merge branch origin/channel-simulation-in-rfsimulator

cmake_targets/CMakeLists.txt

@@ -519,6 +519,9 @@ add_list1_option(NB_ANTENNAS_RX "2" "Number of antennas in reception" "1" "2" "4
 add_list1_option(NB_ANTENNAS_TX "4" "Number of antennas in transmission" "1" "2" "4")
 
 add_list2_option(RF_BOARD "EXMIMO" "RF head type" "None" "EXMIMO" "OAI_USRP" "OAI_BLADERF" "CPRIGW" "OAI_LMSSDR" "OAI_SIMU")
+if (NOT ${RF_BOARD} STREQUAL "None")
+   add_definitions(-DMANAGED_RF=1)
+endif()
 
 
 add_list2_option(TRANSP_PRO "None" "Transport protocol type" "None" "ETHERNET")
@@ -627,8 +630,6 @@ set(HWLIB_TCP_BRIDGE_OAI_SOURCE
 add_library(tcp_bridge_oai MODULE ${HWLIB_TCP_BRIDGE_OAI_SOURCE} )
 set_target_properties(tcp_bridge_oai PROPERTIES COMPILE_FLAGS "-fvisibility=hidden")
 
-add_library(rfsimulator MODULE ${OPENAIR_TARGETS}/ARCH/rfsimulator/simulator.c)
-
 ##########################################################
 
 include_directories ("${OPENAIR_TARGETS}/ARCH/COMMON")
@@ -2010,6 +2011,11 @@ add_library(uescope MODULE ${XFORMS_SOURCE} ${XFORMS_SOURCE_SOFTMODEM} ${XFORMS_
 target_link_libraries(enbscope ${XFORMS_LIBRARIES})
 target_link_libraries(uescope ${XFORMS_LIBRARIES})
 
+add_library(rfsimulator MODULE 
+	${OPENAIR_TARGETS}/ARCH/rfsimulator/simulator.c
+	)
+target_link_libraries(rfsimulator SIMU ${ATLAS_LIBRARIES})
+
 set(CMAKE_MODULE_PATH "${OPENAIR_DIR}/cmake_targets/tools/MODULES" "${CMAKE_MODULE_PATH}")
 
 #include T directory even if the T is off because T macros are in the code
@@ -2053,6 +2059,25 @@ add_definitions(-DASN1_MINIMUM_VERSION=924)
 #################################
 # add executables for operation
 #################################
+add_library(minimal_lib
+  ${OPENAIR_DIR}/common/utils/backtrace.c
+  ${OPENAIR_DIR}/common/utils/LOG/log.c
+  ${OPENAIR_DIR}/common/config/config_userapi.c
+  ${OPENAIR_DIR}/common/config/config_load_configmodule.c
+  ${OPENAIR_DIR}/common/config/config_cmdline.c
+  ${OPENAIR_DIR}/common/utils/minimal_stub.c
+  ${T_SOURCE}
+  )
+target_link_libraries(minimal_lib pthread dl ${T_LIB})
+
+add_executable(replay_node
+  ${OPENAIR_TARGETS}/ARCH/rfsimulator/stored_node.c
+  )
+target_link_libraries (replay_node minimal_lib)
+
+add_executable(measurement_display
+  ${OPENAIR_DIR}/common/utils/threadPool/measurement_display.c)
+target_link_libraries (measurement_display minimal_lib)
 
 # lte-softmodem is both eNB and UE implementation
 ###################################################

common/config/config_userapi.c

@@ -450,7 +450,7 @@ int config_setdefault_double(paramdef_t *cfgoptions, char *prefix) {
   config_check_valptr(cfgoptions, (char **)&(cfgoptions->dblptr),sizeof(double));
 
   if( ((cfgoptions->paramflags & PARAMFLAG_MANDATORY) == 0)) {
-    *(cfgoptions->u64ptr)=cfgoptions->defdblval;
+    *(cfgoptions->dblptr)=cfgoptions->defdblval;
     status=1;
     printf_params("[CONFIG] %s set to default value %lf\n",cfgoptions->optname , *(cfgoptions->dblptr));
   }

