mmWave Channel Sounding on SandBox1 (IN PROGRESS)

Description

Prerequisites

In order to access the test bed, create a reservation and have it approved by the reservation service. Access to the resources is granted after the reservation is confirmed. Please follow the process shown on the COSMOS work flow page to get started.

Resources required

4 servers srv1-lg1 to srv4-lg1, 2 USRP X310s rfdev3-1, rfdev3-2 and both the Sivers platforms rfdev3-5, rfdev3-6 on COSMOS SB1.

Tutorial Setup

Follow the steps below to gain access to the sandbox 1 console and set up nodes with appropriate images.

1. If you don't have one already, sign up for a ​COSMOS account
2. Create a resource reservation on sandbox 1
3. Login into sandbox 1 console (console.sb1.cosmos-lab.org) with two SSH sessions.
4. Make sure all the nodes and devices used in the experiment are turned off:

   omf tell -a offh -t srv1-lg1,srv2-lg1,srv3-lg1,srv4-lg1,rfdev3-1,rfdev3-2,rfdev3-5,rfdev3-6  
   

5. The image rfnoc_wigig.ndz has aforementioned RFNoC 802.11ad preamble processing blocks installed. Load rfnoc_wigig.ndz on srv1,srv2. The image sivers_sb1_cosmos.ndz has UHD and Sivers control software installed. Load sivers_sb1_cosmos.ndz on srv3,srv4. Load the images on the computing nodes

   omf load -i rfnoc_wigig.ndz -t srv1-lg1,srv2-lg1
   

   omf load -i sivers_sb1_cosmos.ndz -t srv3-lg1,srv4-lg1
   

6. Turn all the required resources on and check the status

   omf tell -a on -t srv1-lg1,srv2-lg1,srv3-lg1,srv4-lg1,rfdev3-1,rfdev3-2,rfdev3-5,rfdev3-6
   

   omf stat -t system:topo:allres
   

1. ssh to the nodes, use option -Y for using GUI.

Experiment Execution

Find and prepare USRPs

• The IP addresses for Ethernet Port 1(10G) on the X310s sdr2-md2 and sdr2-md3 were hard-coded to 10.115.2.2 and 10.115.2.3 respectively. To access them from srv1-lg1 or srv2-lg2, configure the network interface eno2 as follows

  root@srv2-lg1:~# ifconfig eno2 10.115.1.1 netmask 255.255.0.0 mtu 9000 up
  root@srv2-lg1:~# ifconfig eno2
  eno2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
          inet 10.115.1.1  netmask 255.255.0.0  broadcast 10.115.255.255
          inet6 fe80::9a03:9bff:fe61:b0b1  prefixlen 64  scopeid 0x20<link>
          ether 98:03:9b:61:b0:b1  txqueuelen 1000  (Ethernet)
          RX packets 4661357820  bytes 37005247545892 (37.0 TB)
          RX errors 0  dropped 692293  overruns 0  frame 0
          TX packets 59454137  bytes 3576874343 (3.5 GB)
          TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
  

• Run uhd_find_devices to check if the X310s can be reached

  root@srv2-lg1:~# uhd_find_devices --args="addr=10.115.2.3"
  [INFO] [UHD] linux; GNU C++ version 7.4.0; Boost_106501; UHD_3.14.1.1-release
  --------------------------------------------------
  -- UHD Device 0
  --------------------------------------------------
  Device Address:
      serial: 31B6FFA
      addr: 10.115.2.3
      fpga: HG
      name: sdr2-md3
      product: X310
      type: x300
  

• Check which RFNoC blocks the are loaded on the X310s, by running uhd_usrp_probe

  root@srv1-lg1:~# uhd_usrp_probe --args="addr=10.115.2.2"
  

• Following is the list of RFNoC blocks required for the experiment

  |   |   |       RFNoC blocks on this device:
  |   |   |
  |   |   |   * DmaFIFO_0
  |   |   |   * Radio_0
  |   |   |   * Radio_1
  |   |   |   * PacketDetector_0
  |   |   |   * CFOC_0
  |   |   |   * DDC_0
  |   |   |   * DUC_0
  |   |   |   * FIR_0
  |   |   |   * SymbolTiming_0
  |   |   |   * BoundaryDetector_0
  |   |   |   * CIR_0
  |   |   |   * FIFO_0
  |   |   |   * FIFO_1
  
  

• If the required RFNoC blocks are not found, load X310 with MISO_IMAGE_x300.bit

  root@srv1-lg1:~# uhd_image_loader --args="addr=10.115.2.2,type=x300" --fpga-path="ORCA_MISO_PROJECT/FPGA_IMAGES/MISO_IMAGE_x300.bit"
  

• Power cycle X310 to use the new image, and run uhd_usrp_probe to check RFNoC blocks.

  root@console:~# omf tell -a offh -t rfdev3-1
  

  root@console:~# omf tell -a on -t rfdev3-1
  

Prepare Sivers 60GHz front-ends

• To demonstrate the experiment here, we use Sivers front-end SN0243 as transmitter and SN0240 as receiver

*

SN0243 as transmitter	SN0240 as receiver
root@srv3-lg1:~/ederenv# ./start_mb1.sh —gui SN0243	root@srv4-lg1:~/ederenv# ./start_mb1.sh —gui SN0240
Click "TX enable" and "LO leakage Cal"	Click "RX enable"

Run the experiment

• Open transmit application TX_TEST.grc on transmit node(srv1-lg1). This application transmits 802.11ad frames over rfdev3-1(10.115.2.2), at 200MSPS, by reading samples from a pre-generated file.

  root@srv1-lg1:~# gnuradio-companion TX_TEST.grc
  

• Open receive application RX_OTA_TEST.grc on receive node(srv2-lg1). This application receives and processes samples over rfdev3-2(10.115.2.3) as seen in the grc model below. Channel impulse response computed for every frame is written into a file on the host node.

  root@srv2-lg1:~# gnuradio-companion RX_OTA_TEST.grc
  

• Run the applications.
• Plot the CIR using CIR_re….m script
• Shown below are the CIR plots obtained for TX beam angles set to 0 and 15.