Changes between Version 2 and Version 3 of Tutorials/k0SDR/Tutorial24

Timestamp:

Oct 9, 2017, 6:58:37 PM (7 years ago)

Author:

prasanthi

Comment:

—

Tutorials/k0SDR/Tutorial24

@@ -1 +1 @@
 
-== RFNoC Spectrum Sensing ==
+ RFNoC Spectrum Sensing
+
+=== Description ===
+This tutorial shows how to use the RFNoC Spectrum Sensing block(CE) to plot receive power spectrum from multiple USRP X310s on ORBIT grid.
+
+=== Set Up ===
+Make a reservation on the [https://www.orbit-lab.org/schedule/ Orbit Scheduler] for using the grid.
+==== Prepare Receive Node ====
+* Load prasanthi-rfnoc-specsense-9-14.ndz on an ORBIT node. 
+{{{
+omf load -i prasanthi-rfnoc-specsense-9-14.ndz -t node1-19
+}}}
+* Once imaging is done, turn the node on
+{{{
+omf tell -a on -t node1-19
+}}}
+* Wait for the node to turn on and log in
+{{{
+ssh root@node1-19
+}}}
+==== Prepare Receive USRPs ====
+* Pick USRP X310s from the MIMO racks 23-1...8, 23-11...18 and load spectrum sensing FPGA image on them.
+{{{
+uhd_image_loader --args="addr0=10.10.23.11,addr1=10.10.23.12,addr2=10.10.23.13,add4=10.10.23.14" --fpga-path="/root/bit/x310_spec_sense_2ddc_1duc_7_14.bit"
+}}}
+* Power cycle USRPs so that the new FPGA image is active
+{{{
+omf tell -a offh -t node23-11
+omf tell -a on -t node23-11
+}}}
+==== Prepare Transmit Node ====
+Any source can be used to transmit a test waveform. In this tutorial, a spectrum spreader RFNoC block is being used to generate wideband PN signal.
+* Load prasanthi-channel-sounder.ndz on an ORBIT node.
+{{{
+omf load -i prasanthi-channel-sounder.ndz -t node1-20
+}}}
+* Once imaging is done, turn the node on
+{{{
+omf tell -a on -t node1-20
+}}}
+* Wait for the node to turn on and log in
+{{{
+ssh root@node1-20
+}}}
+==== Prepare Transmit USRP ====
+* Pick a USRP X310 for transmitting, and load the spectrum spreader FPGA image
+{{{
+uhd_image_loader --args="addr=10.10.23.17" --fpga-path="/root/bit/x310_spreader_4_28.bit"
+}}}
+* Power cycle the USRP so that the new FPGA image is active
+{{{
+omf tell -a offh -t node23-17
+omf tell -a on -t node23-17
+}}}
+==== Set up SSH tunnel from your local port 5100 to grid.orbit-lab.org:5100 ====
+{{{
+ssh -L 5100:grid.orbit-lab.org:5100 username@grid.orbit-lab.org
+}}}
+==== Set up a web proxy for the receive node ====
+Verify that Webproxy is running (this is required for remote web based streaming)
+{{{
+nilanjan@.grid:~$ run-websock 5100 10.10.1.19:5100 --daemon
+WebSocket server settings:
+  - Listen on :5100
+  - Flash security policy server
+  - No SSL/TLS support (no cert file)
+  - Backgrounding (daemon)
+}}}
+