| 76 | | ==== Details on configuring the canceller PCB ==== |
| 77 | | |
| | 76 | === Details on the available experiments === |
| | 77 | In general, the three example experiments provide a means for the experimenter to benchmark the performance of the FD radios, and provide a basis for further experimentation. In this section we provide further detail for each experiment and what they allow the experimenter to observe. |
| | 78 | |
| | 79 | ==== node_level_sic_fd_gui ==== |
| | 80 | This experiment's primary use is to visualize the node-level performance of a single FD radio. In this experiment, several performance metrics are visualized: |
| | 81 | * The received self-interference (SI) after RF SI cancellation (SIC) and after digital SIC. |
| | 82 | * The received power spectra after RF SIC and after digital SIC. |
| | 83 | * The complex-valued digital SIC filter taps. |
| | 84 | * The estimated SI channel. |
| | 85 | |
| | 86 | '''Selecting a radio''' |
| | 87 | As there are two radios, this experiment can be run on either one by changing the value of the {{{usrp_sink_addr}}} and {{{usrp_source_addr}}}. The available values are {{{192.168.30.3}}} and {{{192.168.30.4}}}, and {{{usrp_sink_addr}}} and {{{usrp_source_addr}}} must be set to the same value. |
| | 88 | |
| | 89 | Please note that currently, the radio with IP address {{{192.168.30.4}}} is temporarily set up with a 10dB attenuator on the Rx in order to equalize link performance between the two radios. Therefore, the received SI will be noticeably smaller for this radio. |
| | 90 | |
| | 91 | '''Tunable variables''' |
| | 92 | Several other variables can be changed: |
| | 93 | |
| | 94 | * {{{freq}}} - the carrier frequency used. The Gen-2 hardware can support roughly 900-1000MHz. |
| | 95 | * {{{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. |
| | 96 | * {{{tx_gain}}} - this sets the Tx gain in dB. At a setting of 15, the transmit power will be -10dBm. A setting of greater than 22 can degrade performance. |
| | 97 | |
| | 98 | '''Details on configuring the canceller PCB''' |
