TY - GEN
T1 - Full-duplex spectrum sensing in cognitive radios using optical self-interference cancellation
AU - Chang, Matthew P.
AU - Prucnal, Paul Richard
AU - Deng, Yanhua
PY - 2016/3/21
Y1 - 2016/3/21
N2 - We propose and experimentally demonstrate an optical self-interference cancellation system to realize full-duplex spectrum sensing in cognitive radios. The optical system is an analog radio-frequency front-end module, which cancels in-band self-interference, enabling a radio to simultaneously transmit and receive signals. The system achieves 83 dB of narrowband interference cancellation, and 60 dB of cancellation of a 50 MHz frequency-modulated signal. The center frequency of the optical canceler is freely tunable across the radio frequency spectrum, limited only by the bandwidth of the photodetector and the electro-optic modulators to 10 GHz. The system is modulation-format independent and requires only one piece of hardware to operate across a wide radio-frequency bandwidth. By reducing self-interference to acceptably low powers, a cognitive radio can continuously sense its radio-frequency environment to detect the presence of a licensed user or scan for spectrum white spaces even while transmitting simultaneously.
AB - We propose and experimentally demonstrate an optical self-interference cancellation system to realize full-duplex spectrum sensing in cognitive radios. The optical system is an analog radio-frequency front-end module, which cancels in-band self-interference, enabling a radio to simultaneously transmit and receive signals. The system achieves 83 dB of narrowband interference cancellation, and 60 dB of cancellation of a 50 MHz frequency-modulated signal. The center frequency of the optical canceler is freely tunable across the radio frequency spectrum, limited only by the bandwidth of the photodetector and the electro-optic modulators to 10 GHz. The system is modulation-format independent and requires only one piece of hardware to operate across a wide radio-frequency bandwidth. By reducing self-interference to acceptably low powers, a cognitive radio can continuously sense its radio-frequency environment to detect the presence of a licensed user or scan for spectrum white spaces even while transmitting simultaneously.
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U2 - 10.1109/ICSensT.2015.7438419
DO - 10.1109/ICSensT.2015.7438419
M3 - Conference contribution
T3 - Proceedings of the International Conference on Sensing Technology, ICST
SP - 341
EP - 344
BT - 2015 9th International Conference on Sensing Technology, ICST 2015
PB - IEEE Computer Society
T2 - 9th International Conference on Sensing Technology, ICST 2015
Y2 - 8 December 2015 through 11 December 2015
ER -