common/utils/minimal_stub.c

+int T_stdout;
+
+void exit_function(const char *file, const char *function, const int line, const char *s) {
+}

common/utils/simple_executable.h

+#ifndef __SIMPLE_EXE_H__
+#define __SIMPLE_EXE_H__
+#ifndef __USE_GNU
+#define __USE_GNU
+#endif
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <stdio.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <sys/time.h>
+#include <stdint.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#include <common/utils/assertions.h>
+#include <common/utils/LOG/log.h>
+#include "common_lib.h"
+
+#ifdef T
+  #undef T
+  #define T(...)
+#endif
+
+#endif

targets/ARCH/COMMON/common_lib.c

@@ -42,35 +42,35 @@
 int set_device(openair0_device *device) {
   switch (device->type) {
     case EXMIMO_DEV:
-      printf("[%s] has loaded EXPRESS MIMO device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_I(HW,"[%s] has loaded EXPRESS MIMO device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       break;
 
     case USRP_B200_DEV:
-      printf("[%s] has loaded USRP B200 device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_I(HW,"[%s] has loaded USRP B200 device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       break;
 
     case USRP_X300_DEV:
-      printf("[%s] has loaded USRP X300 device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_I(HW,"[%s] has loaded USRP X300 device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       break;
 
     case BLADERF_DEV:
-      printf("[%s] has loaded BLADERF device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_I(HW,"[%s] has loaded BLADERF device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       break;
 
     case LMSSDR_DEV:
-      printf("[%s] has loaded LMSSDR device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_I(HW,"[%s] has loaded LMSSDR device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       break;
 
     case IRIS_DEV:
-      printf("[%s] has loaded Iris device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_I(HW,"[%s] has loaded Iris device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       break;
 
     case NONE_DEV:
-      printf("[%s] has not loaded a HW device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_I(HW,"[%s] has not loaded a HW device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       break;
 
     default:
-      printf("[%s] invalid HW device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_E(HW,"[%s] invalid HW device.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       return -1;
   }
 
@@ -80,17 +80,17 @@ int set_device(openair0_device *device) {
 int set_transport(openair0_device *device) {
   switch (device->transp_type) {
     case ETHERNET_TP:
-      printf("[%s] has loaded ETHERNET trasport protocol.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_I(HW,"[%s] has loaded ETHERNET trasport protocol.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       return 0;
       break;
 
     case NONE_TP:
-      printf("[%s] has not loaded a transport protocol.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_I(HW,"[%s] has not loaded a transport protocol.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       return 0;
       break;
 
     default:
-      printf("[%s] invalid transport protocol.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
+      LOG_E(HW,"[%s] invalid transport protocol.\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"));
       return -1;
       break;
   }
@@ -119,7 +119,7 @@ int load_lib(openair0_device *device, openair0_config_t *openair0_cfg, eth_param
   ret=load_module_shlib(libname,shlib_fdesc,1,NULL);
 
   if (ret < 0) {
-    fprintf(stderr,"Library %s couldn't be loaded\n",libname);
+    LOG_E(HW,"Library %s couldn't be loaded\n",libname);
   } else {
     ret=((devfunc_t)shlib_fdesc[0].fptr)(device,openair0_cfg,cfg);
   }
@@ -135,7 +135,7 @@ int openair0_device_load(openair0_device *device, openair0_config_t *openair0_cf
 
   if ( rc >= 0) {
     if ( set_device(device) < 0) {
-      fprintf(stderr, "%s %d:Unsupported radio head\n",__FILE__, __LINE__);
+      LOG_E(HW, "%s %d:Unsupported radio head\n",__FILE__, __LINE__);
       return -1;
     }
   }
@@ -149,7 +149,7 @@ int openair0_transport_load(openair0_device *device, openair0_config_t *openair0
 
   if ( rc >= 0) {
     if ( set_transport(device) < 0) {
-      fprintf(stderr, "%s %d:Unsupported transport protocol\n",__FILE__, __LINE__);
+      LOG_E(HW, "%s %d:Unsupported transport protocol\n",__FILE__, __LINE__);
       return -1;
     }
   }

targets/ARCH/COMMON/common_lib.h

@@ -34,6 +34,7 @@
 #define COMMON_LIB_H
 #include <stdint.h>
 #include <sys/types.h>
+#include <openair1/PHY/TOOLS/tools_defs.h>
 
