| 1 | | == GNURadio on SB3 == |
| | 1 | = Working with USRP - Universal Software Radio Peripheral = |
| | 2 | |
| | 3 | == Description == |
| | 4 | In this tutorial we'll use the 2 USRPs on Sandbox 3 to transmit and receive a single frequency over the air. The UHD (UniversalSoftwareRadioPeripheral Hardware Driver) is used to communicate with the USRPs. This driver is used standalone to configure and enable the USRP for communication. |
| | 5 | |
| | 6 | == Hardware / Software Resources utilized == |
| | 7 | 1. Sandbox 3 - consists of two nodes (node1-1 & node1-2). Each node has a USRP2 connect via Ethernet. |
| | 8 | 2. ''ubuntu-11-10-gnuradio.ndz'': disk image loaded onto nodes. This image has all the precompiled - software required to configure the USRPs and analyze recorded data. |
| | 9 | 3. omf-5.2 / omf-5.3: used to image to nodes |
| | 10 | 4. octave: GNU version of MATLAB |
| | 11 | |
| | 12 | == Set up == |
| | 13 | * To get started first make a reservation on the [https://www.orbit-lab.org/schedule/ Orbit Scheduler] for using Sandbox 3 |
| | 14 | |
| | 15 | * After logging into sandbox 3 console, make sure both nodes are turned off |
| | 16 | {{{ |
| | 17 | nilanjan@console.sb3:~$ omf-5.2 tell offh all |
| | 18 | }}} |
| | 19 | |
| | 20 | * Verify state of node before continuing. Make sure all nodes are in the POWEROFF state. |
| | 21 | {{{ |
| | 22 | nilanjan@console.sb3:~$ omf-5.2 stat |
| | 23 | }}} |
| | 24 | |
| | 25 | * Image both nodes |
| | 26 | {{{ |
| | 27 | nilanjan@console.sb3:~$ omf-5.3 load -i ubuntu-11-10-gnuradio.ndz -t node1-1.sb3.orbit-lab.org,node1-2.sb3.orbit-lab.org |
| | 28 | }}} |
| | 29 | |
| | 30 | * After nodes are imaged, verify that nodes are in POWEROFF state. Otherwise issue the following to turn them off for a reboot |
| | 31 | {{{ |
| | 32 | nilanjan@console.sb3:~$ nilanjan@console.sb3:~$ omf-5.2 tell offh all |
| | 33 | }}} |
| | 34 | |
| | 35 | * Turn nodes back on and verify they are in POWERON state before proceeding |
| | 36 | {{{ |
| | 37 | nilanjan@console.sb3:~$ nilanjan@console.sb3:~$ omf-5.2 tell on all |
| | 38 | }}} |
| | 39 | |
| | 40 | == Usage == |
| | 41 | * Once nodes are imaged, ssh into each node. Use the USRP2 on node1-1 as the transmitter and USRP2 on node1-2 as receiver.[[BR]] |
| | 42 | ssh into node1-1 |
| | 43 | {{{ |
| | 44 | nilanjan@console.sb3:~$ ssh root@node1-1 |
| | 45 | root@node1-1:~# cd uhd/host/build/examples/ |
| | 46 | }}} |
| | 47 | |
| | 48 | ssh into node1-2 |
| | 49 | {{{ |
| | 50 | nilanjan@console.sb3:~$ ssh root@node1-2 |
| | 51 | root@node1-1:~# cd uhd/host/build/examples/ |
| | 52 | }}} |
| | 53 | |
| | 54 | * The directory content like the following in both nodes |
| | 55 | {{{ |
| | 56 | root@node1-1:~/uhd/host/build/examples# ls |
| | 57 | benchmark_rate latency_test rx_samples_to_file test_pps_input tx_waveforms |
| | 58 | CMakeFiles Makefile rx_samples_to_udp tx_bursts |
| | 59 | cmake_install.cmake network_relay rx_timed_samples tx_samples_from_file |
| | 60 | CTestTestfile.cmake rx_multi_samples test_messages tx_timed_samples |
| | 61 | }}} |
