  In order to support experimentation with full-duplex (FD) wireless, we
recently integrated an open-access FD transceiver in the ORBIT testbed. In this
report, we present the design and implementation of the FD transceiver and
interfaces, and provide examples and guidelines for experimentation. In
particular, an ORBIT node with a National Instruments (NI)/Ettus Research
Universal Software Radio Peripheral (USRP) N210 software-defined radio (SDR)
was equipped with the Columbia FlexICoN Gen-1 customized RF self-interference
(SI) canceller box. The RF canceller box includes an RF SI canceller that is
implemented using discrete components on a printed circuit board (PCB) and
achieves 40dB RF SI cancellation across 5MHz bandwidth. We provide an FD
transceiver baseline program and present two example FD experiments where 90dB
and 85dB overall SI cancellation is achieved for a simple waveform and PSK
modulated signals across both the RF and digital domains. We also discuss
potential FD wireless experiments that can be conducted based on the
implemented open-access FD transceiver and baseline program.