 /* name of shared library implementing the radio front end */
 #define OAI_RF_LIBNAME        "oai_device"
@@ -83,9 +84,6 @@ typedef enum {
  */
 /*!\brief RF device types
  */
-#ifdef OCP_FRAMEWORK
-#include <enums.h>
-#else
 typedef enum {
   MIN_RF_DEV_TYPE = 0,
   /*!\brief device is ExpressMIMO */
@@ -109,7 +107,6 @@ typedef enum {
   MAX_RF_DEV_TYPE
 
 } dev_type_t;
-#endif
 
 /*!\brief transport protocol types
  */
@@ -218,14 +215,6 @@ typedef struct {
   int iq_rxrescale;
   //! Configuration file for LMS7002M
   char *configFilename;
-  //! remote IP/MAC addr for Ethernet interface
-  char *remote_addr;
-  //! remote port number for Ethernet interface
-  unsigned int remote_port;
-  //! local IP/MAC addr for Ethernet interface (eNB/BBU, UE)
-  char *my_addr;
-  //! local port number for Ethernet interface (eNB/BBU, UE)
-  unsigned int my_port;
 #if defined(USRP_REC_PLAY)
   unsigned short sf_mode;           // 1=record, 2=replay
   char           sf_filename[1024]; // subframes file path
@@ -235,13 +224,6 @@ typedef struct {
   unsigned int   sf_write_delay;    // write delay in replay mode
   unsigned int   eth_mtu;           // ethernet MTU
 #endif
-
-  //! number of samples per tti
-  unsigned int  samples_per_tti;
-  //! the sample rate for receive.
-  double rx_sample_rate;
-  //! the sample rate for transmit.
-  double tx_sample_rate;
 } openair0_config_t;
 
 /*! \brief RF mapping */
@@ -415,7 +397,7 @@ typedef int(*oai_transport_initfunc_t)(openair0_device *device, openair0_config_
 
 #define OPTION_LZ4  0x00000001          // LZ4 compression (option_value is set to compressed size)
 
-#define sample_t uint32_t // 2*16 bits complex number
+#define sample_t struct complex16 // 2*16 bits complex number
 
 typedef struct {
   uint64_t magic;          // Magic value (see defines above)
@@ -452,7 +434,7 @@ openair0_timestamp get_usrp_time(openair0_device *device);
  * \returns 0 in success
  */
 int openair0_set_rx_frequencies(openair0_device *device, openair0_config_t *openair0_cfg);
-#define gettid() syscall(__NR_gettid)
+
 /*@}*/
 
 #ifdef __cplusplus

targets/ARCH/rfsimulator/README.md

-## General
-
+#General
 This is a RF simulator that allows to test OAI without a RF board.
 It replaces a actual RF board driver.
 
 As much as possible, it works like a RF board, but not in realtime: it can run faster than realtime if there is enough CPU or slower (it is CPU bound instead of real time RF sampling bound)
 
-## build
+#build
 
- No specific build is required, use the [oai softmodem build procedure](../../../doc/BUILD.md)
+## From build_oai
+You can build it the same way, and together with actual RF driver
 
