wiki:Tutorials/Wireless/FR3/Sine

Version 1 (modified by seskar, 8 months ago) ( diff )

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Generating and Observing Basic FR3 Sine Wave

Description

This experiment uses two USRP 2974s for baseband processing and two Pi Radio SDRs for up/down conversion to FR3 bands. Transmit USRP sends the basic sinewave at 1.5 GHz to the Pi Radio SDR which upconverts it to 10 GHz and sends it over the antenna to the receiving antenna on second Pi-Radio which down coverts it to 1.5 GHz and send it to USRP for further processing (DFT) and display

Prerequisites

Resources required

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 COSMOS sandbox 1
  3. Login into sandbox 1 console (console.sb1.cosmos-lab.org) with two SSH sessions.
  4. Make sure all the resources in the domain are turned off: 
    omf tell -a offh -t system:topo:allres
  5. The image is [. Load xxx.ndz on sdr1-piradio and sdr2-piradio. 
    omf load -i xxx.ndz -t sdr1-piradio,sdr2-piradio
  6. Turn all the required resources on and check the status 
    omf tell -a on -t sdr1-piradio,sdr2-piradio,rfdev-sdr1-piradio,rfdev-sdr2-piradio

    omf stat -t system:topo:allres
  7. ssh to the USRP 2974s nodes and start the chrome remote desktop session (follow the instructions at)

Experiment Execution

tx_waveforms --args "resource=RIO0" --subdev A:0 --freq 1.5e9 --ampl 0.7 --gain 30 --wave-type SINE --ant TX/RX --rate 10e6 --wave-freq 5e6

rx_ascii_art_dft --args "resource=RIO0" --subdev A:0 --freq 1.5e9 --ant RX2 --rate 20e6

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