TY - GEN
T1 - Analysis of self-interference cancellation and experimental results of 2×2 MIMO in-band full-duplex radio front-end
AU - Lee, Donghyun
AU - Min, Byung Wook
PY - 2019/9
Y1 - 2019/9
N2 - This paper presents experimental results of self-interference cancellation of a 2×2 MIMO in-band full-duplex radio front-end. The proposed RF front-end consists of two rat race coupler and four antennas network, where passive suppression is done, and four self-interference reference generator, where active cancellation is done by making identical signal with residual self-interference signal, then subtracting it from received signal. As every antenna, followed by two rat race couplers, is used for transmitting and receiving simultaneously, MIMO antenna network can be constructed maintaining its own passive suppression. Also, a new type of time delay circuit, having high dynamic range of variable time and wideband performance, is used to be fit to arbitrary residual self-interference, after the passive suppression, and achieve wideband self-interference cancellation. Experimental results show 50-dB self-interference cancellation over 90-MHz, centered at 2.53 GHz.
AB - This paper presents experimental results of self-interference cancellation of a 2×2 MIMO in-band full-duplex radio front-end. The proposed RF front-end consists of two rat race coupler and four antennas network, where passive suppression is done, and four self-interference reference generator, where active cancellation is done by making identical signal with residual self-interference signal, then subtracting it from received signal. As every antenna, followed by two rat race couplers, is used for transmitting and receiving simultaneously, MIMO antenna network can be constructed maintaining its own passive suppression. Also, a new type of time delay circuit, having high dynamic range of variable time and wideband performance, is used to be fit to arbitrary residual self-interference, after the passive suppression, and achieve wideband self-interference cancellation. Experimental results show 50-dB self-interference cancellation over 90-MHz, centered at 2.53 GHz.
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U2 - 10.1109/PIMRCW.2019.8880818
DO - 10.1109/PIMRCW.2019.8880818
M3 - Conference contribution
T3 - 2019 IEEE 30th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC Workshops 2019
BT - 2019 IEEE 30th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC Workshops 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 30th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC Workshops 2019
Y2 - 8 September 2019
ER -