Changes between Version 20 and Version 21 of Tutorials/Wireless/Full Duplex


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Timestamp:
Aug 23, 2020, 10:57:20 PM (5 years ago)
Author:
mpk2138
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  • Tutorials/Wireless/Full Duplex

    v20 v21  
    5959}}}
    6060
    61 If X-forwarding is setup correctly for your {{{ssh}}} session, the GNU Radio GUI program should open. If X-forwarding is not setup correctly, an error will display saying that the GUI window cannot be opened.
     61If X-forwarding is setup correctly for your {{{ssh}}} session, the GNU Radio graphical user interface (GUI) program should open. If X-forwarding is not setup correctly, an error will display saying that the GUI window cannot be opened.
    6262
    6363Open an example experiment from the {{{~/FD_Examples}}} directory. The following experiments are available:
    … …  
    7070Finally, clicking the grey-green play button will run the experiment!
    7171
    72  ||||||Figure 1: Gen-2 FDE Canceller Boxes in COSMOS Sandbox 2 ||
    73  || [[Image(GNURadioFDExperiment.2.png,320px)]] || [[Image(ofdm_link_fd_gui.png,320px)]] ||
     72 ||||||Figure 3: An example FD experiment in the COSMOS testbed ||
     73 || [[Image(GNURadioFDExperiment.2.png,480px)]] || [[Image(ofdm_link_fd_gui.png,480px)]] ||
    7474 || (a) The GNU Radio flowgraph || (b) The experiment GUI ||
    7575
    76 ==== Details on Experiments ====
     76==== Details on configuring the canceller PCB ====
     77
     78Using the experiment {{{node_level_sic_fd_gui}}}, the experimenter can configure the RF canceller PCB using the experiment GUI. There are 12 sliders:
     79 * {{{cap0, cap1, cap2}}} - these control the antenna tuner.
     80 * {{{att0, att1}}} - The attenuator values for FDE tap 0 and tap 1. Higher values lead to greater attenuation.
     81 * {{{dac0, dac1}}} - The phase shifter values for FDE tap 0 and tap 1.
     82 * {{{cf0, cf1}}} - The center frequency for FDE tap 0 and tap 1. Higher values lead to lower center frequency.
     83 * {{{qf0, qf1}}} - The quality factor for FDE tap 0 and tap 1. Higher values lead to lower quality factor.
     84 * {{{canc_path}}} - Determines whether the wideband FDE or narrowband Gen-1 canceller path is used. 0 = FDE, 1 = Gen-1.
     85 * {{{att2}}} - The attenuator values for the Gen-1 path. Higher values lead to greater attenuation.
     86 * {{{dac2}}} - The phase shifter values for the Gen-1 path.
     87
     88The experiment GUI will show a visualization of the received power spectrum and self-interference (SI) channel. Using this, the experimenter can generate any desired RF SIC profile.
     89
     90The GUI also provides a slider for the Tx/Rx delay. This setting is important for digital SIC performance, and the optimal value depends on the bandwidth used. For 10 MHz bandwidth, a delay of 40 should lead to the best digital SIC performance.
    7791
    7892== Full-Duplex Wireless in ORBIT ==