac_lte::prach_info_t prach::get_info()
cf_t* prach::generate(float cfo, uint32_t* nof_sf, float* target_power)
{
if (cell_initiated && preamble_idx >= 0 && nof_sf && preamble_idx < 64 && srslte_cell_isvalid(&cell) &&
len < MAX_LEN_SF * 30720 && len > 0) {
uint32_t f_idx = 0;
if (cell.frame_type == SRSLTE_TDD) {
f_idx = prach_obj.current_prach_idx;
// For format4, choose odd or even position
if (prach_obj.config_idx >= 48) {
f_idx += 6;
}
if (f_idx >= 12) {
Error("PRACH Buffer: Invalid f_idx=%d\n", f_idx);
f_idx = 0;
}
}
if (!cell_initiated || preamble_idx < 0 || !nof_sf || unsigned(preamble_idx) >= max_preambles ||
!srslte_cell_isvalid(&cell) || len >= MAX_LEN_SF * 30720 || len == 0) {
Error("PRACH: Invalid parameters: cell_initiated=%d, preamble_idx=%d, cell.nof_prb=%d, len=%d\n",
cell_initiated,
preamble_idx,
cell.nof_prb,
len);
return nullptr;
}
if (!generate_buffer(f_idx)) {
return NULL;
uint32_t f_idx = 0;
if (cell.frame_type == SRSLTE_TDD) {
f_idx = prach_obj.current_prach_idx;
// For format4, choose odd or even position
if (prach_obj.config_idx >= 48) {
f_idx += 6;
}
if (!is_buffer_generated(f_idx, preamble_idx)) {
Error("PRACH Buffer not generated: f_idx=%d preamble_idx=%d\n", f_idx, preamble_idx);
return NULL;
if (f_idx >= max_fs) {
Error("PRACH Buffer: Invalid f_idx=%d\n", f_idx);
f_idx = 0;
}
}
// Correct CFO before transmission
srslte_cfo_correct(&cfo_h, buffer[f_idx][preamble_idx], signal_buffer, cfo / srslte_symbol_sz(cell.nof_prb));
if (!generate_buffer(f_idx)) {
return nullptr;
}
// pad guard symbols with zeros
uint32_t nsf = (len - 1) / SRSLTE_SF_LEN_PRB(cell.nof_prb) + 1;
srslte_vec_cf_zero(&signal_buffer[len], (nsf * SRSLTE_SF_LEN_PRB(cell.nof_prb) - len));
if (!is_buffer_generated(f_idx, preamble_idx)) {
Error("PRACH Buffer not generated: f_idx=%d preamble_idx=%d\n", f_idx, preamble_idx);
return nullptr;
}
*nof_sf = nsf;
// Correct CFO before transmission
srslte_cfo_correct(&cfo_h, buffer[f_idx][preamble_idx], signal_buffer, cfo / srslte_symbol_sz(cell.nof_prb));
if (target_power) {
*target_power = target_power_dbm;
}
// pad guard symbols with zeros
uint32_t nsf = (len - 1) / SRSLTE_SF_LEN_PRB(cell.nof_prb) + 1;
srslte_vec_cf_zero(&signal_buffer[len], (nsf * SRSLTE_SF_LEN_PRB(cell.nof_prb) - len));
Info("PRACH: Transmitted preamble=%d, tti_tx=%d, CFO=%.2f KHz, nof_sf=%d, target_power=%.1f dBm\n",
preamble_idx,
transmitted_tti,
cfo * 15,
nsf,
target_power_dbm);
preamble_idx = -1;
*nof_sf = nsf;
return signal_buffer;
} else {
Error("PRACH: Invalid parameters: cell_initiated=%d, preamble_idx=%d, cell.nof_prb=%d, len=%d\n",
cell_initiated,
preamble_idx,
cell.nof_prb,
len);
return NULL;
if (target_power) {
*target_power = target_power_dbm;
}
}
} // namespace srsue
Info("PRACH: Transmitted preamble=%d, tti_tx=%d, CFO=%.2f KHz, nof_sf=%d, target_power=%.1f dBm\n",
preamble_idx,
transmitted_tti,
cfo * 15,
nsf,
target_power_dbm);
preamble_idx = -1;
return signal_buffer;
}

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