+Example:
+```bash
+./build_oai --ue-nas-use-tun --UE --eNB -w SIMU
+```
+It is also possible to build actual RF and use choose on each run:
+```bash
+./build_oai --ue-nas-use-tun --UE --eNB -w USRP --rfsimulator
+```
+Will build both the eNB (lte-softmodem) and the UE (lte-uesoftmodem)
+We recommend to use the option --ue-nas-use-tun that is much simpler to use than the OAI kernel driver.
+
+## Add the rfsimulator after initial build
 After any regular build, you can compile the driver
 ```bash
 cd <the_compilation_dir_from_bouild_oai_script>/build
@@ -18,35 +30,21 @@ Then, you can use it freely
 
 # Usage
 Setting the env variable RFSIMULATOR enables the RF board simulator
-It should the set to "enb" in the eNB
+It should the set to "server" in the eNB or gNB
 
 ## 4G case
 For the UE, it should be set to the IP address of the eNB
 example: 
-
 ```bash
-sudo RFSIMULATOR=192.168.2.200 ./lte-uesoftmodem -C 2685000000 -r 50 --rfsim
+sudo RFSIMULATOR=192.168.2.200 ./lte-uesoftmodem -C 2685000000 -r 50 
 ```
-For the eNodeB, use a valid configuration file setup for USRP board tests and start the softmodem as usual, but adding the `--rfsim` option.
-
-
-
-```bash
-sudo RFSIMULATOR=enb ./lte-softmodem -O <config file> --rfsim
-```
-
-
-
 Except this, the UE and the eNB can be used as it the RF is real
 
 If you reach 'RA not active' on UE, be careful to generate a valid SIM
 ```bash
 $OPENAIR_DIR/targets/bin/conf2uedata -c $OPENAIR_DIR/openair3/NAS/TOOLS/ue_eurecom_test_sfr.conf -o .
 ```
-This simulator can also be used with the `--noS1` option, in this case you must run the eNodeB and the UE on different PCs. 
-
 ## 5G case
-
 After regular build, add the simulation driver
 (don't use ./build_oai -w SIMU until we merge 4G and 5G branches)
 ```bash
@@ -55,7 +53,7 @@ make rfsimulator
 ```
 ### Launch gNB in one window
 ```bash
-sudo RFSIMULATOR=enb ./nr-softmodem -O ../../../targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpn300.conf --parallel-config PARALLEL_SINGLE_THREAD
+sudo RFSIMULATOR=server ./nr-softmodem -O ../../../targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpn300.conf --parallel-config PARALLEL_SINGLE_THREAD
 ```
 ### Launch UE in another window
 ```bash
@@ -64,8 +62,40 @@ sudo RFSIMULATOR=127.0.0.1 ./nr-uesoftmodem --numerology 1 -r 106 -C 3510000000
 Of course, set the gNB machine IP address if the UE and the gNB are not on the same machine
 In UE, you can add "-d" to get the softscope
 
-## Caveacts
+### store and replay
 
-Still issues in power control: txgain, rxgain are not used
+You can store emitted I/Q samples:
 
+If you set the environment variable: saveIQfile to a file name
+The simulator will write all IQ samples into this file
+
+Then, you can replay with the executable "replay_node"
+
+First compile it, as the other binaries
+```
+make replay_node
+```
+You can use this binary as I/Q data source to feed whatever UE or NB with recorded I/Q samples.
+
+The file format is successive blocks of a header followed by the I/Q array.
+If you have existing stored I/Q, you can adpat the tool "replay_node" to convert your format to the rfsimulator format.
+
+The format intend to be compatible with the OAI store/replay feature on USRP
+
+### Channel simulation
+The RF channel simulator is called.
+In current version all channel paramters are hard coded in the call to:
+```
+new_channel_desc_scm(bridge->tx_num_channels,bridge->rx_num_channels,
+                                          AWGN,
+                                          bridge->sample_rate,
+                                          bridge->tx_bw,
+                                          0.0, // forgetting_factor
+                                          0, // maybe used for TA
+                                          0); // path_loss in dB
+```
+Only the input noise can be changed on command line with -s parameter.
+With path loss = 0 set "-s 5" to see a little noise
 
