Frequency-Domain Hammerstein Self-Interference Canceller for In-Band Full-Duplex OFDM Systems

Kazuki Komatsu, Yuichi Miyaji, Hideyuki Uehara
2017 2017 IEEE Wireless Communications and Networking Conference (WCNC)  
In-band full-duplex communications have been spotlighted because they can double the spectral efficiency of the current wireless communication systems. However, it is necessary to mitigate the self-interference (SI). Currently, several time-domain and frequency-domain SI cancellers have been proposed. Timedomain SI cancellers are based on the parallel Hammerstein (PH) model, and they have good flexibility with high computational cost. In contrast, frequency-domain SI cancellers can achieve high
more » ... cancellation performance with low computational cost but they have less flexibility than time-domain PH based SI cancellers. In this paper, we propose a frequency-domain SI canceller based on the PH model. The proposed scheme estimates the frequency response of the SI channel and regenerates SI signals by the overlap-save method. Therefore, the computational complexity of the proposed scheme is less than time-domain PH based SI canceller. The performance of the proposed scheme is assessed by equivalent baseband signal simulations of a fullduplex transceiver. As a result, the proposed scheme achieves high SI cancellation as the time-domain PH based SI canceller with low computational cost. In addition, the convergence performance of the proposed scheme is faster than the time-domain scheme.
doi:10.1109/wcnc.2017.7925765 dblp:conf/wcnc/KomatsuMU17 fatcat:5aroxqyxcjfudfzve6goqxssxm