Changes between Version 26 and Version 27 of Tutorials/Wireless/Full Duplex

Timestamp:

Aug 28, 2020, 5:10:23 PM (4 years ago)

Author:

mpk2138

Comment:

—

Tutorials/Wireless/Full Duplex

@@ -25 +25 @@
 
 ==== Updates ====
-* [08/23/2020] - General updates
-* [02/03/2020] - Updated UHD and GNU Radio versions
-* [11/13/2019] - Updated pictures of Gen2 FDE nodes
-* [10/20/2019] - Connection to the FDE PC via COSMOS sb2
-* [10/07/2019] - Baseline overview of initial COSMOS sandbox status and accessibility
+* ![08/28/2020] - Details for each available experiment
+* ![08/23/2020] - General updates
+* ![02/03/2020] - Updated UHD and GNU Radio versions
+* ![11/13/2019] - Updated pictures of Gen2 FDE nodes
+* ![10/20/2019] - Connection to the FDE PC via COSMOS sb2
+* ![10/07/2019] - Baseline overview of initial COSMOS sandbox status and accessibility
 
 === Hardware / Software Resources Utilized ===
@@ -118 +119 @@
  || Figure 4: The node-level SIC experiment GUI ||
  || [[Image(node_level_sic_gui.png,480px)]] || 
+
+==== ofdm_link_fd_gui ====
+This experiment makes use of both FD radios to create a FD OFDM link. The radios are synchronized over a MIMO cable, guaranteeing operation in FD mode, where each radio transmits a packet at the same time and successfully decodes the other radio's packet. The following metrics are visualized:
+ * The packet data values.
+ * The packet sequence numbers.
+ * The received signal spectra at each radio after digital SIC.
+ * The digital SIC filter taps at each radio.
+
+In order for the FD link to operate successfully, each FD radio must be configured to provide sufficient SIC. This can be done with the {{{node_level_sic_fd_gui}}} experiment.
+
+'''Tunable variables'''
+
+ * {{{freq}}} - the carrier frequency used. The Gen-2 hardware can support roughly 900-1000MHz.
+ * {{{samp_rate}}} - the bandwidth used. Ideal choices are 10MHz and 12.5MHz. 20MHz is supported but due to limitations in the USRP receiver chain, 20MHz bandwidth received signals have a bandpass filtered character.
+
+The Tx gain is set to allow for successful operation as long as the two radios are achieving adequate SIC. It may be changed if desired through the UHD USRP Sink block on the GNU radio flowgraph.
+
+Below is the GUI for this experiment, showing the packet data values and sequence numbers.
+
+ || Figure 5: The OFDM link experiment GUI ||
+ || [[Image(ofdm_link_fd_gui.png,480px)]] || 
+
+==== prr_fd_gui ====
+This experiment takes the OFDM link and uses it to compute two metrics: the packet reception ratio (PRR) and signal-to-noise ratio (SNR). These metrics provide a basic link-level benchmark for the FD nodes. In this experiment, the following metrics are visualized:
+ * The received signal after RF SIC and after digital SIC.
+ * The measured SNR for each packet.
+ * The packet reception ratio averaged over the entire experiment run.
+ * The constellation diagram of the received signal after RF SIC and after digital SIC.
+
+For ease of use, we only display the visualization for a single radio.
+
+As before, in order for the FD link to operate successfully, each FD radio must be configured to provide sufficient SIC. This can be done with the {{{node_level_sic_fd_gui}}} experiment.
+
+'''Tunable variables'''
+ * {{{tx_gain}}} - The Tx gain is the key tunable variable as it determines the received packet SNR and therefore the PRR. This can be modified in real time using the GUI, and set prior to the experiment via the QT GUI Range block on the flowgraph.
+ * {{{freq}}} - the carrier frequency used. The Gen-2 hardware can support roughly 900-1000MHz.
+ * {{{samp_rate}}} - the bandwidth used. Ideal choices are 10MHz and 12.5MHz. 20MHz is supported but due to limitations in the USRP receiver chain, 20MHz bandwidth received signals have a bandpass filtered character.
+
+Below is the GUI for this experiment.
+
+ || Figure 6: The link PRR experiment GUI ||
+ || [[Image(prr_fd_gui.png,480px)]] || 
 
 === Acknowledgements ===