+#Caveacts
+Still issues in power control: txgain, rxgain are not used
\ No newline at end of file

targets/ARCH/rfsimulator/stored_node.c

+/*
+  Author: Laurent THOMAS, Open Cells
+  copyleft: OpenAirInterface Software Alliance and it's licence
+*/
+
+#include <common/utils/simple_executable.h>
+
+
+void fullwrite(int fd, void *_buf, int count) {
+  char *buf = _buf;
+  int l;
+
+  while (count) {
+    l = write(fd, buf, count);
+
+    if (l <= 0) {
+      if (errno==EINTR)
+        continue;
+
+      if(errno==EAGAIN) {
+        continue;
+      } else {
+        AssertFatal(false,"Lost socket\n");
+      }
+    } else {
+      count -= l;
+      buf += l;
+    }
+  }
+}
+
+int server_start(short port) {
+  int listen_sock;
+  AssertFatal((listen_sock = socket(AF_INET, SOCK_STREAM, 0)) >= 0, "");
+  int enable = 1;
+  AssertFatal(setsockopt(listen_sock, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(int)) == 0, "");
+  struct sockaddr_in addr = {
+sin_family:
+    AF_INET,
+sin_port:
+    htons(port),
+sin_addr:
+    { s_addr: INADDR_ANY }
+  };
+  bind(listen_sock, (struct sockaddr *)&addr, sizeof(addr));
+  AssertFatal(listen(listen_sock, 5) == 0, "");
+  return accept(listen_sock,NULL,NULL);
+}
+
+int client_start(char *IP, short port) {
+  int sock;
+  AssertFatal((sock = socket(AF_INET, SOCK_STREAM, 0)) >= 0, "");
+  struct sockaddr_in addr = {
+sin_family:
+    AF_INET,
+sin_port:
+    htons(port),
+sin_addr:
+    { s_addr: INADDR_ANY }
+  };
+  addr.sin_addr.s_addr = inet_addr(IP);
+  bool connected=false;
+
+  while(!connected) {
+    LOG_I(HW,"rfsimulator: trying to connect to %s:%d\n", IP, port);
+
+    if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) == 0) {
+      LOG_I(HW,"rfsimulator: connection established\n");
+      connected=true;
+    }
+
+    perror("simulated node");
+    sleep(1);
+  }
+
+  return sock;
+}
+
+enum  blocking_t {
+  notBlocking,
+  blocking
+};
+
+void setblocking(int sock, enum blocking_t active) {
+  int opts;
+  AssertFatal( (opts = fcntl(sock, F_GETFL)) >= 0,"");
+
+  if (active==blocking)
+    opts = opts & ~O_NONBLOCK;
+  else
+    opts = opts | O_NONBLOCK;
+
+  AssertFatal(fcntl(sock, F_SETFL, opts) >= 0, "");
+}
+
+int main(int argc, char *argv[]) {
+  if(argc != 4) {
+    printf("Need parameters: source file, server or destination IP, TCP port\n");
+    exit(1);
+  }
+
+  int fd;
+  AssertFatal((fd=open(argv[1],O_RDONLY)) != -1, "file: %s", argv[1]);
+  off_t fileSize=lseek(fd, 0, SEEK_END);
+  int serviceSock;
+
+  if (strcmp(argv[2],"server")==0) {
+    serviceSock=server_start(atoi(argv[3]));
+  } else {
+    client_start(argv[2],atoi(argv[3]));
+  }
+
+  samplesBlockHeader_t header;
+  int bufSize=100000;
+  void *buff=malloc(bufSize);
+
+  while (1) {
+    //Rewind the file to loop on the samples
+    if ( lseek(fd, 0, SEEK_CUR) >= fileSize )
+      lseek(fd, 0, SEEK_SET);
+
+    // Read one block and send it
+    setblocking(serviceSock, blocking);
+    AssertFatal(read(fd,&header,sizeof(header)), "");
+    fullwrite(serviceSock, &header, sizeof(header));
+    int dataSize=sizeof(sample_t)*header.size*header.nbAnt;
+
+    if (dataSize>bufSize)
+      buff=realloc(buff,dataSize);
+
+    AssertFatal(read(fd,buff,dataSize) == dataSize, "");
+    fullwrite(serviceSock, buff, dataSize);
+    // Purge incoming samples
+    setblocking(serviceSock, notBlocking);
+
+    while(recv(serviceSock,buff, bufSize, MSG_DONTWAIT) > 0) {
+    }
+  }
+
+  return 0;
+}
+

