Changes between Initial Version and Version 1 of Tutorials/Wireless/mimo Radar

Timestamp:

Nov 5, 2025, 5:01:42 PM (2 weeks ago)

Author:

akleniatis

Comment:

—

Tutorials/Wireless/mimo Radar

@@ +1 @@
+
+[[Include(WikiToC)]]
+
+=== mmWave OFDM based ISAC Tutorial
+
+==== Description
+This tutorial demonstrates how to perform an mmWave OFDM based ISAC (Integrated Sensing and Communications) experiment using COSMOS radar SDR nodes and a mobile PAAM receiver.
+
+[[PageOutline(3-6,,inline,unnumbered)]]
+
+==== Prerequisites
+* COSMOS account and reservation established
+* Access to the radar SDR nodes and PAAM mobile node
+* Chrome Remote Desktop for graphical access
+
+==== Related COSMOS Documentation
+* [[wiki:SDRandWireless SDR and Wireless Overview]]
+* [[wiki:Hardware/SubSystems RF Subsystems]]
+* [[wiki:UserGuide/RemoteAccess/ChromeRemoteDesktopSetupPage Chrome Remote Desktop Setup Page]]
+
+==== Resource Requirements
+* Server: `srv1-lg1`
+* Mobile PAAM: `mob4-1`
+* SDRs: `sdr1-radar`, `sdr2-radar`
+* PAAMs: `rfdev-sdr1-radar`, `rfdev-sdr2-radar`
+* OMF Image: `ubuntu2004-uhd4.3-gr3.8-paam-radar-new.ndz`
+
+==== Setup
+
+Load the required images onto the server and mobile PAAM:
+
+{{{#!shell
+omf load -i ubuntu2004-uhd4.3-gr3.8-paam-radar-new.ndz -t srv1-lg1
+omf load -i ubuntu2004-uhd4.3-gr3.8-paam-radar-new.ndz -t mob4-1
+}}}
+
+Power on the experiment hardware:
+
+{{{#!shell
+omf tell -a on -t sdr1-radar,rfdev-sdr1-radar,sdr2-radar,rfdev-sdr2-radar,mob4-1,srv1-lg1
+}}}
+
+Connect to the server:
+
+{{{#!shell-session
+ssh root@srv1-lg1
+}}}
+
+Run the PAAM setup script:
+
+{{{#!shell
+cd IBM_PAAM_Software_vFINAL/examples/
+python3 paam_radar_setup.py
+}}}
+
+Connect via Chrome Remote Desktop and choose **GNOME on Xorg**.
+
+===== Screenshot Placeholder
+[[Image(mmwave_setup_placeholder.png, 600px)]]
+
+==== Execution
+
+===== Radar Side (srv1-lg1)
+
+Terminal 1 network configuration and radar application:
+
+{{{#!shell
+sudo ip link set dev eno1 mtu 9000
+sudo sysctl -w net.core.wmem_max=25000000
+O-JRC/examples/build-mimo-ofdm-packet-generator-Desktop-Debug/mimo-ofdm-packet-generator
+}}}
+
+Configure signal parameters:
+
+* Carrier Frequency: 28 GHz
+* Sample Rate: 100 MHz
+* Packet size: 50 bytes
+* TX Antennas: 2
+
+Press Start once configured.
+
+===== Screenshot Placeholder
+[[Image(signal_parameters_placeholder.png, 600px)]]
+
+Terminal 2:
+
+{{{#!shell
+gnuradio-companion
+}}}
+
+==== Calibration
+
+Open the calibration flowgraph:
+
+* `O-JRC/examples/usrp/V0_JRC_calibration.grc`
+
+Verify calibration parameters:
+
+* Variables
+  * `usrp_freq: 3e9`
+  * `samp_rate: 100e6`
+  * `rf_freq: 28e9`
+* usrp_mimo_trx
+  * Number of TX: 2
+  * Number of RX: 2
+  * Number of MBoards: 2
+  * USRP Arguments: `"addr0=10.38.24.1, addr1=10.38.24.2, master_clock_rate=200e6"`
+  * Clock Sources: `"internal,external"`
+  * Time Sources: `"internal,external"`
+
+Execute the flowgraph and adjust the following parameters until waveforms are aligned:
+
+* RX2 Gain
+* RX2 Phase
+
+Record these calibration values.
+
+Terminate flowgraph.
+
+==== Radar Transmission
+
+Open TRX flowgraph:
+
+* `O-JRC/examples/usrp/V1_JRC_TRX.grc`
+
+Update defaults for:
+
+* `amp_rx2` = calibrated gain
+* `phase_rx2` = calibrated phase
+
+Run radar transmission.
+
+==== Mobile PAAM Receiver (mob4-1)
+
+Terminal setup:
+
+{{{#!shell
+sudo ip link set dev eno1 mtu 9000
+sudo sysctl -w net.core.wmem_max=25000000
+curl "http://am1.orbit-lab.org:5054/array_mgmt/configure?dev_name=rfev-mob4-1.sb1.cosmos-lab.org&ics=all&num_elements=16&txrx=rx&pol=h&theta=0&phi=0"
+}}}
+
+Launch GRC:
+
+{{{#!shell
+gnuradio-companion
+}}}
+
+Open RX Flowgraph:
+
+* `O-JRC/examples/usrp/V1_JRC_RX.grc`
+
+Check parameters:
+
+* Variables
+  * `usrp_freq: 3e9`
+  * `samp_rate: 100e6`
+  * `rf_frequency: 28e9`
+* UHD Source
+  * Device Address: `"serial=31557B9,master_clock_rate=200e6"`
+  * Device Arguments: `"resource:RIO0"`
+  * Mb0: Subdev Spec: `"A:0"`
+
+Execute to receive the OFDM data.