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학술지 Novel Digital Cancelation Method in Presence of Harmonic Self-Interference
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저자
주형식, 곽동혁, 이유로, 김태중
발행일
201704
출처
ETRI Journal, v.39 no.2, pp.245-254
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.17.0116.0498
협약과제
16MF1200, (통합)초연결 스마트 서비스를 위한 5G 이동통신 핵심기술개발, 정현규
초록
In-band full-duplex (IFD) communication has recently attracted a great deal of interest because it potentially provides a two-fold spectral efficiency increase over half-duplex communications. In this paper, we propose a novel digital self-interference cancelation (DSIC) algorithm for an IFD communication system in which two nodes exchange orthogonal frequency-division multiplexing (OFDM) symbols. The proposed DSIC algorithm is based on the least-squares estimation of a self-interference (SI) channel with block processing of multiple OFDM symbols, in order to eliminate the fundamental and harmonic components of SI induced through the practical radio frequency devices of an IFD transceiver. In addition, the proposed DSIC algorithm adopts discrete Fourier transform processing of the estimated SI channel to further enhance its cancelation performance. We provide a minimum number of training symbols to estimate the SI channel effectively. The evaluation results show that our proposed DSIC algorithm outperforms a conventional algorithm.
키워드
Digital self-interference cancelation, Discrete Fourier transform, In-band full duplex, Orthogonal frequency-division multiplexing
KSP 제안 키워드
Block processing, Communication system, Digital self, Full-Duplex(FuDu), Half-Duplex(HD), Harmonic component, In-band full duplex, Least Squares(LS), Least-squares estimation, Radio Frequency(RF), Si channel
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