targets/RT/USER/lte-softmodem-common.c

@@ -37,6 +37,7 @@
 static softmodem_params_t softmodem_params;
 char *parallel_config=NULL;
 char *worker_config=NULL;
+double snr_dB=25;
 
 uint64_t get_softmodem_optmask(void) {
   return softmodem_params.optmask;

targets/RT/USER/lte-softmodem.h

@@ -150,7 +150,6 @@
     {"usrp-clksrc",                CONFIG_HLP_USRP_CLK_SRC,0,               strptr:(char **)&usrp_clksrc,       defstrval:"internal", TYPE_STRING,   0},   \
     {"mmapped-dma",                CONFIG_HLP_DMAMAP,      PARAMFLAG_BOOL,  uptr:&mmapped_dma,                  defintval:0,          TYPE_INT,      0},   \
     {"clock",                      CONFIG_HLP_CLK,         0,               uptr:&clock_source,                 defintval:0,          TYPE_UINT,     0},   \
-    {"s" ,                         CONFIG_HLP_SNR,         0,               iptr:&snr_dB,                       defintval:25,         TYPE_INT,      0},   \
     {"T" ,                         CONFIG_HLP_TDD,         PARAMFLAG_BOOL,  iptr:&tddflag,                      defintval:0,          TYPE_INT,      0},   \
     {"A",                          CONFIG_HLP_TADV,        0,               iptr:&(timingadv),                  defintval:0,          TYPE_INT,      0}    \
   }
@@ -197,6 +196,7 @@
     {"d" ,                      CONFIG_HLP_SOFTS,       PARAMFLAG_BOOL,         uptr:(uint32_t *)&do_forms,         defintval:0,                    TYPE_INT8,      0},                     \
     {"q" ,                      CONFIG_HLP_STMON,       PARAMFLAG_BOOL,         iptr:&opp_enabled,                  defintval:0,                    TYPE_INT,       0},                     \
     {"S" ,                      CONFIG_HLP_MSLOTS,      PARAMFLAG_BOOL,         u8ptr:&exit_missed_slots,           defintval:1,                    TYPE_UINT8,     0},                     \
+    {"s" ,                         CONFIG_HLP_SNR,         0,               dblptr:&snr_dB,                       defdblval:25,         TYPE_DOUBLE,      0},   \
     {"numerology" ,             CONFIG_HLP_NUMEROLOGY,  PARAMFLAG_BOOL,         iptr:&NUMEROLOGY,                   defintval:0,                    TYPE_INT,       0},                     \
     {"parallel-config",         CONFIG_HLP_PARALLEL_CMD,0,                      strptr:(char **)&parallel_config,   defstrval:NULL,                 TYPE_STRING,    0},                     \
     {"worker-config",           CONFIG_HLP_WORKER_CMD,  0,                      strptr:(char **)&worker_config,     defstrval:NULL,                 TYPE_STRING,    0},                     \
@@ -277,6 +277,7 @@ uint64_t get_pdcp_optmask(void);
 extern pthread_cond_t sync_cond;
 extern pthread_mutex_t sync_mutex;
 extern int sync_var;
+extern double snr_dB;
 
 
 extern uint32_t          downlink_frequency[MAX_NUM_CCs][4];

targets/RT/USER/lte-uesoftmodem.c

@@ -131,7 +131,6 @@ int32_t                  uplink_frequency_offset[MAX_NUM_CCs][4];
 int UE_scan = 1;
 int UE_scan_carrier = 0;
 
-int snr_dB=25;
 
 runmode_t mode = normal_txrx;
 
@@ -810,7 +809,7 @@ int main( int argc, char **argv ) {
   //p_exmimo_config->framing.tdd_config = TXRXSWITCH_TESTRX;
 
   if (IS_SOFTMODEM_SIML1 )  {
-    init_ocm((double)snr_dB,0);
+    init_ocm(snr_dB,0);
     PHY_vars_UE_g[0][0]->no_timing_correction = 1;
   }